Temperature dependence of Cu nuclear relaxation rates and the anisotropy in Y sub 1 Ba sub 2 Cu sub 3 O sub 7 below T sub c; Evidence for an unconventional pairing state

Journal Article · Mon Apr 20 00:00:00 EDT 1992 · Modern Physics Letters B; (Singapore)

DOI:https://doi.org/10.1142/S0217984992000636· OSTI ID:7071083

Lu, J P ^[1]

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1. Illinois Univ., Urbana, IL (United States). Loomis Lab. of Physics

In this paper the Cu nuclear relaxation rate W{sub 1} and their anisotropy ratio in the superconducting state are studied within a BCS pairing framework. Assuming that the strong scattering found in the normal state persists below T{sub c}, the temperature dependence of W{sub 1} for both s-wave and d-wave pairing are shown to agree with experiments. However only in the d-wave case is the anisotropy ratio W{sub 1a}/W{sub 1c} found to drop near T{sub c} and to increase at lower T, as observed in recent experiments. This provides strong evidence for the existence of the BCS coherence factors and an unconventional pairing state.

• OSTI ID: 7071083
• Journal Information: Modern Physics Letters B; (Singapore), Vol. 6:9; ISSN 0217-9849
• Country of Publication: United States
• Language: English

Related Subjects

36 MATERIALS SCIENCE
75 CONDENSED MATTER PHYSICS
SUPERCONDUCTIVITY AND SUPERFLUIDITY
BARIUM COMPOUNDS
BCS THEORY
SUPERCONDUCTIVITY
COPPER
SPIN-LATTICE RELAXATION
YTTRIUM COMPOUNDS
ANISOTROPY
COOPER PAIRS
CUPRATES
HIGH-TC SUPERCONDUCTORS
TEMPERATURE DEPENDENCE
TRANSITION TEMPERATURE
ALKALINE EARTH METAL COMPOUNDS
COPPER COMPOUNDS
ELECTRIC CONDUCTIVITY
ELECTRICAL PROPERTIES
ELEMENTS
METALS
OXYGEN COMPOUNDS
PHYSICAL PROPERTIES
RELAXATION
SUPERCONDUCTORS
THERMODYNAMIC PROPERTIES
TRANSITION ELEMENT COMPOUNDS
TRANSITION ELEMENTS
360207* - Ceramics
Cermets
& Refractories- Superconducting Properties- (1992-)
665411 - Basic Superconductivity Studies- (1992-)