We study a molecular lattice Hamiltonian in which polaronic charge carriers interact with nonlinear potentials provided by local atomic fluctuations between two equilibrium sites. The path integral formalism is applied to select the class of atomic oscillations which mainly contributes to the partition function and the electrical resistivity is computed in a number of representative cases. Nonmetallic resistivity behaviors are found at temperatures above ≃100 K.
Resistivity Peculiarities in Systems with Lattice Distortions
ZOLI, Marco
2001-01-01
Abstract
We study a molecular lattice Hamiltonian in which polaronic charge carriers interact with nonlinear potentials provided by local atomic fluctuations between two equilibrium sites. The path integral formalism is applied to select the class of atomic oscillations which mainly contributes to the partition function and the electrical resistivity is computed in a number of representative cases. Nonmetallic resistivity behaviors are found at temperatures above ≃100 K.File in questo prodotto:
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