Hello,
In yambo implementation, to build the electron-hole exchange kernel V, the G=0 term is disregarded. However, from literatures, this term is responsible for the longitudinal-transverse splitting. I'm wondering why the G=0 term is omitted in the implementation.
Best,
The G=0 term in electron-hole exchange interaction
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The G=0 term in electron-hole exchange interaction
Xiaoming Wang
The University of Toledo
The University of Toledo
- claudio
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Re: The G=0 term in electron-hole exchange interaction
Dear Xiaoming Wang
there is the possibility to include or exclude the G=0 in the BSE,
depending if you want only longitudinal or also transverse excitons
using the flag:
Lkind= "Lbar" # [BSE] Lbar (default) / full
in order to activate this flag use the verbosity -V resp when you generate the BSE input.
best
Claudio
there is the possibility to include or exclude the G=0 in the BSE,
depending if you want only longitudinal or also transverse excitons
using the flag:
Lkind= "Lbar" # [BSE] Lbar (default) / full
in order to activate this flag use the verbosity -V resp when you generate the BSE input.
best
Claudio
Claudio Attaccalite
[CNRS/ Aix-Marseille Université/ CINaM laborarory / TSN department
Campus de Luminy – Case 913
13288 MARSEILLE Cedex 09
web site: http://www.attaccalite.com
[CNRS/ Aix-Marseille Université/ CINaM laborarory / TSN department
Campus de Luminy – Case 913
13288 MARSEILLE Cedex 09
web site: http://www.attaccalite.com
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- Posts: 67
- Joined: Fri Dec 18, 2020 7:14 am
Re: The G=0 term in electron-hole exchange interaction
Dear Claudio,
Thanks for your quick reply.
Best,
Thanks for your quick reply.
Best,
Xiaoming Wang
The University of Toledo
The University of Toledo
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- Posts: 67
- Joined: Fri Dec 18, 2020 7:14 am
Re: The G=0 term in electron-hole exchange interaction
Hi Claudio,claudio wrote: ↑Tue May 11, 2021 9:40 pm Dear Xiaoming Wang
there is the possibility to include or exclude the G=0 in the BSE,
depending if you want only longitudinal or also transverse excitons
using the flag:
Lkind= "Lbar" # [BSE] Lbar (default) / full
in order to activate this flag use the verbosity -V resp when you generate the BSE input.
best
Claudio
The G=0 term is direction dependent. for Lkind="full", which parameter controls the polarization direction? Is it BLongDir?
Best,
Xiaoming
Xiaoming Wang
The University of Toledo
The University of Toledo