Charge Density calculation on Silicon surface

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physicsirl
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Joined: Fri Feb 22, 2013 8:06 pm

Charge Density calculation on Silicon surface

Post by physicsirl » Fri Feb 22, 2013 8:15 pm

Hi there

As a test calculation I have relaxed a Silicon slab with vacuum to confirm the Si(001)-(2x1) surface reconstruction. I have also calculated the projected band structure around the reduced Brillouin Zone for this structure, showing the presence of surface states. Now is it possible to select a band that represent one of the surface states and calculate the charge associated so as to produce the contour lines around the atom. Can someone help me with this.

I can use cut3d to show the total charge density distribution but am unsure if I can select a certain band.

Best wishes

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

Re: Charge Density calculation on Silicon surface

Post by jzwanzig » Sat Mar 30, 2013 11:38 am

From cut3d you can select any given band at any kpt that you want, and save in various formats. Of course you have to tell it which band you want to save, I usually end up saving a few near the band edge and plotting them (in xcrysden), then I begin to a get a feel for the system.
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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