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I-Vg curve

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tara95:
Hi,
I want to plot Id-Vg curve for my transistors but I do not know  how to write python code for drain current vs gate voltage.please help me

Petr Khomyakov:
Take a look at this tutorial, https://docs.quantumwise.com/tutorials/inas_p-i-n_junction/inas_p-i-n_junction.html.

tara95:
Do you mean  following file؟
# Define names of output files
filenamec = 'gatescan_conf.nc'
filenamea = 'gatescan.nc'

# Read the zero bias calculation
device_configuration = nlread('InAs_5nm_pin.nc', DeviceConfiguration)[0]

# Get the calculator
calculator = device_configuration.calculator()

# Set the source-drain voltage of the calculator
calculator=calculator(electrode_voltages=(0*Volt, 0.5*Volt))

# Get the metallic regions
metallic_regions = device_configuration.metallicRegions()
# Define positive bias voltages
gate_voltage_list=numpy.arange(10)*0.1*Volt

#make loop
for gate_voltage in gate_voltage_list:
    # Change the gate voltages
    new_regions = [m(value = gate_voltage) for m in metallic_regions]
    device_configuration.setMetallicRegions(new_regions)

    # Set new calculator with modified electrode voltages on the configuration
    # use the self consistent state of the old calculation as starting input.
    device_configuration.setCalculator(
          calculator(),
          initial_state=device_configuration)
    device_configuration.update()
    nlsave(filenamec, device_configuration)

    electrostatic_difference_potential = ElectrostaticDifferencePotential(device_configuration)
    nlsave(filenamea, electrostatic_difference_potential)

Petr Khomyakov:
Regarding just plotting example, I refer to the python script plot´-iv-curve.py enclosed to that tutorial.

tara95:
thanks.
please can you guide me?
 I attach two python scripts  to get I-Vg curve at drain bais 0.5 v. Is the python scripts  correct?

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