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Scan_n_D_Bxyz.ipf
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Scan_n_D_Bxyz.ipf
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#pragma TextEncoding = "UTF-8"
#pragma rtGlobals=3 // Use modern global access method and strict wave access
#pragma DefaultTab={3,20,4} // Set default tab width in Igor Pro 9 and later
// 2D device scans
// Written by Zhenxiang Gao, Ray Su
// Mr Ray: the idea is to first set the device parameters, namely the top and bottom gate dielectric thickness first
// using the function setDualGateDeviceParameters(top_thickness, bottom_thickness)
// this creates several global variables that is used in to compute the matrix elements to convert from VtVb to n,D
// running the setDualGateDeviceParameters function should reset global variables, thus modifying the matrix elements
function setDualGateDeviceParameters(top_thickness, bottom_thickness, n0, ns)
// these are the estimated top and bottom gate dielectric thickness in nm
// n_offset is independently determined instrinsic doping of the sample, in units of 10^12 cm^-2
variable top_thickness, bottom_thickness, n0, ns
variable/G full_filling = ns
variable/G n_offset = n0
variable/G epsilon_hbn = 3.4
variable/G epsilon_0 = 8.8541878128e-12
variable/G electron_charge = 1.602176634e-19
variable/G top_capacitance = epsilon_0*epsilon_hbn/(top_thickness*1e-9) // these are the capacitances per unit area
variable/G bottom_capacitance = epsilon_0*epsilon_hbn/(bottom_thickness*1e-9)
end
// These are the matrix elements
function A_nt()
nvar top_capacitance
nvar electron_charge
return 1e-16*top_capacitance/electron_charge/1000
end
function A_nb()
nvar electron_charge
nvar bottom_capacitance
return 1e-16*bottom_capacitance/electron_charge/1000
end
function A_Dt()
nvar top_capacitance
nvar electron_charge
nvar epsilon_0
return -1e-9*top_capacitance/(2*epsilon_0)/1000
end
function A_Db()
nvar electron_charge
nvar bottom_capacitance
nvar epsilon_0
return 1e-9*bottom_capacitance/(2*epsilon_0)/1000
end
function B_tn()
nvar top_capacitance
nvar electron_charge
return 1000*1e16*electron_charge/(2*top_capacitance)
end
function B_tD()
nvar top_capacitance
nvar epsilon_0
return 1000*-1e9*epsilon_0/(top_capacitance)
end
function B_bn()
nvar bottom_capacitance
nvar electron_charge
return 1000*1e16*electron_charge/(2*bottom_capacitance)
end
function B_bD()
nvar bottom_capacitance
nvar epsilon_0
return 1000*1e9*epsilon_0/(bottom_capacitance)
end
//////////////////////////////////////////
////Convert b/w gate voltages and (n,D)///
//////////////////////////////////////////
function ConvertnuTon(nu)
variable nu
nvar full_filling
return nu*full_filling/4
end
function ConvertVtVbTon(Vtop,Vbtm) //Input Vtop and vbtm are in units of mV. e.g. '1000'->1V
variable Vtop,Vbtm
nvar n_offset
return A_nt()*Vtop+A_nb()*Vbtm - n_offset
end
function ConvertVtVbToD(Vtop,Vbtm) //Input Vtop and vbtm are in units of mV. e.g. '1000'->1V
variable Vtop,Vbtm
return A_Dt()*Vtop+A_Db()*Vbtm
end
function ConvertnDToVt(n,D) // Input n and D in units of 10^12/cm^2 and V/nm
variable n,D
nvar n_offset
return B_tn()*(n + n_offset)+B_tD()*D //Returned Vtop is in unit of mV. e.g. '1000'->1V
end
function ConvertnDToVb(n,D)
variable n,D
nvar n_offset
return B_bn()*(n + n_offset)+B_bD()*D //Returned Vbtm is in unit of mV. e.g. '1000'->1V
end
function ConvertVtDtoVb(Vtop,D)
variable Vtop,D
return (D-A_Dt()*Vtop)/A_Db()
end
function ConvertVtntoVb(Vtop,n)
variable Vtop,n
nvar n_offset
return ((n + n_offset)-A_nt()*Vtop)/A_nb()
end
function Scansrsamp(instrID, startx, finx,numptsx, delayx, [y_label, comments, nosave]) //Units: mV
variable instrID, startx, finx, numptsx, delayx, nosave
string y_label, comments
variable i=0, j=0, setpointx
// Reconnect instruments
sc_openinstrconnections(0)
comments = selectstring(paramisdefault(comments), comments, "")
y_label = selectstring(paramisdefault(y_label), y_label, "")
struct ScanVars S
initScanVars(S, instrIDx=instrID, startx=startx, finx=finx, numptsx=numptsx, delayx=delayx, \
y_label=y_label, x_label = "srsamp", comments=comments)
// set starting values
setpointx = startx
setsrsamplitude(instrID,setpointx)
sc_sleep(10)
// Make waves and graphs etc
initializeScan(S)
do
setpointx = startx + (i*(finx-startx)/(numptsx-1))
setsrsamplitude(instrID,setpointx)
sc_sleep(S.delayx)
RecordValues(S, i, 0)
i+=1
while (i<S.numptsx)
// Save by default
if (nosave == 0)
EndScan(S=S)
else
dowindow /k SweepControl
endif
end
////////////////
//Scan n and D//
////////////////
//ConvertVtVbTon
function Scan_n_si(instrIDx,instrIDy,instrID_si_gate, fixedD,startn,finn,numptsn,delayn,rampraten, [y_label, comments, nosave]) //Units: mV
variable instrIDx,instrIDy,instrID_si_gate, fixedD,startn,finn,numptsn,delayn,rampraten,nosave
//variable instrIDx, startx, finx, numpts, delay, rampratebothxy, instrIDy, starty, finy, nosave
string y_label, comments
// Reconnect instruments
sc_openinstrconnections(0)
print(fixedD)
// Set defaults
comments = selectstring(paramisdefault(comments), comments, "")
//y_label = selectstring(paramisdefault(y_label), y_label, "R (Ω)")
// Initialize ScanVars
struct ScanVars S
initScanVars(S, \
instrIDx=instrIDx, \
startx=startn, \
finx=finn, \
numptsx=numptsn, \
delayx=delayn, \
rampratex=rampraten,\
instrIDy=instrIDy, \
starty=ConvertnDToVb(startn,fixedD), \
finy=ConvertnDToVb(finn,fixedD), \
numptsy=numptsn, \
delayy=delayn, \
rampratey=rampraten,\
y_label=y_label, \
comments=comments)
// Check software limits and ramprate limits
// PreScanChecksKeithley(S)
S.is2d=0
// Ramp to start without checks because checked above
rampK2400Voltage(S.instrIDx, ConvertnDToVt(startn,fixedD))
rampK2400Voltage(S.instrIDy, S.starty)
// Let gates settle
sc_sleep(2)
// Make waves and graphs etc
initializeScan(S)
// Main measurement loop
variable i=0, j=0, setpointx, setpointy, last_val
last_val = startn
if (startn > 0)
rampk2400Voltage(instrID_si_gate, 10000)
else
rampk2400Voltage(instrID_si_gate, -10000)
endif
do
setpointy = S.starty + (i*(S.finy-S.starty)/(S.numptsy-1)) //the 2nd Keithley, y corresponds to i
setpointx =ConvertnDToVt(startn,fixedD) + (j*(ConvertnDToVt(finn,fixedD)-ConvertnDToVt(startn,fixedD))/(S.numptsx-1)) //the 1st Keithley, x corresponds to j
// rampK2400Voltage(S.instrIDy, setpointy, ramprate=S.rampratey)
// rampK2400Voltage(S.instrIDx, setpointx, ramprate=S.rampratex) // change to set voltage instead
// if the current carrier density is positive, but the last value is negative
if (ConvertVtVbTon(setpointx, setpointy) > 0 && last_val < 0)
rampk2400Voltage(instrID_si_gate, 10000)
elseif (ConvertVtVbTon(setpointx, setpointy) < 0 && last_val > 0)
rampk2400Voltage(instrID_si_gate, -10000)
endif
// if last was + and current is + , last was - and current is -, don't do anything
setK2400Voltage(S.instrIDy, setpointy)
setK2400Voltage(S.instrIDx, setpointx)
sc_sleep(S.delayy)
sc_sleep(S.delayx)
RecordValues(S, i, j)
i+=1
j+=1
while (i<S.numptsy&&j<S.numptsx)
// Save by default
if (nosave == 0)
EndScan(S=S)
else
dowindow /k SweepControl
endif
end
function Scan_n(instrIDx,instrIDy,fixedD,startn,finn,numptsn,delayn,rampraten, [y_label, comments, nosave]) //Units: mV
variable instrIDx,instrIDy,fixedD,startn,finn,numptsn,delayn,rampraten,nosave
//variable instrIDx, startx, finx, numpts, delay, rampratebothxy, instrIDy, starty, finy, nosave
string y_label, comments
// Reconnect instruments
sc_openinstrconnections(0)
print(fixedD)
// Set defaults
comments = selectstring(paramisdefault(comments), comments, "")
//y_label = selectstring(paramisdefault(y_label), y_label, "R (Ω)")
// Initialize ScanVars
struct ScanVars S
initScanVars(S, \
instrIDx=instrIDx, \
startx=startn, \
finx=finn, \
numptsx=numptsn, \
delayx=delayn, \
rampratex=rampraten,\
instrIDy=instrIDy, \
starty=ConvertnDToVb(startn,fixedD), \
finy=ConvertnDToVb(finn,fixedD), \
numptsy=numptsn, \
delayy=delayn, \
rampratey=rampraten,\
y_label=y_label, \
comments=comments)
// Check software limits and ramprate limits
// PreScanChecksKeithley(S)
S.is2d=0
// Ramp to start without checks because checked above
rampK2400Voltage(S.instrIDx, ConvertnDToVt(startn,fixedD))
rampK2400Voltage(S.instrIDy, S.starty)
// Let gates settle
sc_sleep(2)
// Make waves and graphs etc
initializeScan(S)
// Main measurement loop
variable i=0, j=0, setpointx, setpointy
do
setpointy = S.starty + (i*(S.finy-S.starty)/(S.numptsy-1)) //the 2nd Keithley, y corresponds to i
setpointx =ConvertnDToVt(startn,fixedD) + (j*(ConvertnDToVt(finn,fixedD)-ConvertnDToVt(startn,fixedD))/(S.numptsx-1)) //the 1st Keithley, x corresponds to j
// rampK2400Voltage(S.instrIDy, setpointy, ramprate=S.rampratey)
// rampK2400Voltage(S.instrIDx, setpointx, ramprate=S.rampratex) // change to set voltage instead
setK2400Voltage(S.instrIDy, setpointy)
setK2400Voltage(S.instrIDx, setpointx)
sc_sleep(S.delayy)
sc_sleep(S.delayx)
RecordValues(S, i, j)
i+=1
j+=1
while (i<S.numptsy&&j<S.numptsx)
// Save by default
if (nosave == 0)
EndScan(S=S)
else
dowindow /k SweepControl
endif
end
function Scan_D(instrIDx,instrIDy,fixedn,startD,finD,numptsD,delayD,ramprateD, [y_label, comments, nosave]) //Units: mV
variable instrIDx,instrIDy,fixedn,startD,finD,numptsD,delayD,ramprateD,nosave
//variable instrIDx, startx, finx, numpts, delay, rampratebothxy, instrIDy, starty, finy, nosave
string y_label, comments
// Reconnect instruments
sc_openinstrconnections(0)
// Set defaults
comments = selectstring(paramisdefault(comments), comments, "")
y_label = selectstring(paramisdefault(y_label), y_label, "")
// Initialize ScanVars
struct ScanVars S
initScanVars(S, \
instrIDx=instrIDx, \
startx=startD, \
finx=finD, \
numptsx=numptsD, \
delayx=delayD, \
rampratex=ramprateD, \
instrIDy=instrIDy, \
starty=convertnDToVb(fixedn, startD), \
finy=convertnDToVb(fixedn, finD), \
numptsy=numptsD, \
delayy=delayD, \
rampratey=ramprateD, \
y_label=y_label, \
x_label = "D field", \
comments=comments)
// Check software limits and ramprate limits
// PreScanChecksKeithley(S)
S.is2d=0
// Ramp to start without checks because checked above
rampK2400Voltage(S.instrIDx, convertnDToVt(fixedn, startD))
rampK2400Voltage(S.instrIDy, S.starty)
// Let gates settle
sc_sleep(S.delayy*5)
// Make waves and graphs etc
initializeScan(S)
// Main measurement loop
variable i=0, j=0, setpointx, setpointy
do
setpointy = S.starty + (i*(S.finy-S.starty)/(S.numptsy-1)) //the 2nd Keithley, y corresponds to i
setpointx = convertnDToVt(fixedn, startD) + (j*(convertnDToVt(fixedn, finD)-convertnDToVt(fixedn, startD))/(S.numptsx-1)) //the 1st Keithley, x corresponds to j
// rampK2400Voltage(S.instrIDy, setpointy, ramprate=S.rampratey)
// rampK2400Voltage(S.instrIDx, setpointx, ramprate=S.rampratex)
setK2400Voltage(S.instrIDy, setpointy)
setK2400Voltage(S.instrIDx, setpointx)
sc_sleep(S.delayy)
sc_sleep(S.delayx)
RecordValues(S, i, j)
i+=1
j+=1
while (i<S.numptsy&&j<S.numptsx)
// Save by default
if (nosave == 0)
EndScan(S=S)
else
dowindow /k SweepControl
endif
end
function ScanFastDacSlowAND2K2400n2D(instrIDx, startx, finx, channelsx, numptsx, delayx, rampratex, keithleyIDtop,keithleyIDbtm,fixedD, startn, finn, numptsn, delayn, rampraten, [ y_label, comments, nosave]) //Units: mV
variable keithleyIDtop,keithleyIDbtm, fixedD, startn, finn, numptsn, delayn, rampraten, instrIDx, startx, finx, numptsx, delayx, rampratex,nosave
string channelsx, y_label, comments
// abort "WARNING: This scan has not been tested with an instrument connected. Remove this abort and test the behavior of the scan before running on a device!"
variable Vtgn=B_tn()
variable VtgD=B_tD()
variable Vbgn=B_bn()
variable VbgD=B_bD()
//Convert the input-from-keyboard start/finish carrier density n and fixed D to start/finish V_top/V_btm
//variable startTop,startBtm,FinTop,FinBtm
variable startTop=convertnDToVt(startn, fixedD)
variable startBtm=convertnDToVb(startn, fixedD)
variable finTop=convertnDToVt(finn, fixedD)
variable finBtm=convertnDToVb(finn, fixedD)
// Reconnect instruments
sc_openinstrconnections(0)
// Set defaults
comments = selectstring(paramisdefault(comments), comments, "")
y_label = selectstring(paramisdefault(y_label), y_label, "n")
// Initialize ScanVars
struct ScanVars S
initScanVars(S, instrIDx=instrIDx, startx=startx, finx=finx, numptsx=numptsx, delayx=delayx, rampratex=rampratex, \
instrIDy=keithleyIDtop, starty=startn, finy=finn, numptsy=numptsn, delayy=delayn, rampratey=rampraten, \
y_label=y_label, comments=comments, channelsx = channelsx)
// Check limits (not as much to check when using FastDAC slow)
scc_checkLimsFD(S)
S.lims_checked = 1
// Ramp to start without checks because checked above
rampMultipleFDAC(instrIDx, channelsx, startx, ramprate=rampratex, ignore_lims=1)
// Ramp to start without checks because checked above
rampK2400Voltage(keithleyIDtop, startTop, ramprate=rampraten)
rampK2400Voltage(keithleyIDbtm, startBtm, ramprate=rampraten)
// Let gates settle
sc_sleep(S.delayy*5)
// Make waves and graphs etc
initializeScan(S)
// Main measurement loop
variable i=0, j=0, setpointn, setpointD, setpointTop,setpointBtm, setpointfd
do
setpointD = fixedD
setpointfd = S.startx
setpointn = S.starty + (i*(S.finy-S.starty)/(S.numptsy-1))
setpointTop=convertnDToVt(setpointn, setpointD)
setpointBtm=convertnDToVb(setpointn, setpointD)
rampK2400Voltage(keithleyIDtop, setpointTop, ramprate=rampraten)
rampK2400Voltage(keithleyIDbtm, setpointBtm, ramprate=rampraten)
rampMultipleFDAC(instrIDx, channelsx, setpointfd, ramprate=rampratex, ignore_lims=1)
sc_sleep(S.delayy)
j=0
do
// setpointn = S.starty + (i*(S.finy-S.starty)/(S.numptsy-1))
// setpointTop=convertnDToVt(setpointn, setpointD)
// setpointBtm=convertnDToVb(setpointn, setpointD)
setpointfd = S.startx + (j*(S.finx-S.startx)/(S.numptsx-1))
// setK2400Voltage(keithleyIDtop, setpointTop)
// setK2400Voltage(keithleyIDbtm, setpointBtm)
rampMultipleFDAC(instrIDx, channelsx, setpointfd, ramprate=rampratex, ignore_lims=1)
sc_sleep(S.delayx)
RecordValues(S, i, j)
j+=1
while (j<S.numptsx)
i+=1
while (i<S.numptsy)
// Save by default
if (nosave == 0)
EndScan(S=S)
else
dowindow /k SweepControl
endif
end
function ScanFastDacSlowAND2K2400D2D(instrIDx, startx, finx, channelsx, numptsx, delayx, rampratex, keithleyIDtop,keithleyIDbtm,fixedn, startD, finD, numptsD, delayD, ramprateD, [ y_label, comments, nosave]) //Units: mV
variable keithleyIDtop,keithleyIDbtm, fixedn, startD, finD, numptsD, delayD, ramprateD, instrIDx, startx, finx, numptsx, delayx, rampratex,nosave
string channelsx, y_label, comments
// abort "WARNING: This scan has not been tested with an instrument connected. Remove this abort and test the behavior of the scan before running on a device!"
variable Vtgn=B_tn()
variable VtgD=B_tD()
variable Vbgn=B_bn()
variable VbgD=B_bD()
//Convert the input-from-keyboard start/finish carrier density n and fixed D to start/finish V_top/V_btm
//variable startTop,startBtm,FinTop,FinBtm
variable startTop=convertnDToVt(fixedn, startD)
variable startBtm=convertnDToVb(fixedn, startD)
variable finTop=convertnDToVt(fixedn, finD)
variable finBtm=convertnDToVb(fixedn, finD)
// Reconnect instruments
sc_openinstrconnections(0)
// Set defaults
comments = selectstring(paramisdefault(comments), comments, "")
y_label = selectstring(paramisdefault(y_label), y_label, "D")
// Initialize ScanVars
struct ScanVars S
initScanVars(S, instrIDx=instrIDx, startx=startx, finx=finx, numptsx=numptsx, delayx=delayx, rampratex=rampratex, \
instrIDy=keithleyIDtop, starty=startD, finy=finD, numptsy=numptsD, delayy=delayD, rampratey=ramprateD, \
y_label=y_label, comments=comments, channelsx = channelsx)
// Check limits (not as much to check when using FastDAC slow)
scc_checkLimsFD(S)
S.lims_checked = 1
// Ramp to start without checks because checked above
rampMultipleFDAC(instrIDx, channelsx, startx, ramprate=rampratex, ignore_lims=1)
// Ramp to start without checks because checked above
rampK2400Voltage(keithleyIDtop, startTop, ramprate=ramprateD)
rampK2400Voltage(keithleyIDbtm, startBtm, ramprate=ramprateD)
// Let gates settle
sc_sleep(S.delayy*5)
// Make waves and graphs etc
initializeScan(S)
// Main measurement loop
variable i=0, j=0, setpointn, setpointD, setpointTop,setpointBtm, setpointfd
do
setpointn = fixedn
setpointD = S.starty + (i*(S.finy-S.starty)/(S.numptsy-1))
setpointfd = S.startx
setpointTop=convertnDToVt(setpointn, setpointD)
setpointBtm=convertnDToVb(setpointn, setpointD)
rampK2400Voltage(keithleyIDtop, setpointTop, ramprate=ramprateD)
rampK2400Voltage(keithleyIDbtm, setpointBtm, ramprate=ramprateD)
rampMultipleFDAC(instrIDx, channelsx, setpointfd, ramprate=rampratex, ignore_lims=1)
sc_sleep(S.delayy)
j=0
do
setpointfd = S.startx + (j*(S.finx-S.startx)/(S.numptsx-1))
rampMultipleFDAC(instrIDx, channelsx, setpointfd, ramprate=rampratex, ignore_lims=1)
sc_sleep(S.delayx)
RecordValues(S, i, j)
j+=1
while (j<S.numptsx)
i+=1
while (i<S.numptsy)
// Save by default
if (nosave == 0)
EndScan(S=S)
else
dowindow /k SweepControl
endif
end
function Scan2K2400nANDFastDacSlow2D(keithleyIDtop,keithleyIDbtm,fixedD, startn, finn, numptsn, delayn, rampraten, instrIDy, starty, finy, channelsy, numptsy, delayy, rampratey, [ y_label, comments, nosave]) //Units: mV
variable keithleyIDtop,keithleyIDbtm, fixedD, startn, finn, numptsn, delayn, rampraten, instrIDy, starty, finy, numptsy, delayy, rampratey,nosave
string channelsy, y_label, comments
abort "WARNING: This scan has not been tested with an instrument connected. Remove this abort and test the behavior of the scan before running on a device!"
variable Vtgn=B_tn()
variable VtgD=B_tD()
variable Vbgn=B_bn()
variable VbgD=B_bD()
//Convert the input-from-keyboard start/finish carrier density n and fixed D to start/finish V_top/V_btm
//variable startTop,startBtm,FinTop,FinBtm
variable startTop=convertnDToVt(startn, fixedD)
variable startBtm=convertnDToVb(startn, fixedD)
variable finTop=convertnDToVt(finn, fixedD)
variable finBtm=convertnDToVb(finn, fixedD)
// Reconnect instruments
sc_openinstrconnections(0)
// Set defaults
comments = selectstring(paramisdefault(comments), comments, "")
y_label = selectstring(paramisdefault(y_label), y_label, "fd (mV)")
// Initialize ScanVars
struct ScanVars S
initScanVars(S, instrIDx=keithleyIDtop, startx=startn, finx=finn, numptsx=numptsn, delayx=delayn, rampratex=rampraten, \
instrIDy=keithleyIDbtm, starty=starty, finy=finy, numptsy=numptsy, delayy=delayy, rampratey=rampratey, \
y_label=y_label, comments=comments, channelsy = channelsy)
// Check limits (not as much to check when using FastDAC slow)
scc_checkLimsFD(S)
S.lims_checked = 1
//Security Check of using 'setK2400Voltage' instead of 'ramp'
variable KeithleyStepThreshold=40 //Never use 'setK2400Voltage' to make a gate voltage change bigger than this!!!
variable absDeltaVtop=abs(Vtgn*(S.finx-S.startx)/(S.numptsx-1))
variable absDeltaVbtm=abs(Vbgn*(S.finx-S.startx)/(S.numptsx-1))
if(absDeltaVtop>KeithleyStepThreshold||absDeltaVbtm>KeithleyStepThreshold)
print "You will kill the device!!!"
return -1
endif
// Ramp to start without checks because checked above
rampK2400Voltage(keithleyIDtop, startTop, ramprate=rampraten)
rampK2400Voltage(keithleyIDbtm, startBtm, ramprate=rampraten)
// Ramp to start without checks because checked above
rampMultipleFDAC(instrIDy, channelsy, starty, ramprate=rampratey, ignore_lims=1)
// Let gates settle
sc_sleep(S.delayy*5)
// Make waves and graphs etc
initializeScan(S)
// Main measurement loop
variable i=0, j=0, setpointn, setpointD, setpointTop,setpointBtm, setpointfd
do
setpointn = S.startx
setpointD = fixedD
setpointfd = S.starty + (i*(S.finy-S.starty)/(S.numptsy-1))
setpointTop=convertnDToVt(setpointn, setpointD)
setpointBtm=convertnDToVb(setpointn, setpointD)
rampK2400Voltage(keithleyIDtop, setpointTop, ramprate=rampraten)
rampK2400Voltage(keithleyIDbtm, setpointBtm, ramprate=rampraten)
rampMultipleFDAC(instrIDy, channelsy, setpointfd, ramprate=rampratey, ignore_lims=1)
sc_sleep(S.delayy)
j=0
do
setpointn = S.startx + (j*(S.finx-S.startx)/(S.numptsx-1))
setpointTop=convertnDToVt(setpointn, setpointD)
setpointBtm=convertnDToVb(setpointn, setpointD)
setpointfd = S.starty + (i*(S.finy-S.starty)/(S.numptsy-1))
setK2400Voltage(keithleyIDtop, setpointTop)
setK2400Voltage(keithleyIDbtm, setpointBtm)
rampMultipleFDAC(instrIDy, channelsy, setpointfd, ramprate=rampratey,ignore_lims=1)
sc_sleep(S.delayx)
RecordValues(S, i, j)
j+=1
while (j<S.numptsx)
i+=1
while (i<S.numptsy)
// Save by default
if (nosave == 0)
EndScan(S=S)
else
dowindow /k SweepControl
endif
end
//////////////////////
//2D "n&D map" scans//
//////////////////////
//'Set' D at D_0, D_1, D_2,..., and do an n scan at each D value
function Scan2K2400nANDd2D(keithleyIDtop,keithleyIDbtm,startn, finn, numptsn, delayn, rampraten, startD,finD,numptsD,delayD,ramprateD,[ y_label, comments, nosave]) //Units: mV
variable keithleyIDtop,keithleyIDbtm,startn, finn, numptsn, delayn, rampraten, startD,finD,numptsD,delayD,ramprateD,nosave
string y_label, comments
//Two column vectors, Transpose(n,D) and Transpose(V_top,V_btm) can be converted to each other by a matrix A and its inverse B
//Specifically, n=A_nt*V_top+A_nb*V_btm and D=A_Dt*V_top+A_Db*V_btm. V_top=B_tn*n+B_tD*D and V_btm=B_bn*n+B_bD*D
//For our current device, the values of these convertion matrix elements are as below:
variable Vtgn=B_tn()
variable VtgD=B_tD()
variable Vbgn=B_bn()
variable VbgD=B_bD()
//Convert the input-from-keyboard start/finish carrier density n and fixed D to start/finish V_top/V_btm
//variable startTop,startBtm,FinTop,FinBtm
variable startTop=convertnDToVt(startn, startD)
variable startBtm=convertnDToVb(startn, startD)
variable finTop=convertnDToVt(finn, finD)
variable finBtm=convertnDToVb(finn, finD)
// Reconnect instruments
sc_openinstrconnections(0)
// Set defaults
comments = selectstring(paramisdefault(comments), comments, "")
//y_label = selectstring(paramisdefault(y_label), y_label, "Field /mT")
// Initialize ScanVars
struct ScanVars S
initScanVars(S, instrIDx=keithleyIDtop, startx=startn, finx=finn, numptsx=numptsn, delayx=delayn, rampratex=rampraten, \
instrIDy=keithleyIDbtm, starty=startD, finy=finD, numptsy=numptsD, delayy=delayD, rampratey=ramprateD, \
y_label=y_label, comments=comments)
//Security Check of using 'setK2400Voltage' instead of 'ramp'
variable KeithleyStepThreshold=40 //Never use 'setK2400Voltage' to make a gate voltage change bigger than this!!!
variable absDeltaVtop=abs(Vtgn*(S.finx-S.startx)/(S.numptsx-1))
variable absDeltaVbtm=abs(Vbgn*(S.finx-S.startx)/(S.numptsx-1))
if(absDeltaVtop>KeithleyStepThreshold||absDeltaVbtm>KeithleyStepThreshold)
print "You will kill the device!!!"
return -1
endif
// Check software limits and ramprate limits
// PreScanChecksKeithley(S, x_only=1)
// Ramp to start without checks because checked above
//rampK2400Voltage(S.instrIDx, startx, ramprate=S.rampratex)
rampK2400Voltage(keithleyIDtop, startTop, ramprate=rampraten)
rampK2400Voltage(keithleyIDbtm, startBtm, ramprate=ramprateD)
// Let gates settle
sc_sleep(S.delayy*5)
// Make waves and graphs etc
initializeScan(S)
// Main measurement loop
variable i=0, j=0, setpointn, setpointD,setpointTop,setpointBtm
do
setpointn = S.startx
setpointD = S.starty + (i*(S.finy-S.starty)/(S.numptsy-1))
setpointTop=convertnDToVt(setpointn, setpointD)
setpointBtm=convertnDToVb(setpointn, setpointD)
rampK2400Voltage(keithleyIDtop, setpointTop, ramprate=rampraten)
rampK2400Voltage(keithleyIDbtm, setpointBtm, ramprate=ramprateD)
sc_sleep(S.delayy)
j=0
do
setpointn = S.startx + (j*(S.finx-S.startx)/(S.numptsx-1))
setpointTop=convertnDToVt(setpointn, setpointD)
setpointBtm=convertnDToVb(setpointn, setpointD)
setK2400Voltage(keithleyIDtop, setpointTop)
setK2400Voltage(keithleyIDbtm, setpointBtm)
sc_sleep(S.delayx)
RecordValues(S, i, j)
j+=1
while (j<S.numptsx)
i+=1
while (i<S.numptsy)
// Save by default
if (nosave == 0)
EndScan(S=S)
else
dowindow /k SweepControl
endif
end
//'Set' n at n_0, n_1, n_2,..., and do a D scan at each n value
function Scan2K2400dANDn2D(keithleyIDtop,keithleyIDbtm,startn, finn, numptsn, delayn, rampraten, startD,finD,numptsD,delayD,ramprateD,[ y_label, comments, nosave]) //Units: mV
variable keithleyIDtop,keithleyIDbtm,startn, finn, numptsn, delayn, rampraten, startD,finD,numptsD,delayD,ramprateD,nosave
string y_label, comments
//Two column vectors, Transpose(n,D) and Transpose(V_top,V_btm) can be converted to each other by a matrix A and its inverse B
//Specifically, n=A_nt*V_top+A_nb*V_btm and D=A_Dt*V_top+A_Db*V_btm. V_top=B_tn*n+B_tD*D and V_btm=B_bn*n+B_bD*D
//For our current device, the values of these convertion matrix elements are as below:
variable Vtgn=B_tn()
variable VtgD=B_tD()
variable Vbgn=B_bn()
variable VbgD=B_bD()
//Convert the input-from-keyboard start/finish carrier density n and fixed D to start/finish V_top/V_btm
//variable startTop,startBtm,FinTop,FinBtm
variable startTop=convertnDToVt(startn, startD)
variable startBtm=convertnDToVb(startn, startD)
variable finTop=convertnDToVt(finn, finD)
variable finBtm=convertnDToVb(finn, finD)
// Reconnect instruments
sc_openinstrconnections(0)
// Set defaults
comments = selectstring(paramisdefault(comments), comments, "")
//y_label = selectstring(paramisdefault(y_label), y_label, "Field /mT")
// Initialize ScanVars
struct ScanVars S
initScanVars(S, instrIDx=keithleyIDtop, startx=startn, finx=finn, numptsx=numptsn, delayx=delayn, rampratex=rampraten, \
instrIDy=keithleyIDbtm, starty=startD, finy=finD, numptsy=numptsD, delayy=delayD, rampratey=ramprateD, \
y_label=y_label, comments=comments)
//Security Check of using 'setK2400Voltage' instead of 'ramp'
variable KeithleyStepThreshold=40 //Never use 'setK2400Voltage' to make a gate voltage change bigger than this!!!
variable absDeltaVtop=abs(Vtgn*(S.finx-S.startx)/(S.numptsx-1))
variable absDeltaVbtm=abs(Vbgn*(S.finx-S.startx)/(S.numptsx-1))
if(absDeltaVtop>KeithleyStepThreshold||absDeltaVbtm>KeithleyStepThreshold)
print "You will kill the device!!!"
return -1
endif
// Check software limits and ramprate limits
// PreScanChecksKeithley(S, x_only=1)
// Ramp to start without checks because checked above
//rampK2400Voltage(S.instrIDx, startx, ramprate=S.rampratex)
rampK2400Voltage(keithleyIDtop, startTop, ramprate=rampraten)
rampK2400Voltage(keithleyIDbtm, startBtm, ramprate=ramprateD)
// Let gates settle
sc_sleep(S.delayy*5)
// Make waves and graphs etc
initializeScan(S)
// Main measurement loop
variable i=0, j=0, setpointn, setpointD,setpointTop,setpointBtm
do
setpointD = S.starty
setpointn = S.startx + (j*(S.finx-S.startx)/(S.numptsx-1))
setpointTop=convertnDToVt(setpointn, setpointD)
setpointBtm=convertnDToVb(setpointn, setpointD)
rampK2400Voltage(keithleyIDtop, setpointTop, ramprate=rampraten)
rampK2400Voltage(keithleyIDbtm, setpointBtm, ramprate=ramprateD)
sc_sleep(S.delayy)
i=0
do
setpointD = S.starty + (i*(S.finy-S.starty)/(S.numptsy-1))
setpointTop=convertnDToVt(setpointn, setpointD)
setpointBtm=convertnDToVb(setpointn, setpointD)
setK2400Voltage(keithleyIDtop, setpointTop)
setK2400Voltage(keithleyIDbtm, setpointBtm)
sc_sleep(S.delayx)
RecordValues(S, i,j)
i+=1
while (i<S.numptsy)
j+=1
while (j<S.numptsx)
// Save by default
if (nosave == 0)
EndScan(S=S)
else
dowindow /k SweepControl
endif
end
function Scan_field_D_2D(keithleyIDtop,keithleyIDbtm,fixedn,startD, finD, numptsD, delayD, ramprateD, magnetID, starty, finy, numptsy, delayy, [rampratey, y_label, comments, nosave]) //Units: mV
variable keithleyIDtop,keithleyIDbtm,fixedn,startD, finD, numptsD, delayD, ramprateD, magnetID, starty, finy, numptsy, delayy, rampratey, nosave
string y_label, comments
// Reconnect instruments
sc_openinstrconnections(0)
// Set defaults
comments = selectstring(paramisdefault(comments), comments, "")
//sprintf x_label,"n (cm\S-2\M)"
y_label = selectstring(paramisdefault(y_label), y_label, "B (mT)")
variable startTop=convertnDToVt(fixedn, startD)
variable startBtm=convertnDToVb(fixedn, startD)
variable finTop=convertnDToVt(fixedn, finD)
variable finBtm=convertnDToVb(fixedn, finD)
// Initialize ScanVars
struct ScanVars S
initScanVars(S, instrIDx=keithleyIDtop, startx=startD, finx=finD, numptsx=numptsD, delayx=delayD, rampratex=ramprateD, \
instrIDy=magnetID, starty=starty, finy=finy, numptsy=numptsy, delayy=delayy, rampratey=rampratey, \
y_label=y_label, comments=comments)
// Check software limits and ramprate limits
// PreScanChecksKeithley(S, x_only=1)
// PreScanChecksMagnet(S, y_only=1)
//Security Check of using 'setK2400Voltage' instead of 'ramp'
variable KeithleyStepThreshold=100 //Never use 'setK2400Voltage' to make a gate voltage change bigger than this!!!
variable absDeltaVtop=abs(B_tD()*(S.finx-S.startx)/(S.numptsx-1))
variable absDeltaVbtm=abs(B_bD()*(S.finx-S.startx)/(S.numptsx-1))
if(absDeltaVtop>KeithleyStepThreshold||absDeltaVbtm>KeithleyStepThreshold)
print "You will kill the device!!!"
return -1
endif
// Ramp to start without checks because checked above
//rampK2400Voltage(S.instrIDx, startx, ramprate=S.rampratex)
rampK2400Voltage(keithleyIDtop, startTop, ramprate=S.rampratex)
rampK2400Voltage(keithleyIDbtm, startBtm, ramprate=S.rampratex)
if (!paramIsDefault(rampratey))
setLS625rate(magnetID,rampratey)
endif
setlS625fieldWait(S.instrIDy, starty )
// Let gates settle
sc_sleep(S.delayy*5)
// Make waves and graphs etc
initializeScan(S)
// Main measurement loop
variable i=0, j=0, setpointx, setpointy,setpointTop,setpointBtm
do
setpointx = S.startx
setpointTop=convertnDToVt(fixedn, setpointx)
setpointBtm=convertnDToVb(fixedn, setpointx)
setpointy = S.starty + (i*(S.finy-S.starty)/(S.numptsy-1))
setlS625field(S.instrIDy, setpointy)
rampK2400Voltage(keithleyIDtop, setpointTop, ramprate=S.rampratex)
rampK2400Voltage(keithleyIDbtm, setpointBtm, ramprate=S.rampratex)
setlS625fieldWait(S.instrIDy, setpointy, short_wait=1)
sc_sleep(S.delayy)
j=0
do
setpointx = S.startx + (j*(S.finx-S.startx)/(S.numptsx-1))
setpointTop=convertnDToVt(fixedn, setpointx)
setpointBtm=convertnDToVb(fixedn, setpointx)
setK2400Voltage(keithleyIDtop, setpointTop)
setK2400Voltage(keithleyIDbtm, setpointBtm)
// rampK2400Voltage(keithleyIDtop, setpointTop, ramprate=S.rampratex)
// rampK2400Voltage(keithleyIDbtm, setpointBtm, ramprate=S.rampratex)
sc_sleep(S.delayx)
RecordValues(S, i, j)
j+=1
while (j<S.numptsx)
i+=1
while (i<S.numptsy)
// Save by default
if (nosave == 0)
EndScan(S=S)
else
dowindow /k SweepControl
endif
end
////////////////
//2D B-n scans//
////////////////
function Scan_field_n_2D(keithleyIDtop,keithleyIDbtm,fixedD,startn, finn, numptsn, delayn, rampraten, magnetID, starty, finy, numptsy, delayy, [rampratey, y_label, comments, nosave]) //Units: mV
variable keithleyIDtop,keithleyIDbtm,fixedD,startn, finn, numptsn, delayn, rampraten, magnetID, starty, finy, numptsy, delayy, rampratey, nosave
string y_label, comments
// Reconnect instruments
sc_openinstrconnections(0)
// Set defaults
comments = selectstring(paramisdefault(comments), comments, "")
//sprintf x_label,"n (cm\S-2\M)"
y_label = selectstring(paramisdefault(y_label), y_label, "B\B⊥\M (mT)")
//Two column vectors, Transpose(n,D) and Transpose(V_top,V_btm) can be converted to each other by a matrix A and its inverse B
//Specifically, n=A_nt*V_top+A_nb*V_btm and D=A_Dt*V_top+A_Db*V_btm. V_top=B_tn*n+B_tD*D and V_btm=B_bn*n+B_bD*D
//For our current device, the values of these convertion matrix elements are as below:
variable Vtgn=B_tn()
variable VtgD=B_tD()
variable Vbgn=B_bn()
variable VbgD=B_bD()
//Convert the input-from-keyboard start/finish carrier density n and fixed D to start/finish V_top/V_btm
//variable startTop,startBtm,FinTop,FinBtm
variable startTop=convertnDToVt(startn, fixedD)
variable startBtm=convertnDToVb(startn, fixedD)
variable finTop=convertnDToVt(finn, fixedD)
variable finBtm=convertnDToVb(finn, fixedD)
// Initialize ScanVars
struct ScanVars S
initScanVars(S, instrIDx=keithleyIDtop, startx=startn, finx=finn, numptsx=numptsn, delayx=delayn, rampratex=rampraten, \
instrIDy=magnetID, starty=starty, finy=finy, numptsy=numptsy, delayy=delayy, rampratey=rampratey, \
y_label=y_label, comments=comments)
// Check software limits and ramprate limits