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berry phase of polarization

From: "Chun Li " <chun.li@mf.mpg.de>
To: <forum@abinit.org>
Subject: berry phase of polarization
Date: Thu, 9 Dec 2004 19:00:00 +0100
Importance: Normal

Dear ABINIT developers and users,

I have two questions: 1) Are there any articles or materials describing
the specific formulas used in the Berry phase method in ABINIT? I want
to know the specific procedure.
2) I want to know if the Born effective charge tensor can be obtained
through usual calculations (not RF) in ABINIT.

Thank you very much.

Chun Li

berry phase of polarization, Chun Li , 12/09/2004