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- W2004034583 abstract "If the electronic bandwidth is small compared to intrasite vibrational frequencies, an electron stays at a site over several vibrational periods and has a chance to modulate the frequency. The effects of the resulting electron-vibration coupling on the properties of a narrow half-filled Hubbard band of electrons are studied. At low temperatures, the principal effect is the alteration of the Mott-Hubbard gap. The high-temperature conductivity falls of as $frac{1}{{T}^{2}}$. The coupling breaks the particle-hole symmetry of the half-filled band and gives rise to a nonzero thermopower. If additional electrons on a site cause vibrational softening, the thermpower increases from zero with increasing temperature, reaches a maximum, decreases, changes sign and saturates. The relevance of these results to the tetracyanoquinodimethane salts is discussed." @default.
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- W2004034583 date "1976-02-15" @default.
- W2004034583 modified "2023-09-23" @default.
- W2004034583 title "Electronic modulation of vibrational frequencies: Effect on the conductivity and thermopower of a narrow Hubbard band" @default.
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- W2004034583 doi "https://doi.org/10.1103/physrevb.13.1805" @default.
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