# Questions tagged [density-of-states]

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### DOS of swave superconductor for nonzero chemical potential and existence of Andreev bound state

I keep getting something, which I thought was wrong, but now I am thinking maybe not. The issue I am dealing with has to do with the DOS and a nonzero $\mu$. To begin let's note that the peak found in ...
0answers
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### Isothermal Gruneisen parameter for Germanium?

If phonon density of states peak shifts are purely quasiharmonic, we have $\omega$(V(T)). If phonon density of states peak shifts shifts are purely anharmonic, we have $\omega$(T). Does anyone know if ...
1answer
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### Recent review on high density equation of state?

Can anyone suggest a recent review on the equation of state of the matter at high (nuclear and above) densities? I would like this review to contain both astrophysical applications, mainly for neutron ...
0answers
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### Double and triple sum into integral with density of states

I asked this on mathematical forum section. I'm triying to expand the results of certain calculation, where the author has the following kind of sums: $$\sum_{j} A(\omega_j) n(\omega_j),$$ where $A$ ...
1answer
28 views

### Normalization of phonon density of states

Analogous to electronic structure calculations, we can solve for dispersion band structure of phonons for lattices using harmonic lattice approx. And we can find the so-called phonon density of states ...
3answers
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### Canonical ensemble: what if the phase space density is not known?

In canonical ensemble, the probability is defined as \begin{equation} P(E)=\frac{g(E)\exp(-E/T)}{Z}, \end{equation} and the partition function is defined as \begin{equation} Z(T)=\int_0^{\infty}dE\,g(...
1answer
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### Density of states of one classical harmonic oscillator

I have to determine the density of states of one tridimensional harmonic oscillator. I have to prove that the expression is the following $D(E) = aE^2$, a is a constant. I know this is a 6-dimensional ...
0answers
38 views

### Ideal gas partition function

I am studying how to calculate the density of states and the partition function of $N$ non-interacting particles. My question is why the integral of the momentum, in the density of states calculation, ...
1answer
149 views

### Longitudinal conductivity from density of states (DOS)

It is well-known that using the so-called Streda formula, the transversal conductivity $\sigma_{xy}$ and thus the Hall conductivity in a two-dimensional material is given as the derivative of the ...
1answer
38 views

### The range of velocity in Maxwell Velocity Distribution [closed]

If we see the formula for velocity distributions in x,y, and z-direction their range of velocity goes from -infinity to +infinity but when we take the whole velocity distribution, the range goes from ...
1answer
78 views

### Density of states in a 1D infinite potential well [closed]

The question I have is how would I go about finding the density of states $\frac{dn}{dE}$ of an electron in a 1D infinite potential well with a width of $a$? I'm only just starting my quantum physics ...
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### Density states of Cooper pairs

In superconductivity we can treat the electrons of a Cooper pair as a boson and electrons can occupy the same energy level. But for temperatures above $0$ K and below $T_c$ not all electrons will be ...
0answers
108 views

### Density of state of a 2D harmonic oscillator

I tried to find the DOS of a 2D harmonic oscillator using $2$ different methods but the results aren't the same. The energy spectrum is: $$E_n=\hbar\omega(n+1)\tag{1}$$ and the degeneracy of the $n$-...
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378 views

1answer
134 views