EPW Forum

Dear Mikhail,
I have encountered the same problem as you. The negative gap energy exits in higher temperatures. Wannier functions are good. Is it feasible to increase the value of "wscut"? Can you tell me how to solve this problem?

Thank you!
Best,
mxh

Dear Sabya,

Thanks a lot!

Best regards,
mxh

Dear EPW developers and users,

In EPW 5.8, the system_ 2D flag becomes available, but system_ 2D =. true. is invalid. In the manual, regarding the system_2D description is shown in the picture. If we study materials like graphene and MoS2, How to set up system_ 2D?

sincerly,
mxh

Dear Dr. Lee, When encountering the error message "Error in routine wigner_seitzkq (1): weights do not add up to nc1nc2nc3," you mentioned adjusting the threshold of the "DO WHILE (ABS(dist(i) - mindist) < eps6 .AND. i < 125)" condition. Specifically, which parameter should be modified, and after ...

Hi qiaoqiao66, I also have a same issue. The electron-phonon coupling strength is very strange, about 1000. I adjusted "fsthick", wscut" and" muc", and the electro-acoustic coupling was reduced to 283. Obviously, this value is still very strange. Have you solved your problem? How do you solve it ...

This is my input file. &inputepw prefix = 'prefix' outdir = './tmp' amass(1) = xxx amass(2) = xxx amass(3) = xxx dvscf_dir = '../phonon3/save' ep_coupling = .true. elph = .true. epwwrite = .true. epwread = .false. etf_mem = 1 wannierize = .true. nbndsub = 8 bands_skipped = 'exclude_bands = 1-4' num ...

Dear Friends， I'm a newcomer to the EPW calculation, and I face an issue while doing EPW calculation. I use EPW and QE to calculate electron-phonon superconductivity of 2D materials. The electron-phonon coupling strength is very strange, about 1000. I adjusted "fsthick", wscut" and" muc" according t ...