Displacement of Cubic Approximation

[zohansyahfatomi]

Dear Prof. Tadano,

How much is the cubic displacement if I have a harmonic displacement of 0.01 Angstrom?
Is it twice the harmonic displacement? So, it will be 0.02 Angstrom?
Because I checked the tutorial for Silicon, it is twice:
harmonic : 0.02 Angstrom
cubic : 0.04 Angstrom
Thank you very much.

Best regards,
Zohan

https://alamode.readthedocs.io/en/latest/tutorial_pages/silicon.html

[ttadano]

The magnitude of 0.03-0.05 is usually good, but please check how this value influence the final result by yourself.

[zohansyahfatomi]

Thank you very much.