Coherent vs incoherent interlayer transport in layered metals

Details Coherent vs incoherent interlayer transport in layered metals Coherent vs incoherent interlayer transport in layered metals

2002-03-27

arxiv.org/abs/cond-mat/0203567v1

Physics

Condensed Matter

Strongly Correlated Electrons

4 pages, 4 figures. Phys. Rev. B, in press

Scientific paper

10.1103/PhysRevB.65.180506

The magnetic-field, temperature, and angular dependence of the interlayer magnetoresistance of two different quasi-two-dimensional (2D) organic superconductors is reported. For $\kappa$-(BEDT-TTF)$_2$I$_3$ we find a well-resolved peak in the angle-dependent magnetoresistance at $\Theta = 90^\circ$ (field parallel to the layers). This clear-cut proof for the coherent nature of the interlayer transport is absent for $\beta$''-(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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