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Title: Muon-spin-relaxation measurements of magnetic penetration depth in organic superconductors (BEDT-TTF) sub 2 - X : X =Cu(NCS) sub 2 and Cu(N(CN) sub 2 )Br

Abstract

The magnetic-field penetration depth {lambda} in the organic superconductors {kappa}-(BEDT-TTF){sub 2} Cu(NCS){sub 2} and {kappa}-(BEDT-TTF){sub 2} Cu(N(CN){sub 2})Br has been measured over a wide temperature region 20 mK{le}{ital T}{le}15 K via the muon-spin-relaxation technique. Linear variation of {lambda} with {ital T} at low temperatures, found in both systems, is consistent with anisotropic superconducting pairings with line nodes in the energy gap. In the latter compound, we observe flux depinning at {ital T}{similar to}5 K, well below {ital T}{sub {ital c}}=12 K.

Authors:
; ; ; ;  [1]; ;  [2];  [3]; ;  [4]; ; ; ;  [5]
  1. (Department of Physics, Columbia University, New York, New York 10027 (United States))
  2. (Department of Physics, University of British Columbia, Vancouver, British Columbia, V6T 2A3 (Canada))
  3. (Department of Physics, Virginia State University, Petersburg, Virginia 23803 (United States))
  4. (Department of Chemistry, Kyoto University, Kyoto 606 (Japan))
  5. (Chemistry and Materials Science Division, Argonne National Laboratory, Argonne, Illinois 60439 (United States))
Publication Date:
OSTI Identifier:
7305743
DOE Contract Number:  
W-31-109-ENG-38
Resource Type:
Journal Article
Journal Name:
Physical Review Letters; (United States)
Additional Journal Information:
Journal Volume: 68:12; Journal ID: ISSN 0031-9007
Country of Publication:
United States
Language:
English
Subject:
36 MATERIALS SCIENCE; ORGANIC SUPERCONDUCTORS; PENETRATION DEPTH; ENERGY GAP; MAGNETIC FLUX; MUON SPIN RELAXATION; PAIRING ENERGY; TEMPERATURE DEPENDENCE; TEMPERATURE RANGE 0000-0013 K; BINDING ENERGY; ENERGY; RELAXATION; SUPERCONDUCTORS; TEMPERATURE RANGE; 360607* - Other Materials- Superconducting Properties- (1992-)

Citation Formats

Le, L.P., Luke, G.M., Sternlieb, B.J., Wu, W.D., Uemura, Y.J., Brewer, J.H., Riseman, T.M., Stronach, C.E., Saito, G., Yamochi, H., Wang, H.H., Kini, A.M., Carlson, K.D., and Williams, J.M. Muon-spin-relaxation measurements of magnetic penetration depth in organic superconductors (BEDT-TTF) sub 2 - X : X =Cu(NCS) sub 2 and Cu(N(CN) sub 2 )Br. United States: N. p., 1992. Web. doi:10.1103/PhysRevLett.68.1923.
Le, L.P., Luke, G.M., Sternlieb, B.J., Wu, W.D., Uemura, Y.J., Brewer, J.H., Riseman, T.M., Stronach, C.E., Saito, G., Yamochi, H., Wang, H.H., Kini, A.M., Carlson, K.D., & Williams, J.M. Muon-spin-relaxation measurements of magnetic penetration depth in organic superconductors (BEDT-TTF) sub 2 - X : X =Cu(NCS) sub 2 and Cu(N(CN) sub 2 )Br. United States. doi:10.1103/PhysRevLett.68.1923.
Le, L.P., Luke, G.M., Sternlieb, B.J., Wu, W.D., Uemura, Y.J., Brewer, J.H., Riseman, T.M., Stronach, C.E., Saito, G., Yamochi, H., Wang, H.H., Kini, A.M., Carlson, K.D., and Williams, J.M. Mon . "Muon-spin-relaxation measurements of magnetic penetration depth in organic superconductors (BEDT-TTF) sub 2 - X : X =Cu(NCS) sub 2 and Cu(N(CN) sub 2 )Br". United States. doi:10.1103/PhysRevLett.68.1923.
@article{osti_7305743,
title = {Muon-spin-relaxation measurements of magnetic penetration depth in organic superconductors (BEDT-TTF) sub 2 - X : X =Cu(NCS) sub 2 and Cu(N(CN) sub 2 )Br},
author = {Le, L.P. and Luke, G.M. and Sternlieb, B.J. and Wu, W.D. and Uemura, Y.J. and Brewer, J.H. and Riseman, T.M. and Stronach, C.E. and Saito, G. and Yamochi, H. and Wang, H.H. and Kini, A.M. and Carlson, K.D. and Williams, J.M.},
abstractNote = {The magnetic-field penetration depth {lambda} in the organic superconductors {kappa}-(BEDT-TTF){sub 2} Cu(NCS){sub 2} and {kappa}-(BEDT-TTF){sub 2} Cu(N(CN){sub 2})Br has been measured over a wide temperature region 20 mK{le}{ital T}{le}15 K via the muon-spin-relaxation technique. Linear variation of {lambda} with {ital T} at low temperatures, found in both systems, is consistent with anisotropic superconducting pairings with line nodes in the energy gap. In the latter compound, we observe flux depinning at {ital T}{similar to}5 K, well below {ital T}{sub {ital c}}=12 K.},
doi = {10.1103/PhysRevLett.68.1923},
journal = {Physical Review Letters; (United States)},
issn = {0031-9007},
number = ,
volume = 68:12,
place = {United States},
year = {1992},
month = {3}
}