Evidence of antiferromagnetic fluctuation in the unconventional superconductor λ-(BETS)2GaCl4 by C13 NMR
Evidence of antiferromagnetic fluctuation in the unconventional superconductor λ-(BETS)2GaCl4 by C13 NMR
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通过 C13 NMR 证明非常规超导体 λ-(BETS)2GaCl4 中的反铁磁涨落
DOI：
10.1103/physrevb.96.125115
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发表时间：
2017
影响因子：
3.7
通讯作者：
Kawamoto A.
中科院分区：
文献类型：
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作者：
Kobayashi T.;Kawamoto A.
我们对这种非常规的有机超导体进行了核磁共振测量，以阐明其在顺磁状态下的电子性质。我们发现，自旋晶格弛豫速率除以temperatureshows居里样增强高于55 K的反铁磁波动所产生的。此外，我们还发现在10 K以下的温度下，由于Knight位移的减小，谱线宽度变宽，从而产生了额外的增强效应。这一结果可以用费米面嵌套引起的磁涨落来解释。我们发现盐本身就表现出两种不同类型的磁波动。
We performedNMR measurements on the unconventional organic superconductorto clarify its electronic properties in the paramagnetic state. We found that the spin-lattice relaxation rate divided by temperatureshows Curie-like enhancement above 55 K that arises from an antiferromagnetic fluctuation. In addition, we found additional enhancement ofbelow 10 K, where the Knight shift decreases and the linewidth of NMR spectra is broadened. The result could be understood by the magnetic fluctuation induced by the nesting of the Fermi surface. We discovered thatsalt inherently exhibits the two different types of magnetic fluctuations.