Test for Interlayer Coherence in a Quasi-Two-Dimensional Superconductor
John Singleton, P. A. Goddard, A. Ardavan, N. Harrison, S. J. Blundell, J. A. Schlueter, A. M. Kini
DOI 10.1103/PhysRevLett.88.037001 · Physical Review Letters
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Abstract
Peaks in the magnetoresistivity of the layered superconductor κ−(BEDT−TTF)2Cu(NCS)2, measured in fields ≤45T applied within the layers, show that the Fermi surface is extended in the interlayer direction and enable the interlayer transfer integral (t⊥≈0.04meV) to be deduced. However, the quasiparticle scattering rate τ−1 is such that ħ/τ∼6t⊥, implying that κ−(BEDT−TTF)2Cu(NCS)2 meets the criterion used to identify interlayer incoherence. The applicability of this criterion to anisotropic materials is thus shown to be questionable.
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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