Density-of-states-driven anisotropies induced by momentum decoupling in Bi{sub 2}Sr{sub 2}CaCu{sub 2}O{sub 8}
- Institute of Electronic Structure and Laser, Foundation for Research and Technology-Hellas, P.O. Box 1527, Heraklion Crete 71110 (Greece)
- Dipartimento di Fisica, Universita di Roma ``La Sapienza,`` Piazzale A. Moro 2, I-00185 Roma (Italy)
Momentum decoupling arises when small-{ital q} scattering dominates the pairing interaction and implies density-of-states-driven anisotropies in superconductivity. In this scheme we explain puzzling aspects of the anisotropy in Bi{sub 2}Sr{sub 2}CaCu{sub 2}O{sub 8}, such as the correlation of gap magnitude and visibility of the dip above the gap, the enhancement of anisotropy with temperature, the presence of gap minima away from the {Gamma}-{ital X} direction and a gap maximum in the {Gamma}-{ital X} direction, the similarity of tunnel and angle-resolved photoemission spectra in the {Gamma}-{ital {bar M}} direction, and the asymmetry in vacuum tunnel spectra where the dip structure is present only at negative sample bias. {copyright} {ital 1996 The American Physical Society.}
- OSTI ID:
- 383203
- Journal Information:
- Physical Review, B: Condensed Matter, Journal Name: Physical Review, B: Condensed Matter Journal Issue: 10 Vol. 54; ISSN 0163-1829; ISSN PRBMDO
- Country of Publication:
- United States
- Language:
- English
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