Chemistry, 20.10.2019 09:30 millernicholas622
Now consider the quantum theory of conduction. at low temperatures, with scattering by lattice vibrations (phonons) not yet important, ~ t. the residual resistivity, 0, as t -> 0 (the text calls this “i ”) is dependent on scattering by defects (impurities, . if the lattice is ‘perfectly ordered’, then can approach infinity (or at least the size of the metal.) the residual resistivity is a measure of the purity of the sample. a relatively good sample of cu has 0=2 10-11m. a.) if the fermi velocity, uf, of cu is 1.57 106 m/s, and =2 10-11m, according to eq. 10-25 what is the mean free path in units of m? (assume cu is monovalent, i. e. each atom contributes 1 electron to the conduction.) (show how the units come out to give units of length in the end.)
Answers: 2
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Now consider the quantum theory of conduction. at low temperatures, with scattering by lattice vibra...
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