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Dissipation in the superconducting state of kappa-(BEDT-TTF)2Cu(NCS)2

Liang Yin·Moon-Sun Nam·James G. Analytis·Stephen J. Blundell·Arzhang Ardavan·John A. Schlueter·Takahiko Sasaki
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Abstract

We have studied the interlayer resistivity of the prototypical quasi-two-dimensional organic superconductor $κ$-(BEDT-TTF)$_2$Cu(NCS)$_2$ as a function of temperature, current and magnetic field, within the superconducting state. We find a region of non-zero resistivity whose properties are strongly dependent on magnetic field and current density. There is a crossover to non-Ohmic conduction below a temperature that coincides with the 2D vortex solid -- vortex liquid transition. We interpret the behaviour in terms of a model of current- and thermally-driven phase slips caused by the diffusive motion of the pancake vortices which are weakly-coupled in adjacent layers, giving rise to a finite interlayer resistance.

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Liang Yin, Moon-Sun Nam, James G. Analytis, Stephen J. Blundell, Arzhang Ardavan, John A. Schlueter, Takahiko Sasaki. 2007-04-24. Dissipation in the superconducting state of kappa-(BEDT-TTF)2Cu(NCS)2. https://doi.org/10.1103/physrevb.76.014506

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