GATE SCAN ATTACHMENT

[venkata reddy mallidi]

I am using the tutorial of si nanowire fet to analyse for InAs nanowire. but gatescan script im using here is not running plz help me to analyse gate scan for InAs nanowire and the error is

File “c:\users\mamta\appdata\local\temp\5203870735644037.py”,line16
New_region = [m(value = gate_voltage) for m in metallic_region]
                     ^
IndentationError: expected an indented block

[kstokbro]

This is a python syntax error,
The syntax of the script is not correct, there is an indentation error.
Please attach the full script for us to pinpoint what is wrong in the script

[venkata reddy mallidi]

# Read in the old configuration
device_configuration = nlread("nanodevice_huckel.nc",DeviceConfiguration)[0]
calculator = device_configuration.calculator()
metallic_regions = device_configuration.metallicRegions()
# Define gate_voltages
gate_voltage_list=[1.0, 2.0, 3.0, 4.0, 5.0]*Volt
# Define output file name
filename= "nanodevice_huckel.nc"
# Perform loop over gate voltages
for gate_voltage in gate_voltage_list:
    # Set the gate voltages to the new values
    new_regions = [m(value = gate_voltage) for m in metallic_regions]
    device_configuration.setMetallicRegions(new_regions)
    # Make a copy of the calculator and attach it to the configuration
    # Restart from the previous scf state
    device_configuration.setCalculator(calculator(),
         initial_state=device_configuration)
    device_configuration.update()
    nlsave(filename, device_configuration)
# Calculate analysis objects
electron_density = ElectronDifferenceDensity(device_configuration)
nlsave(filename, electron_density)
electrostatic_potential = ElectrostaticDifferencePotential(device_configuration)
nlsave(filename, electrostatic_potential)
transmission_spectrum = TransmissionSpectrum(
    configuration=device_configuration,
    energies=numpy.linspace(-3,3,101)*eV,
    self_energy_calculator=DirectSelfEnergy(),
    )
nlsave(filename, transmission_spectrum)
nlprint(transmission_spectrum)

[Umberto Martinez]

The script looks fine to me. Maybe something has been modified during the copy and paste operations. try one more time to download the script directly from here http://quantumwise.com/documents/tutorials/latest/NanowireDevice/index.html/examples/nanodevice-gatescan.py just check that the filename here

Code

device_configuration = nlread("nanodevice_huckel.nc",DeviceConfiguration)[0]

is correct.

[venkata reddy mallidi]

i have saved the nc file of silicon nanowire fet in the name of si_nanowirefet.nc
so in the very first line of gate scan script:
device_configuration = nlread("nanodevice_huckel.nc",DeviceConfiguration)[0]

should i need to write si_nanowirefet.nc instead of nanodevice_huckel.nc
   
Thanks

[Umberto Martinez]

yes, of course.
at that point you should not even have a file named nanodevice_huckel.nc which instead will be created by the nanodevice-gatescan.py script.

that should be pretty much straightforward. We will modify the script though.
hope you solved the problem now.

[venkata reddy mallidi]

There may be some error in this line of script of gate scan
new_regions = [m(value = gate_voltage) for m in metallic_regions],
bcoz many times I have run the script but it is showing the same error
\


new_regions = [m(value = gate_voltage) for m in metallic_regions]
              ^
IndentationError: expected an indented block

what is the meaning of m(value = gate_voltage),
please check the script

please help me in this regard.....I am trying for last many days

[Umberto Martinez]

can you attach the script to the post?
not copy and paste. attach it directly.

[venkata reddy mallidi]

sure

[Umberto Martinez]

As expected indentation is missing giving the syntax error.

please open the file and check again and download the file http://quantumwise.com/documents/tutorials/latest/NanowireDevice/index.html/examples/nanodevice-gatescan.py which is formatted correctly.
the script you copied below was correct, though.

[venkata reddy mallidi]

its ahowing like this help me in solvig this