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Coherent vs incoherent interlayer transport in layered metals

J. Wosnitza·J. Hagel·J. S. Qualls·J. S. Brooks·E. Balthes·D. Schweitzer·J. A. Schlueter·U. Geiser·J. Mohtasham·R. W. Winter·G. L. Gard
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Abstract

The magnetic-field, temperature, and angular dependence of the interlayer magnetoresistance of two different quasi-two-dimensional (2D) organic superconductors is reported. For $κ$-(BEDT-TTF)$_2$I$_3$ we find a well-resolved peak in the angle-dependent magnetoresistance at $Θ= 90^\circ$ (field parallel to the layers). This clear-cut proof for the coherent nature of the interlayer transport is absent for $β$''-(BEDT-TTF)$_2$SF$_5$CH$_2$CF$_2$SO$_3$. This and the non-metallic behavior of the magnetoresistance suggest an incoherent quasiparticle motion for the latter 2D metal.

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J. Wosnitza, J. Hagel, J. S. Qualls, J. S. Brooks, E. Balthes, D. Schweitzer, J. A. Schlueter, U. Geiser, J. Mohtasham, R. W. Winter, G. L. Gard. 2002-03-27. Coherent vs incoherent interlayer transport in layered metals. https://doi.org/10.1103/physrevb.65.180506

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