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Results tagged with solid-state-physics
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user 36793
Solid-state physics studies how macroscopic properties of solids (mechanical, electrical, optical, etc.) result from their microscopic structure. It usually deals with the scale where quantum properties of the particles are substantial.
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Why does the bulk of a superconducting material expel magnetic field but not that of a perfe...
It is well-known that when a superconductor (SC) is cooled below the transition temperature $T_c$, the magnetic field passing through the bulk of the SC is completely expelled. In Zee's book on Quantu …
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What is(are) the effect(s) of disorder on electrical conductivity?
As a non-specialist, I asked the question "What are disorders in condensed matter parlance?" about the meaning of disorder in condensed matter physics. I also wrote a non-specialist answer after some …
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Identifying transmission spectra of metal, insulator and semiconductors
How can one qualitatively distinguish between the transmission spectra of a metal, a semiconductor and an insulator which are all drawn on the same graph (transmittivity vs wavelength)?
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answer
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Can magnons or phonons exist at zero temperature?
Can in principle, magnons or phonons exist at zero temperature? If not, why? If yes, how?
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Why does the magnetization vanish in diamagnetic material in absense of an external magnetic...
Though essentially present in all substances, diamagnetism is a much weaker effect and therefore, often suppressed by relatively strong opposite effects, like paramagnetism. This effect is exclusively …
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What is the precise/defining mathematical behaviour for Meissner effect?
This video derives the Meissner effect $$\textbf{B}(x)=\textbf{B}(0)e^{-x/\lambda},$$ by reducing the equation, $$(\nabla^2-\lambda^{-2})\textbf{B}(\textbf{r})=0\tag{1}$$ into its one-dimensional coun …
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Phonons and heat conduction
I'm essentially going to explain what is explained in the video here though this answer does specifically refer to poor conductors.
There are two types of phonon-phonon scattering: normal scattering …
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2
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Why do naturally occurring ferromagnetic materials contain a large number of domains?
Why do naturally occurring ferromagnetic materials (e.g. a piece of iron) contain a large number of domains rather than a single domain, and hence, carry no net magnetization? So the question is basic …
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Understanding conduction as a dynamic process in time
In pure metals with perfect periodicity, the Bloch wavefunction representing an electron, is delocalized throughout the crystal for all times and is an eigenstate of the one-electron Hamiltonian. Ther …
- 27.2k
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Phonons and heat conduction
What is the physical picture of heat conduction in a poor conductor? In particular, I'm curious about the role of phonons in conduction in poor conductors. I know that phonons (within the harmonic app …
- 27.2k
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Symmetry Breaking And Phase transition
Is every phase transition associated with a symmetry breaking? If yes, what is the symmetry that a gaseous phase have but the liquid phase does not?
What is the extra symmetry that normal $\bf He$ ha …
- 27.2k
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The Lennard-Jones potential and the Pauli exclusion principle
The force between two atoms takes the generic shape of a Lennard-Jones potential. It has an attractive part caused by dipole-dipole attraction and a short-range repulsive part which is said to be caus …
- 27.2k
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Understanding heat conduction by phonons using phonon wavefunction?
The electrons in a perfect metal are described by Bloch waves having a particular form given by \begin{equation}\psi(\textbf{r})=e^{i\textbf{k}\cdot\textbf{r}}u_{n\textbf{k}}(\textbf{r}).\end{equation …
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Why are excitons not found in metals?
In this Wikipedia link, the definition of exciton is given by
An exciton is a bound state of an electron and an electron hole which are attracted to each other by the electrostatic Coulomb force. …
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Why does the free electron theory of metals work?
Free electron theory of metals works unreasonably well in spite of the fact that we neglect the Coulomb repulsion between the electrons. Is there deeper reason why this should work? Somewhere I heard …
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