Upper Critical Magnetic Field far above the Paramagnetic Pair-Breaking Limit of Superconducting One-Dimensional Li0.9Mo6O17 Single Crystals
Upper Critical Magnetic Field far above the Paramagnetic Pair-Breaking Limit of Superconducting One-Dimensional Li0.9Mo6O17 Single Crystals
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远高于超导一维Li0.9Mo6O17单晶顺磁破对极限的上临界磁场
DOI：
10.1103/physrevlett.108.187003
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发表时间：
2012-05-04
影响因子：
8.6
通讯作者：
Hussey, N. E.
中科院分区：
文献类型：
--
作者：
Mercure, J. -F.;Bangura, A. F.;Hussey, N. E.
上临界场H-c2的紫青铜Li0.9Mo6O17被发现表现出很大的各向异性，在定量协议与预期从观察到的电阻率各向异性。随着磁场沿着最导电的轴排列，H-C2随着温度的降低而单调增加，达到比估计的顺磁对断裂场大5倍的值。增强H-c2调用自旋轨道散射或强耦合超导性的理论被证明是不足以解释所观察到的行为，这表明在Li 0.9Mo 6 O 17的配对状态是非常规的，可能是自旋三重态。
The upper critical field H-c2 of purple bronze Li0.9Mo6O17 is found to exhibit a large anisotropy, in quantitative agreement with that expected from the observed electrical resistivity anisotropy. With the field aligned along the most conducting axis, H-c2 increases monotonically with decreasing temperature to a value 5 times larger than the estimated paramagnetic pair-breaking field. Theories for the enhancement of H-c2 invoking spin-orbit scattering or strong-coupling superconductivity are shown to be inadequate in explaining the observed behavior, suggesting that the pairing state in Li0.9Mo6O17 is unconventional and possibly spin triplet.