Messages

1

General Questions and Answers / Re: Width variation of phosphorene and energy gap

« on: March 27, 2016, 02:38 »

Dear zh,
 
First of all, thank you for your reply. If I am supposed to increase the number of atomic layer of phosphorene, does it mean that I am increasing its thickness? If that is so, it means that I am changing the thickness, not the width. Am I wrong?

However, I will try according to your suggestion.

Thank you. 

2

General Questions and Answers / Width variation of phosphorene and energy gap

« on: March 25, 2016, 06:44 »

Dear all,

I had varied the width of phosphorene by changing the repetition number in b or c direction. However, the energy band gap does not change. Supposedly, according to other published papers, the energy band gap decreases as the width increases. Anyone know what is wrong?

Thank you in advanced for your response.

3

General Questions and Answers / Computed multigrid residual greater than required accuracy

« on: October 27, 2015, 03:53 »

Dear all,

I am running phosphorene FET. However, while running its IV characteristics, a warning as stated in the title, "THE COMPUTED MULTIGRID RESIDUAL IS GREATER THAN THE REQUIRED ACCURACY" came upon in the Log Window. I would like to know, what is this about? It seems like my simulation has stopped running since the Log Window did not move. However, from the Job Manager, the simulation is still running. Should I terminate this simulation or not? Attached is my ".py file", the screenshot of the Log Window to show that the simulation has stopped running and the screenshot of the Job Manager to show that the simulation is still running.

Thank you in advance for your quick response.

4

General Questions and Answers / Re: IV of phosphorene FET

« on: October 6, 2015, 03:51 »

Thank you very much Sir for your reply. I really appreciate it.

5

General Questions and Answers / Re: IV of phosphorene FET

« on: October 5, 2015, 05:01 »

Dear Sir,

Attached is my phosphorene FET. Is the k-point sampling above correct?

6

General Questions and Answers / Re: IV of phosphorene FET

« on: October 4, 2015, 09:55 »

Dear Sir,

I would like to confirm on the k-point sampling for phosphorene. Since my phosphorene is a two-dimensional, the k-point chosen should be in two directions. Is it correct if I put the setting like this?

7

General Questions and Answers / Re: IV curve

« on: September 20, 2015, 06:00 »

about charge transfer? how to calculate it?

8

General Questions and Answers / Re: IV curve

« on: September 20, 2015, 05:13 »

Hi,
I attach the script that you would be helpful for you

What i meant about the IV which is different with others, is that this the first type of trend that i achieved. Therefore i am not sure whether it is acceptable or not.?

Thank you.

9

General Questions and Answers / IV curve

« on: September 15, 2015, 04:16 »

Hi everyone,

From the attachment below, i got trend of IV curve different with others.
Is this kind of trend acceptable? or there is something wrong with method that i used?

10

General Questions and Answers / Re: Gas Molecule Attachment

« on: September 8, 2015, 05:49 »

Orite, thank you so much both of you 

11

General Questions and Answers / Re: Gas Molecule Attachment

« on: September 7, 2015, 07:09 »

It is possible if  i used O-O molecule but the atoms are separated.. are they still called oxygen gas molecule?

from previous figure the oxygen atom are still bonded with each other.

12

General Questions and Answers / Gas Molecule Attachment

« on: September 6, 2015, 09:36 »

Hi everyone,

I have used gas molecule like oxygen gas to attach on surface of graphene.
however, i need confirmation about the method that i used.
It is correct just simply drag O2 molecule onto graphene?

Then, I attach the figures to make it clear...

13

General Questions and Answers / Carbon Nanotube Floating Gate Device Simulation

« on: September 2, 2015, 10:45 »

Dear all,

I'm working on a floating gate device using CNTFET. I would like to know whether QuantumWise can simulate such device?

14

General Questions and Answers / Re: IV of phosphorene FET

« on: August 9, 2015, 02:39 »

Dear Sir,

Thank you for your reply. I will try to simulate the structure according to your suggestions. Thank you so much.

15

General Questions and Answers / IV of phosphorene FET

« on: July 29, 2015, 04:55 »

Dear all,

I have simulated the IV curve for a phosphorene FET. As far as I understand, the IV curve was supposed to be an Id versus Vd graph. However, the trend of the graph was similar to the Id versus Vg graph.

Am I correct, or the graph was actually an Id versus Vg graph?

If I am correct, why was the trend similar to the Id versus Vg graph?

Here, I attached the python file and the IV plot.

Thank you in advance for your cooperation. I am really sorry for asking this question again.