The ABINIT Users Mailing List ( CLOSED )

[PGanesh <pganesh@ciw.edu>]

Hello,

I am a relatively new user of Abinit. To compute polarisation using the 
berry's phase approach Abinit uses two methods, one with positive value 
of the variable 'berryopt' and another (which is claimed to be an 
improved method) with a negative value.  Can anyone give me pertinent 
references so I can understand these two methods, especially the 
improved one? 

Thanks in advance.

-P. Ganesh