Coherent vs incoherent interlayer transport in layered metals
Abstract
The magnetic-field, temperature, and angular dependence of the interlayer magnetoresistance of two different quasi-two-dimensional (2D) organic superconductors is reported. For -(BEDT-TTF)2I3 we find a well-resolved peak in the angle-dependent magnetoresistance at = 90 (field parallel to the layers). This clear-cut proof for the coherent nature of the interlayer transport is absent for β''-(BEDT-TTF)2SF5CH2CF2SO3. This and the non-metallic behavior of the magnetoresistance suggest an incoherent quasiparticle motion for the latter 2D metal.
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