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Posted: **Tue Jun 24, 2008 3:14 pm**

Hi...
For berry phase calculations I got the following results in the OUTCAR file. Can any one please let me know what does "c" imply here?

Berry-Phase term: <R>bp
<R> = ( -2.34705, 0.00000, 14.17450 ) electrons Angst
+( 5.44222, 0.00000, -32.86715 ) *c

Thanks in anticipation
Regards
Amritendu
<span class='smallblacktext'>[ Edited ]</span>

Posted: **Tue Jun 24, 2008 8:05 pm**

this line is the lattice vector AIGPAR multiplied with the spin multiplicity of the bands. Please check it to remove possible unphysical contributions to the Berry phase terms caused by the periodic boundary conditions.

Posted: **Tue Oct 07, 2008 5:58 am**

What does an 'unphysical contribution to the berry phase term' look like, in this line?

Posted: **Tue Oct 07, 2008 2:36 pm**

it would be an integer multiple of the second line ( )*c included in ,.