[Pw_forum] external electric field

Stefano Baroni baroni at sissa.it
Tue Jul 8 08:06:22 CEST 2008

a "sawlike" potential is not homegeneous! as simple as that ...
the first is implemented as a regular potential, the second using  
Berry's phases and constrained optimization, following ideas from  
Resta, Vanderbilt, Umari-Pasquarello among others

Cheers - SB

On Jul 8, 2008, at 11:19 AM, alan chen wrote:

> Dear PWSCF users,
>        I know this question might be too general but I just want to  
> give a try.
>        In PWSCF, there are two options for external field. One is  
> 'tefield' to simulate a sawlike potential, the other is 'lelfield'  
> to simulate a homogeneous electric field. Could you tell the  
> difference between these two options? Or can you link me to some  
> useful references about how to use these two types of external field?
>        Thank you very much.
> Hanghui
> Department of Physics,
> Yale University
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Stefano Baroni - SISSA  &  DEMOCRITOS National Simulation Center -  
http://www.sissa.it/~baroni / [+39] 040 3787 406 (tel) -528 (fax) /  
stefanobaroni (skype)

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de la pensée - Jean Piaget

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