{sup 13}C NMR studies of the normal and superconducting states of the organic superconductor {kappa}-(ET){sub 2}Cu[N(CN){sub 2}]Br
Journal Article
·
· Physical Review, B: Condensed Matter
- Department of Physics and Materials Research Laboratory, University of Illinois at Urbana-Champaign, 1110 West Green Street, Urbana, Illinois 61801-3080 (United States)
- Chemistry and Materials Science Division, Argonne National Laboratory, Argonne, Illinois 60439 (United States)
The authors report {sup 13}C NMR spin-lattice relaxation rates 1/{ital T}{sub 1} and Knight shifts {ital K}{sub {ital S}} in the quasi-two-dimensional organic superconductor {kappa}-(ET){sub 2}Cu[N(CN){sub 2}]Br ({ital T}{sub {ital c}}=11.6 K), for an aligned single crystal. The normal-state behavior is reminiscent of the high-{ital T}{sub {ital c}} cuprates, in which antiferromagnetic fluctuations and spin-gap behavior dominate. In the superconducting state, the data rule out the BCS electron-phonon mechanism as the source of the superconductivity, but support an unconventional pairing state with possible nodes in the gap function.
- Research Organization:
- University of Illinois
- DOE Contract Number:
- FG02-91ER45439; W-31109-ENG-38
- OSTI ID:
- 239370
- Journal Information:
- Physical Review, B: Condensed Matter, Journal Name: Physical Review, B: Condensed Matter Journal Issue: 14 Vol. 52; ISSN 0163-1829; ISSN PRBMDO
- Country of Publication:
- United States
- Language:
- English
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