CONDENSED MATTER SECTION-INFORMAL SEMINAR:"Anomalous c-axis transport in layered metals"
ICTP-Main Building-Seminar Room
(University of Florida)
Transport in many layered materials (cuprates, perovskites,graphite, etc.) shows an interesting anomaly: whereas the temperature dependence of the in-plane resistivity is metallic, that of the out-of-plane (c-axis) resistivity is insulating or even non-monotonic. We show that the band transport in all directions, described by the standard Boltzmann equation, is robust with respect to both elastic and inelastic scattering as long as E_F\tau>>1. A model of phonon-assisted tunneling via resonant states located in between the layers is suggested to explain a non-monotonic temperature dependence of the c-axis resistivity observed in experiments.
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