Measurement of interlayer spin diffusion in the organic conductor kappa-(BEDT-TTF)(2)Cu[N(CN)(2)]X, X = Cl, Br

In organic conductors the overlap integral between layers is small In-plane momentum scattering is rapid and transport perpendicular to the layers is expected to be blocked We present a high frequency conduction electron spin resonance (CESR) study in the layered organic metals kappa-(BEDT-TTF)(2)Cu[N(CN)(2)]X, X = Cl Br which verifies that the inter-layer spin hopping is effectively blocked The method relies on resolving the CESR lines of adjacent layers in which the orientation of the g-factor tensors differs We find that at ambient pressure and in the metallic phase the electron spin diffusion is two dimensional in both the X = Cl and Br compounds i e electrons diffuse longer than the spin lifetime within a single molecular layer without inter-layer hopping Application of pressure at 250 K Increases rapidly the inter-layer hopping rate of spins (C) 2009 Elsevier B V All rights reserved

Published in:
Physica B-Condensed Matter, 405, S168-S171
Presented at:
8th International Symposium on Crystalline Organic Metals Superconductors and Ferromagnets (ISCOM 2009)/64th Yamada Conference, Niseko, JAPAN, Sep 12-17, 2009

 Record created 2011-12-16, last modified 2018-01-28

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