Enhancement of susceptibility and the electrical resistivity of organic metals with a small mean free path

O. Entin-Wohlman, M. Kaveh, H. Gutfreund, M. Weger, N. F. Mott

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Abstract

The spin susceptibility of organic metals is enhanced over the Pauli value at ambient temperature, where the mean free path is close to one lattice constant. The resistivity continues to follow the T2 law in this regime. A theory is described which accounts for these unusual effects. The theory is somewhat analogous to polaron theory and makes use of the quadratic nature of the electron-phonon coupling. The electrons are localized by short-lived 1 phonon traps accounting for the transition to a Curie-like behaviour. Tunnelling between these nondegenerate molecular sites gives rise to a T2 law with a coefficient close to that of the low-temperature state, where the conductivity is metallic.

Original languageEnglish
Pages (from-to)251-263
Number of pages13
JournalPhilosophical Magazine B: Physics of Condensed Matter; Statistical Mechanics, Electronic, Optical and Magnetic Properties
Volume50
Issue number2
DOIs
StatePublished - 1 Jan 1984
Externally publishedYes

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