Condensed matter Physics 2

Quiz by joshwilliams02
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Last updated: May 14, 2023
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First submittedMay 14, 2023
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Hint
Answer
majority carrier diffuse into minority region and recombine with majority carriers
diffusion current
surface in reciprocal space that separates filled and unfilled states at absolute zero
fermi surface
adding/removing an electron from a semi conductor
doping
any solid with a repeated structure
crystal
region about a lattice point that is closer to that lattice point than any other
Wigner seitz cell
a vector that describes the translational periodicity of a lattice
lattice vector
no 2 electrons can share the same set of quantum numbers
pauli exclusion principle
apparent mass of a particle when responding to forces
effective mass
the eigenfunction of the wave equation for a periodic potential is the product of a plane wave and the potential that has the periodicity of the crystal
bloch's theorem
thermally generated minority carriers drift into the majority region, swept by built in e field
drift current
total relaxation times is dependent on different sources (defects, impurities and phonons)
Matthiessen rule
the highest occupied electron state at absolute zero temperature
fermi energy
assuming scattering times are the same, 2 transport processes are only different by heat capacity and charge
wiedemann-franz law
amount of energy a material can store per kelvin
heat capacity
Hint
Answer
a pair of p-n junctions
transistor
electrons and holes recombine with each other resulting in no net charge carriers
depletion region
empty state in valence band due to excitation of an electron into the conduction band
hole
union of electron and hole to return to a neutral state
recombination
requires high energy phonons, direction of total linear momentum is reversed, responsible for heat resistance
umklapp process
incomplete band filling creates a Fermi surface, electric field shifts Fermi surface so not as many electrons are moving to the left as the right
metal
a quantum of energy
phonon
one atomic species is swapped for another
substitution
total linear momentum conserved, no heat resistance
normal process
ability of a charge carrier to move through a material in response to an electric field
carrier mobility
distance between fermi level and vacuum level
work function
in a filled band as many electrons move to the left as to the right
insulator
equivalent to a Wigner Seitz cell in reciprocal space
Brillouin zone
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