# Solid state

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The energy required to change some body(mole, gram, cm^3) by some delta T.
Heat capacity
A model for heat capacity 1. Treat each atom as an isolated harmonic oscillator and all atoms vibrate at the same frequency (w0) [this is wrong] 2. is population distribution. (phonos act like boson) 3. C=dU/dT 4. High T limit, right, Low limit, wrong
Heat capacity of Einstein model
A model for heat capacity 1. an atom is a harmonic oscillator 2. linear and isotropic dispersion of frequency of phonons 3. High T limit 3kb, Low limit T T^3
Heat capacity of Debye Model
1. Solid is period 2. traveling was solution has peridic boundary condition
Bloch theorem
Periodic boundary condition which impose the restrictiin that a wave function must be periodic on a certain Bravais latticr
Born-von Karman boundary condition
The trial wave-function will always give an expectation value larger than or equal to the ground-energy.
Ritz variational medthpd, Ritz principal
plasma frequency
Lorentz Drude model
Lorentz Drude model
drude hall effect
drude hall effext
hall resistivity
hall resistivity
Larmor cycle
Larmor cycle
bravais lattice
bravais lattice
primitive cell
primitive cell
wigner seitz cell
wigner seits cell
cristallographic restriction theorem
cristallographic restriction theorem
billouin zone
billouin zone
quasi momentum operator
quasi momentum operator
dirac point
dirac point
van Hove singularity
van Hove singularity
Born Oppenheimer approximation
Born Oppenheimer approximation
Slater determinant
Slater determinant
jellium minium
jellium minium
Those transitions are those that involve a latent heat. During such a transition, a system either absorbs or releases a fixed (and typically large) amount of energy per volume.
First order phase transitions
Those phase transitions are also called "continuous phase transitions". They are characterized by a divergent susceptibility, an infinite correlation length, and a power law decay of correlations near criticality.
Second order phase transition
This magnetism refers to materials that are not affected by a magnetic field.
Diamagnetism
This magnetism refers to materials like aluminum or platinum which become magnetized in a magnetic field but their magnetism disappears when the field is removed.
Paramagnetism
This magnetism refers to materials (such as iron and nickel) that can retain their magnetic properties when the magnetic field is removed.
Ferromagnetism
Kirchhof law
Kirchhof law