Talk:Fermi surface

I think a good start for the first sentence would be: "In condensed matter physics, the Fermi surface is the isoenergetic surface (a surface where the energy is constant) in reciprocal space that contains the highest energy electrons at zero temperature Rafaeldelgrande

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The first sentence "In condensed matter physics, the Fermi surface is the surface in reciprocal space which separates occupied from unoccupied electron states at zero temperature." is just plain wrong. Even at k-points outside of the Fermi surface states will be occupied. Just less occupied.

Two points of note: I have taken the liberty of removing the "stub" designation; I have reused my figure from "spin density wave." I would have made a new figure for this article, but off the top of my head couldn't come up with anything better anyway. -- Alison Chaiken 03:05, 26 December 2005 (UTC)[reply]

Just a question: why isn't there a "+ 1" in the denominator of the first equation? JMB3501 (talk) 21:16, 4 November 2009 (UTC)[reply]

Useful in semiconductors?

If the Fermi level is inside a band gap, as in a semiconductor, doesn't that mean that the Fermi surface is empty or nonexistent? --Nanite (talk) 12:41, 15 June 2013 (UTC)[reply]

Yes. Only metals do have a Fermi surface. In fact ‘material with a Fermi surface’ is one physically consistent definition of a metal. — Preceding unsigned comment added by Hinkeldörnchen (talk • contribs) 05:46, 8 September 2016 (UTC)[reply]

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