Input file for determining elec. band structure of a metal

Total energy, geometry optimization, DFT+U, spin....

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brehmj
Posts: 35
Joined: Thu Jan 20, 2011 3:18 pm

Input file for determining elec. band structure of a metal

Post by brehmj » Mon Apr 02, 2012 3:09 am

Hi.

I see that Lesson 3.5 of the tutorial gives values for variables for the electronic band structure of an insulator.

Is there anything different I have to do for a metal?

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jzwanzig
Posts: 504
Joined: Mon Aug 17, 2009 9:25 am

Re: Input file for determining elec. band structure of a met

Post by jzwanzig » Mon Apr 16, 2012 4:20 pm

Not really, although you may need a very dense k point mesh to compute the Fermi surface accurately, and also you should probably compute the ground state in two steps: 1) self-consistently, using tolvrs 1.0D-18, and then non-self-consistently, with tolwfr 1.0D-20, and THEN do the individual k points (also non self consistently as usual) to map out the band dispersion.
Josef W. Zwanziger
Professor, Department of Chemistry
Canada Research Chair in NMR Studies of Materials
Dalhousie University
Halifax, NS B3H 4J3 Canada
jzwanzig@gmail.com

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