Persistence to High Temperatures of Interlayer Coherence in an Organic Superconductor
John Singleton, P. A. Goddard, A. Ardavan, A. I. Coldea, S. J. Blundell, R. D. McDonald, S. Tozer, J. A. Schlueter
DOI 10.1103/PhysRevLett.99.027004 · Physical Review Letters
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Abstract
The interlayer magnetoresistance ρzz of the organic metal κ−(BEDT−TTF)2Cu(NCS)2 is studied in fields of up to 45 T and at temperatures T from 0.5 to 30 K. The peak in ρzz seen in in-plane fields, a definitive signature of interlayer coherence, remains to Ts exceeding the Anderson criterion for incoherent transport by a factor ∼30. Angle-dependent magnetoresistance oscillations are modeled using an approach based on field-induced quasiparticle paths on a 3D Fermi surface, to yield the T dependence of the scattering rate τ−1. The results suggest that τ−1 does not vary strongly over the Fermi surface, and that it has a T2 dependence due to electron-electron scattering.
Source-reported materials — not catalogue approval
| Formula | Reported Tc (K) | Pressure (GPa) | Type |
|---|---|---|---|
| κ-(BEDT-TTF)2Cu(NCS)2 Archive — visibility unverified Source-occurrence policy only; no material identity or catalogue acceptance is inferred from the formula. | — | Pressure not reported | unknown |
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