Dear Fedor,
thank you for your message. I have found a (fairly OK) solution to applying
higher fields that seems to work OK with graphene and is actually described
in example 10 of PW but I think the sample does not apply the technique. I
quote:
"To perform a calculations with an electric field,
Dear all,
a happy new year!
I have recently played with 2-D materials (yes, graphene) and electric
fields. I encountered several situations where convergence is really hard
to achieve and I was wondering which of the following parameters is usually
considered to be helping with convergence
