[Pw_forum] Phonon calculation using vdw-DF van der waals's correction

[Debnath Talukdar]

Dear QE users
Currently I am doing phonon calculation of bilayer germanene using
espresso-5.1 phonon package.  When I am use van der waals's effect through
exchange-correlation functional(using flag:input_dft='vdW-DF') all phonon
mode have imaginary frequencies.

Can anyone please let me know whether phonon with van der Waals functional
is implemented or not?

With regards
Debnath Talukdar
IISER Pune
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