Effect of impurity scattering on a ({ital d}+{ital s})-wave superconductor

Journal Article · Wed Nov 01 04:00:00 EST 1995 · Physical Review, B: Condensed Matter

DOI:https://doi.org/10.1103/PhysRevB.52.13576· OSTI ID:122339

Kim, H; Nicol, E J ^[1]

---

1. Department of Physics, University of Guelph, Guelph, Ontario, N1G 2W1 (Canada)

Recent measurements of the surface impedance in YBa{sub 2}Cu{sub 3}O{sub 7{minus}{delta}} single crystals show large in-plane anisotropy which implies that orthorhombicity due to the Cu-O chains is not small. In addition, the controversy between the {ital d}-wave and the {ital s}-wave order parameter persists. In the framework of the orthorhombic symmetry, an order parameter with ({ital d}+{ital s})-wave symmetry is considered in an attempt to understand current experimental results. We provide a detailed study of the characteristics of such an order parameter in the low-temperature behavior of the penetration depth, the density of states, and the {ital T}{sub {ital c}} suppression in the presence of nonmagnetic impurity scattering. The results are discussed in comparison with the {ital d}-wave and the anisotropic {ital s}-wave cases.

• OSTI ID: 122339
• Journal Information: Physical Review, B: Condensed Matter, Journal Name: Physical Review, B: Condensed Matter Journal Issue: 18 Vol. 52; ISSN PRBMDO; ISSN 0163-1829
• Country of Publication: United States
• Language: English

Related Subjects

66 PHYSICS
ANISOTROPY
BAND THEORY
BARIUM OXIDES
BCS THEORY
CRYSTAL DEFECTS
CRYSTAL STRUCTURE
CUPRATES
D STATES
ELECTRIC CONDUCTIVITY
ENERGY-LEVEL DENSITY
FERMI LEVEL
HIGH-TC SUPERCONDUCTORS
IMPURITIES
ORDER PARAMETERS
ORTHORHOMBIC LATTICES
PENETRATION DEPTH
S STATES
SCATTERING
SPIN WAVES
SURFACE PROPERTIES
TRANSITION TEMPERATURE
YTTRIUM OXIDES