QuantumATK Forum

QuantumATK => General Questions and Answers => Topic started by: Sarvesh Agarwal on June 4, 2013, 21:27

Title: Forward and Reverse Biasing a Device
Post by: Sarvesh Agarwal on June 4, 2013, 21:27

Hello
 I have to calculate  the i-v characteristics for positive bias (0 to 1 V) and I used the " for bias in numpy.linspace(0.,1,10)*Volt:" command
but in the analyzer panel its showing the i-v characteristics for negative bias (-1 to 0 V) why this is happening please explain..? 

Title: Re: Forward and Reverse Biasing a Device
Post by: kstokbro on June 5, 2013, 11:13

This is due to the definition of the forward and reverse bias direction in ATK.
see http://www.quantumwise.com/documents/manuals/latest/ReferenceManual/index.html/ref.transmissionspectrum.html

In short, positive current direction is left to right, means Vbias = Vleft -Vright,
i.e. if you apply the potential to the left electrode you bias will correspond to the applied potential.

Title: Re: Forward and Reverse Biasing a Device
Post by: Sarvesh Agarwal on June 6, 2013, 12:18

Ohhh..ok ok I got that, I am biasing the device right to left..
        " calculator(electrode_voltages=(-0.5*voltage,0.5*voltage))"... thats why I was getting negative voltage and current...
thanks sir.. :)