[Pw_forum] confused about the unit of esm

[Jiayong Zhang]

I found this from
http://www.quantum-espresso.org/wp-content/uploads/Doc/INPUT_PW.html:

*Amplitude of the electric field, in ***Hartree*** a.u.; 1 a.u. =
51.4220632*10^10 V/m.*


Hope it can be helpful.



On Wed, Sep 13, 2017 at 10:48 AM, balabi <balabi at qq.com> wrote:

> Dear developers,
>     In the input_pw.html, item , it is said that "...... the magnitude of
> the electric field [Ry/a.u.]......". I got confused with this. I thought Ry
> is energy and a.u. is length, then Ry/a.u. is force. How could it be
> electric field?
>
> best regards
>
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