In-plane penetration-depth anisotropy in a {ital d}-wave model

Journal Article · Tue Aug 01 04:00:00 EDT 1995 · Physical Review, B: Condensed Matter

DOI:https://doi.org/10.1103/PhysRevB.52.4568· OSTI ID:90514

O`Donovan, C; Carbotte, J P ^[1]

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1. Physics and Astronomy Department, McMaster University, Hamilton, Ontario, L8S 4M1 (Canada)

The zero-temperature penetration depth in the CuO{sub 2} plane of YBa{sub 2}Cu{sub 3}O{sub 7} has been found to be very anisotropic. The large measured difference between the {ital a} and {ital b} directions is taken as evidence that a significant part of the condensate resides in the chains. We present a simplified model for this anisotropy in which planes (CuO{sub 2}) and chains (CuO) are described within a single tight-binding band but with different hopping parameters in the {ital a} and {ital b} directions. The pairing is assumed to be due to spin fluctuations in the nearly antiferromagnetic Fermi liquid, but a different mechanism that leads to {ital d}-wave-type pairing would have similar results.

• OSTI ID: 90514
• Journal Information: Physical Review, B: Condensed Matter, Journal Name: Physical Review, B: Condensed Matter Journal Issue: 6 Vol. 52; ISSN PRBMDO; ISSN 0163-1829
• Country of Publication: United States
• Language: English

Related Subjects

66 PHYSICS
ANISOTROPY
D WAVES
HIGH-TC SUPERCONDUCTORS
PAIRING INTERACTIONS
PENETRATION DEPTH