QuantumATK Forum

QuantumATK => General Questions and Answers => Topic started by: bfazi on March 14, 2015, 12:41

Title: IV-Curve
Post by: bfazi on March 14, 2015, 12:41

Hello every one

When we want to calculate IV-Curve, in input file, we must determine the energies for which the IV curve transmission spectra should be calculated. My question is, What is the correct energy range?

For example, in "GrapheneDevice" tutorial, the energy range was considered {-2, 2] eV. Why?
Which parameters are important to select the best range? (VD or VG or other parameters)
How can I select the best range?

Title: Re: IV-Curve
Post by: zh on March 16, 2015, 01:56

The default setup for the parameter "energies" in "IVCurve()" should be OK, i.e., energy range that covers the (source-drain) bias window.  You can also specify a large energy range, and the resulted increase in the computational cost is negligible.

The VD is more relevant to the choice of the energy range in "IVCurve()".

Title: Re: IV-Curve
Post by: zh on March 16, 2015, 23:54

"the current ...., divided by I/0 (current-zero)."
The above description is not clear to me. Please give the source of a published paper which presents those results.

Title: Re: IV-Curve
Post by: zh on March 17, 2015, 01:51

The definition of I_0 is not given in that paper. So this paper is not a good source. You had better first dig into literature to understand what is the meaning of I_0.  Even in the paper (ref.21, i.e., J. Appl. Phys. 104, 123709 (2008)) cited by your mentioned one, there is also no definition of I_0.