{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
{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
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有机超导体{kappa}-(ET){sub 2}Cu[N(CN){sub 2}]Br的正常态和超导态的{sup 13}C NMR研究
DOI：
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发表时间：
1995
期刊：
影响因子：
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通讯作者：
J. Williams
中科院分区：
文献类型：
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作者：
S. M. D. Soto;C. Slichter;A. Kini;H. H. Wang;U. Geiser;J. Williams
报道了准二维有机超导体{kappa}-(Et){sub2}Cu[N(CN){sub2}]Brr({italT}{subitalc}}=11.6K)中的{sup 13}c核磁共振自旋晶格驰豫速率1/{italT}{sub1}和奈特位移{italK}{subital2}}。正常态行为让人想起高T}{subc}铜酸盐，其中反铁磁涨落和自旋能隙行为占主导地位。在超导态，数据排除了BCS电子-声子机制作为超导电性的来源，但支持在带隙函数中有可能的节点的非传统配对态。
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.