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- W2002656293 abstract "A theory of correlated hopping diffusion on lattices with site-exclusion interaction is presented. We develop a variational procedure to estimate the diffusion constant D. We derive a method of obtaining several sequences of decreasing upper bounds for D. The method is extensively discussed for the particular sequence that starts with the mean-field approximant ${mathit{D}}^{mathrm{MF}}$. The first term of a second sequence Difmmode tilde{}else ~{}fi{} $^{mathrm{MF}}$ is obtained by a suitable renormalization of the jump rates and is closer to D than ${mathit{D}}^{mathrm{MF}}$. This modified mean-field approximation enables us to formulate an improved version of the Miller-Abrahams equivalence to a resistor network that includes correlation effects." @default.
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- W2002656293 date "1992-04-01" @default.
- W2002656293 modified "2023-09-25" @default.
- W2002656293 title "Occupancy-correlation corrections in hopping" @default.
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- W2002656293 doi "https://doi.org/10.1103/physrevb.45.7739" @default.
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