Energy gap structure of layered superconductors

Conference · Mon Nov 01 00:00:00 EST 1993

OSTI ID:10114041

Liu, S H ^[1]; Klemm, R A ^[2]

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1. Oak Ridge National Lab., TN (United States)
2. Argonne National Lab., IL (United States)

We report the energy gap structure and density-of-states (DOS) of a model layered superconductor with one superconducting layer and one normal layer in a unit cell along the c-axis. In the physically interesting parameter range where the interlayer hopping strengths of the quasiparticles are comparable to the critical temperature, the peaks in the DOS curve do not correspond to the order parameter (OP) of the superconducting layer, but depend on the OP and the band dispersion in the c-direction in a complex manner. In contrast to a BCS superconductor, the DOS of layered systems have logarithmic singularities. Our simulated tunneling characteristics bear close resemblance to experimental results.

• Research Organization: Argonne National Lab., IL (United States); Oak Ridge National Lab., TN (United States)
• Sponsoring Organization: USDOE, Washington, DC (United States)
• DOE Contract Number: W-31109-ENG-38; AC05-84OR21400
• OSTI ID: 10114041
• Report Number(s): ANL/MSD/CP-80230; CONF-940121-1; ON: DE94005132
• Resource Relation: Conference: Superconducting superlattices and multilayers and oxide superconductory physics and nanoengineering,Los Angeles, CA (United States),23-28 Jan 1994; Other Information: PBD: Nov 1993
• Country of Publication: United States
• Language: English

Related Subjects

75 CONDENSED MATTER PHYSICS
SUPERCONDUCTIVITY AND SUPERFLUIDITY
SUPERCONDUCTORS
ENERGY GAP
LAYERS
COPPER OXIDES
HIGH-TC SUPERCONDUCTORS
GREEN FUNCTION
ELECTRONIC STRUCTURE
TRANSITION TEMPERATURE
ORDER PARAMETERS
TUNNEL EFFECT
665411
BASIC SUPERCONDUCTIVITY STUDIES