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arXiv · 0811.4323

Magnetic Field Induced Coherence-Incoherence Crossover in the Interlayer Conductivity of a Layered Organic Metal

M. V. Kartsovnik·P. D. Grigoriev·W. Biberacher·N. D. Kushch
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Abstract

The angle-dependent interlayer magnetoresistance of the layered organic metal $α$-(BEDT-TTF)$_2$KHg(SCN)$_4$ is found to undergo a dramatic change from the classical conventional behavior at low magnetic fields to an anomalous one at high fields. This field-induced crossover and its dependence on the sample purity and temperature imply the existence of two parallel channels in the interlayer transport: a classical Boltzmann conductivity $σ_{c}$ and an incoherent channel $σ_{i}$. We propose a simple model for $σ_{i}$ explaining its metallic temperature dependence and low sensitivity to the inplane field component.

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M. V. Kartsovnik, P. D. Grigoriev, W. Biberacher, N. D. Kushch. 2008-11-26. Magnetic Field Induced Coherence-Incoherence Crossover in the Interlayer Conductivity of a Layered Organic Metal. https://doi.org/10.1103/physrevb.79.165120

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