What is the Fermi surface
What is the Fermi surface?
What is the Fermi surface? I hope this question is not too basic for this forum and I apologize in advance if it is.
Allow me to explain my confusion. I think I have a feel for the Fermi level. For example, I can understand it as a characteristic parameter μ in the Fermi-Dirac distribution of the energy levels for the electrons in the system:
The definition of the Fermi surface, on the other hand, is usually given as "isosurface of states with an energy equal to the Fermi level" in the three-dimensional space of wave vectors k, for example in this Wikipedia article:
In other words, it is defined as such k such that
One situation seems simple, namely a Fermigas with identical particles. Then
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