Modification of local electronic state by BEDT-STF doping to k-(BEDT-TTF)2Cu[N(CN)2]Br salt studied by 13C NMR spectroscopy
Modification of local electronic state by BEDT-STF doping to k-(BEDT-TTF)2Cu[N(CN)2]Br salt studied by 13C NMR spectroscopy
复制标题
通过 13C NMR 光谱研究 BEDT-STF 掺杂 k-(BEDT-TTF)2Cu[N(CN)2]Br 盐对局域电子态的修饰
DOI：
10.1103/physrevb.93.094515
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发表时间：
2016
影响因子：
3.7
通讯作者：
Atsushi Kawamoto
中科院分区：
文献类型：
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作者：
Takuya Kobayashi;Yoshihiko Ihara;Atsushi Kawamoto
我们展示了掺杂 BEDT-STF 分子的有机超导体 -(BEDT-TTF)(-Br) 的位点选择性核磁共振波谱结果。我们通过对两种类型样品的NMR测量，从微观上揭示了由BEDT-STF掺杂引起的局域电子态的调制，这两种样品是掺杂有天然丰富的BEDT-STF分子的富集Br，以及掺杂有丰富的BEDT-STF分子的天然Br。在正常状态和超导状态下测量的核自旋晶格弛豫率的结果表明，BEDT-STF位点的潜在无序会分散反铁磁相互作用和超导库珀对。
We present the results of site-selectiveNMR spectroscopy on an organic superconductor-(BEDT-TTF)(-Br) doped with BEDT-STF molecules. We reveal microscopically the modulation of the local electronic state caused by the BEDT-STF doping from theNMR measurement on two types of samples, which areenriched-Br doped with naturally abundant BEDT-STF molecules, and natural-Br doped withenriched BEDT-STF molecules. The results of the nuclear spin-lattice relaxation ratemeasured both in the normal and superconducting state suggest that the potential disorder at the BEDT-STF sites scatters antiferromagnetic interaction and superconducting Cooper pairs.