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- W1998832381 abstract "Using the Hubbard model including weak electron-phonon coupling the electrical conductivity σ is calculated for U ≫ t (U intra-atomic Coulomb energy, —t nearest-neighbour hopping integral) and low frequencies. Especially the dc conductivity is investigated for the half-filled band and T ≫ TD (TD Debye temperature). It is compared with the dc conductivity in the phononless Hubbard model calculated in the approximation lim (σ/t2). The inclusion of phonons results in t → 0 a finite transport relaxation time the temperature dependence of which leads to a shift of the conductivity maximum temperature to a lower value, the sharpening of the maximum, and to the decrease of the conductivity for high temperatures according to T−2. [Russian Text Ignored]." @default.
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- W1998832381 date "1977-04-01" @default.
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- W1998832381 title "Electrical Conductivity in the Hubbard Model Including Electron-Phonon Interaction" @default.
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- W1998832381 doi "https://doi.org/10.1002/pssb.2220800225" @default.
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