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Non-Fermi liquid behavior in nearly charge ordered layered metals

J. Merino·A. Greco·N. Drichko·M. Dressel
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Abstract

Non-Fermi liquid behavior is shown to occur in two-dimensional metals which are close to a charge ordering transition driven by the Coulomb repulsion. A linear temperature dependence of the scattering rate together with an increase of the electron effective mass occur above T*, a temperature scale much smaller than the Fermi temperature. It is shown that the anomalous temperature dependence of the optical conductivity of the quasi-two-dimensional organic metal alpha-(BEDT-TTF)2MHg(SCN)4, with M=NH4 and Rb, above T*=50-100 K, agrees qualitatively with our predictions for the electronic properties of nearly charge ordered two-dimensional metals.

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J. Merino, A. Greco, N. Drichko, M. Dressel. 2006-05-16. Non-Fermi liquid behavior in nearly charge ordered layered metals. https://doi.org/10.1103/physrevlett.96.216402

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