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- W2089588393 abstract "The effects of intra (molecular) -site vibrations on the dc conductivity, thermoelectric power, and one-electron density of states are calculated and studied. The one-dimensional half-filled-band Hubbard model is coupled locally in space to phonons and the approximation used assumes that the electron bandwidth is small. The one-electron density of states is Gaussian broadened in energy, even for zero bandwidth and zero temperature. Consequently there is a finite density of states at the Fermi energy (in the Mott-Hubbard gap). As temperature increases, the separate peaks in the density of states become less discernible. The dc conductivity exhibits a rounded maximum as a function of temperature and falls off as ${T}^{frac{ensuremath{-}3}{2}}$ at high temperature. At very low temperatures, below a region of thermally activated behavior, the conductivity begins to rise and diverges as ${T}^{ensuremath{-}1}$. This behavior is shown to be a consequence of both the electron-phonon coupling and the strong electron-electron interaction. The thermoelectric power is formulated for the strongly interacting model system and it is found that it vanishes---a result that appears to be a consequence of the particle-hole symmetry of the half-filled band." @default.
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- W2089588393 date "1974-05-15" @default.
- W2089588393 modified "2023-09-27" @default.
- W2089588393 title "Small-polaron effects on the dc conductivity and thermoelectric power of the one-dimensional Mott semiconductor" @default.
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- W2089588393 doi "https://doi.org/10.1103/physrevb.9.4329" @default.
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