# Questions tagged [fermi-energy]

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### Fermi energy lying in the forbidden gap

So, according to the my textbook(Fundamentals of physics by Halliday & Resnick), the Fermi level is the highest occupied level at absolute temperature ($T=0 K$) and the energy corresponding to it ...
18 views

### Interpretation of Floquet Band Structure in Multi-band Models

Computing band structures inside Floquet formalism has become quite common, see e.g. [1]. While I think to fully understand it from a mathematical point of view, I'm lacking some physical ...
• 85
1 vote
36 views

### Relation between Fermi surface and Fermi velocity

Is there a direct relation between the Fermi velocity and the Fermi surface? Can one reconstruct the Fermi surface if the full angular distribution of the Fermi velocity is known?
• 185
42 views

### Rewrite the derivative of Fermi-Dirac distribution [closed]

I find the derivative to the Fermi-Dirac equation as via my textbook and this can be rewritten to using the identities $2cosh(x)=e^{x}+e^{-x}$ and $4cosh^{2}(x)=e^{2x}+e^{-2x}+2$ but I just can't ...
48 views

### How many $\rm eV$ near Fermi level are involved to the conduction of carriers? For metal and degernerated semiconductors?

How many $\rm eV$ near Fermi level are involved to the conduction of carriers? For metal and degernerated semiconductors? Someone say about ± 5 eV, but I cannot find any references to support.
• 31
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### Relation of fermi level with conductivity of monovalent metals

I read somewhere that monovalent metals have a high population density near their Fermi surface because they have partially filled bands. Can someone explain why this is so?
• 1
14 views

### Fermi gas model of nucleus, specifically when the numberof neutrons does not equal Z

I am studying for a final for an introductory course in particle physics.(Undergraduate course) and while working though old final problems I found one part question which I could not figure out how ...
• 66
30 views

### Average electron density of a Free electron gas

I'm trying to solve solving an exercise in quantum mechanics, and began facing some confusion regarding the definition of average electron density. For a 2D free electron gas, under an open boundary ...
• 481