Interlayer pairing and c-axis versus ab-plane gap anisotropy in high Tc superconductors
- (Argonne National Lab., IL (USA)) Liu, S.H. (Oak Ridge National Lab., TN (USA))
Interlayer BCS-like (Bardeen-Cooper-Schrieffer theory) pairing in nearly two-dimensional superconductors with N = 1,2,3 conducting layers per unit cell is investigated. For N = 1, the singlet {delta}{sub s} and triplet {Delta}{sub t}, order parameters have identical {Tc}'s (T{sub cs} = T{sub ct}) and magnitudes, and the gap isotropic. For N = 2, T{sub cs} {ge} T{sub ct} and {vert bar}{Delta}{sub s}{vert bar} {ge} {vert bar}{Delta}{sub t}{vert bar}. In region 1 of the parameters, the gap is anisotropic and nodeless for T < T{sub cs}. In region 2, the gap has nodes near to T{sub cs}, but is nodeless at low T. For N = 3, T{sub cs} {much gt} T{sub ct}, and the gap is anisotropic but nodeless on two bands, but has a node on the third band. For N = 2,3, the k{sub z}-dependence of the gap and the quasiparticle density of states are found. For N = 1(2,3) intra- and interlayer pairing are completely (essentially) incompatible. 15 refs., 8 figs.
- Research Organization:
- Oak Ridge National Lab., TN (USA); Argonne National Lab., IL (USA)
- Sponsoring Organization:
- USDOE; USDOE, Washington, DC (USA)
- DOE Contract Number:
- AC05-84OR21400; W-31109-ENG-38
- OSTI ID:
- 5711226
- Report Number(s):
- ANL/CP-73103; CONF-910190-4; ON: DE91012218
- Resource Relation:
- Conference: Workshop on electronic structures and mechanisms for high temperature superconductivity, Miami, FL (USA), 3-9 Jan 1991
- Country of Publication:
- United States
- Language:
- English
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