Messages

16

Scripts, Tutorials and Applications / Re: Analyzer script for calcualting Current vs. Gate Voltage variation.

« on: May 19, 2012, 18:39 »

Thanks Blom for reply !!
I think I'll have to do everything manually then 

17

Scripts, Tutorials and Applications / Analyzer script for calcualting Current vs. Gate Voltage variation.

« on: May 18, 2012, 13:20 »

I have generated a netCDF file that only has different gate voltages and corresponding transmission spectrums. I want to plot current vs. gate voltages plot at certain electrode potentials. Can we make such an analyzer's script that does this?
I tried to plot it using default Analyzer's I-V curve but since the voltages of left and right terminals are fixed therefore ATK could not plot the current variations.

18

General Questions and Answers / Analysis for finding out the Hybridization state ?

« on: May 5, 2012, 18:05 »

I am wondering if there is any analysis in ATK by which we can tell the Hybridization state, i.e. whether it is sp, sp2, or sp3 hybridized.
Because this really helps in developing the intuitive understanding of the electronics properties of bulk/device.

19

General Questions and Answers / Re: Locating the position of certain band (from band str.) in bulk config?

« on: May 4, 2012, 13:54 »

Thanks Anders for correcting the figure. It certainly solved my problem. 

20

Scripts, Tutorials and Applications / Boundary Conditions for above and below the gate for my DEVICE?

« on: May 4, 2012, 07:29 »

Can anyone tell me the general criteria for about the boundary conditions for device with gate enabled? I am using the Boundary condition as shown in the attached file corresponding to my device geometry. Is it correct ?
Can you please tell me the effect of dirichlet boundary conditions at the top of the gate (top(B)) and dirichlet at the bottom(bottom(B))?

21

General Questions and Answers / Re: Locating the position of certain band (from band str.) in bulk config?

« on: May 4, 2012, 06:02 »

Sorry for confusing You !!
I meant the one similar to shown in Figure 3 of attached file. 

22

General Questions and Answers / Locating the position of certain band (from band str.) in bulk config?

« on: May 3, 2012, 16:59 »

Is it possible to determine the location of the particular band from band structure in the bulk configuration?

23

General Questions and Answers / Re: regarding gate design

« on: May 3, 2012, 16:37 »

1. The work function of the metalic region will determine where is the zero value of the gate potential. Thus, the effect of the work function is to shift the gate potential by a constant. You cannot set this parameter, and you need to make such corrections as post analysis. 
I.e. work function of electrode is 4 eV, work function of gate is 5 eV, then you must add -1 V to you gate potential axis as post analysis.

2. You can set this parameter in the script generator tool in vnl, see forinstance the graphene device tutorial or the ATKDeviceTutorial

Can you please tell me how to determine the work function for electrode and gate for performing such post analysis 
-- Thank you

24

Scripts, Tutorials and Applications / Determining Work Function of Metallic/Dielectric Regions for Gate?

« on: May 2, 2012, 18:55 »

Can someone tell me how to determine the work function of Metallic/Dielectric Regions used in Gate?

-- Thankyou