Magnetic penetration depth in the organic superconductor. kappa. -(BEDT-TTF) sub 2 Cu(NCS) sub 2

Journal Article · Mon Mar 12 00:00:00 EST 1990 · Physical Review Letters; (USA)

DOI:https://doi.org/10.1103/PhysRevLett.64.1293· OSTI ID:6904081

Harshman, D R; Kleiman, R N; Haddon, R C; Chichester-Hicks, S V; Kaplan, M L; Rupp, Jr, L W ^[1]; Pfiz, T; Williams, D L ^[2]; Mitzi, D B ^[3]

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1. AT T Bell Laboratories, Murray Hill, New Jersey 07974 (USA)
2. University of British Columbia, Vancouver, British Columbia, Canada V6T2A6 (CA)
3. Department of Applied Physics, Stanford University, Stanford, California 94305 (USA)

We report the first direct measurement of the effective magnetic penetration depth in oriented single crystals of {kappa}-(BEDT-TTF){sub 2}Cu(NCS){sub 2}, with {ital T}{sub {ital c}}(5 G){approx}9 K. Results yield an effective in-plane value of {lambda}{sub {ital e}{ital f}{ital f}}{sup {ital b}{ital c}}(0){approx}9800 A (for {ital H}{sub ext}{approx}3 kG), and a temperature dependence consistent with conventional {ital s}-wave pairing. Comparison with the London penetration depth, {lambda}{sub {ital L}}(0) (estimated to be {approx}5100 A), indicates a tendency toward dirty-limit superconductivity, with the ratio of coherence length over mean free path of {xi}{sub 0}{sup {ital b}{ital c}}/{ital l}{sub {ital b}{ital c}}{approx}2.7. From our results, it appears unnecessary to invoke any unconventional pairing schemes to explain the superconductivity in this material.

• OSTI ID: 6904081
• Journal Information: Physical Review Letters; (USA), Vol. 64:11; ISSN 0031-9007
• Country of Publication: United States
• Language: English

Related Subjects

36 MATERIALS SCIENCE
BEDT-TTF
PENETRATION DEPTH
CARBON NITRIDES
CARBON SULFIDES
COPPER COMPLEXES
SUPERCONDUCTORS
COHERENCE LENGTH
CORRELATIONS
ELECTRON PAIRS
EXPERIMENTAL DATA
GAUSS FUNCTION
LONDON EQUATION
MAGNETIZATION
RELAXATION
S WAVES
TEMPERATURE DEPENDENCE
TRANSITION TEMPERATURE
ULTRALOW TEMPERATURE
CARBON COMPOUNDS
CHALCOGENIDES
COMPLEXES
DATA
DIMENSIONS
EQUATIONS
FUNCTIONS
HETEROCYCLIC COMPOUNDS
INFORMATION
LENGTH
NITRIDES
NITROGEN COMPOUNDS
NUMERICAL DATA
ORGANIC COMPOUNDS
ORGANIC SULFUR COMPOUNDS
ORGANIC SUPERCONDUCTORS
PARTIAL WAVES
PHYSICAL PROPERTIES
PNICTIDES
SULFIDES
SULFUR COMPOUNDS
THERMODYNAMIC PROPERTIES
TRANSITION ELEMENT COMPLEXES
360603* - Materials- Properties