Energy-gap structure of layered superconductors
Journal Article
·
· Physical Review, B: Condensed Matter; (United States)
- Solid State Division, Oak Ridge National Laboratory, Oak Ridge, Tennessee 37831-6032 (United States)
- Materials Science Division, Argonne National Laboratory, Argonne, Illinois 60439 (United States)
We have analyzed the energy gaps and density of states (DOS) of layered superconductors with two inequivalent layers in a unit cell in the [ital c]-axis direction. In the physically interesting parameter range where the interlayer hopping strengths of the quasiparticles are comparable to the critical temperature, the DOS curves have a double-peak structure, where the extra peaks are manifestations of interband pairing. Unlike BCS superconductors, the peaks are logarithmic singularities. Our simulated tunneling characteristics bear close resemblance to experimental results.
- DOE Contract Number:
- AC05-84OR21400; W-31109-ENG-38
- OSTI ID:
- 6129362
- Journal Information:
- Physical Review, B: Condensed Matter; (United States), Journal Name: Physical Review, B: Condensed Matter; (United States) Vol. 48:14; ISSN PRBMDO; ISSN 0163-1829
- Country of Publication:
- United States
- Language:
- English
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