Test for interlayer coherence in a quasi-two-dimensional superconductor.

Journal Article · Sun Jan 20 23:00:00 EST 2002 · Phys. Rev. Lett.

DOI:https://doi.org/10.1103/PhysRevLett.88.037001· OSTI ID:949280

Singleton, J; Goddard, P A; Ardavan, A; Harrison, N; Blundell, S J; Schlueter, J A; Kini, A M; LANL,

Peaks in the magnetoresistivity of the layered superconductor {kappa}-(BEDT-TTF){sub 2}Cu(NCS){sub 2} , measured in fields {<=}45 T applied within the layers, show that the Fermi surface is extended in the interlayer direction and enable the interlayer transfer integral (t{sub {perpendicular}}{approx}0.04 meV) to be deduced. However, the quasiparticle scattering rate {tau}{sup -1} is such that {Dirac_h}/{tau}{approx}6t{sub {perpendicular}}, implying that {kappa}-(BEDT-TTF){sub 2}Cu(NCS){sub 2} meets the criterion used to identify interlayer incoherence. The applicability of this criterion to anisotropic materials is thus shown to be questionable.

• Research Organization: Argonne National Laboratory (ANL)
• Sponsoring Organization: SC
• DOE Contract Number: AC02-06CH11357
• OSTI ID: 949280
• Report Number(s): ANL/MSD/JA-39504
• Journal Information: Phys. Rev. Lett., Journal Name: Phys. Rev. Lett. Journal Issue: 3 ; Jan. 21, 2002 Vol. 88; ISSN 0031-9007; ISSN PRLTAO
• Country of Publication: United States
• Language: ENGLISH

Related Subjects

36 MATERIALS SCIENCE
BEDT-TTF
FERMI LEVEL
LAYERS
SCATTERING
SUPERCONDUCTORS