Messages

1

General Questions and Answers / Re: This kind of device structure is Scientifically feasible for Quantum Atk?

« on: May 6, 2025, 06:32 »

Hello, I would like to ask, RIDS current unit is uA / um, need to use the current value divided by the width of the A direction. The current obtained in the calculation of the ring gate nanotubes needs to become uA / um. Is it divided by the width of the A direction ? If not, which length should be divided by ?

2

General Questions and Answers / Re: "optimizedeviceconfiguration" module does not have an output file.

« on: May 6, 2025, 05:30 »

I add nlasve at the end of the script and save the file to the new file name ( optdevice2.hdf5 ), but there is only the initial unoptimized structure in the new file, and there is no optimized HDF5 file.

3

General Questions and Answers / Re: "optimizedeviceconfiguration" module does not have an output file.

« on: April 30, 2025, 05:20 »

Dear Anders Blom,
Thank you very much for your response. When I try to open the optimizedeviceconfiguration in my HDF5 file, it shows an error. However, I have never encountered this type of issue before. I hope you can assist me with this.

Best regards.

4

General Questions and Answers / Re: Change the temperature of the device.

« on: April 18, 2025, 03:14 »

Dear Expert,

I have a question regarding the temperature-related parameters. As shown in Figure 1, does the term "broadening" here refer to Fermi broadening? Additionally, in Figure 2, does "Electrode temperature" indicate the temperature of the device?

If I aim to simulate the IV curves of a device at different temperatures (considering the impact of temperature on transfer characteristics), should I primarily adjust the "Electrode temperature" parameter?

Thank you for your guidance!

5

General Questions and Answers / "optimizedeviceconfiguration" module does not have an output file.

« on: April 16, 2025, 07:54 »

Hi everyone, I hope you can help me resolve this issue.
When using the "optimizedeviceconfiguration" module for device optimization, the optimized device model is missing from the HDF5 file. I'm not sure what the problem is—could it be that I missed something during the setup?
Please help me take a look. Thank you for your help!

6

General Questions and Answers / Re: Anders Blom

« on: March 26, 2025, 11:54 »

Dear Anders Blom,

The HDF5 file I need to share is quite large in size, making it difficult to upload via the forum. Would it be possible for you to provide an email address where I can send the compressed file directly? Your assistance would be greatly appreciated.

Thank you for your support.

7

General Questions and Answers / Re: Anders Blom

« on: March 17, 2025, 11:21 »

Dear Mr. Anders Blom,

Thank you for your prompt response. Following your recommendations, I have carefully adjusted the convergence criteria in the test script to 1e-6 and conducted renewed validations. The updated script file is attached to this email. However, the test results remain largely consistent with previous data and did not yield the expected improvements.

I would be most grateful if you could investigate the root cause of this issue when convenient. Should you require any supplementary materials or additional test data, please do not hesitate to let me know.

Wishing you continued success in your work and good health.

8

General Questions and Answers / Why does the IVCharacteristics script produce different results compared to manu

« on: February 27, 2025, 05:58 »

Hello, I encountered an inconsistency when using QuantumATK with the same device model. The data calculated using the IVCharacteristics script shows significant discrepancies compared to results obtained by individually setting each gate voltage with the same basis set. Attached are my IVC script, the loop script for separate gate voltage configurations, and the computational result graphs. Could you please help me identify what might be causing this issue? Thank you.
Additionally, my alternative approach involves first using the test script to calculate the SCF (self-consistent field) of the device, then employing the TE script (Transmission Eigenchannel) to extract the current information of the device.