How to calculate dielectric constant in different directions, x and y

[Harshita]

I am using Yambo code for optical properties using GW+BSE, I am able to calculate the imaginary part of the dielectric constant following https://www.yambo-code.eu/wiki/index.ph ... al_systems
Can anyone tell how to calculate dielectric constant in different directions, x and y?

[Daniele Varsano]

Dear arashita,

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The polarization is indicated in input by the variable:

Code: Select all

BLongDir

1 | 0 | 0

and

0 |1 | 0

provides respectively the x and y direction.

It can be useful to have a look at the Yambo cheatsheet for the meaning of variables.

Best,
Daniele