Yambo Community Forum

Dear developers:
I note that in yambo, the r_setup file, the following unitcell constant :

[02] Input variables setup
==========================


[02.01] Unit cells
==================

Unit cell is Unknown

... containing 7N7B4H atoms

... with scaling factors [a.u.]: 16.56000 94.52448 52.92576

but in my PWSCF out file, the constant is:celldm(1)=8.280,celldm(2)=5.708, celldm(3)=3.196,it seems in yambo, the cell constant are enlarged by two times!
I don kown what is the "caling factors [a.u.]: 16.56000 94.52448 52.92576"
Thanks!

sdwang wrote:I don kown what is the "caling factors [a.u.]: 16.56000 94.52448 52.92576"

Dear Shudong Wang,

You have to scale the Direct Lattice(DL) unit cell A1, A2, A3 (in irreducible unit) by the scaling lattice to get them in a.u.

then you should compare the A1, A2, A3 vectors with those in PWscf (mind the units)

Regards,
Myrta