NMR and NQR studies on superconducting Sr2RuO4
NMR and NQR studies on superconducting Sr2RuO4
复制标题
超导 Sr2RuO4 的 NMR 和 NQR 研究
DOI：
10.1016/j.jpcs.2008.06.028
复制
发表时间：
2008
影响因子：
4
通讯作者：
Y. Maeno
中科院分区：
文献类型：
--
作者：
K. Ishida;H. Murakawa;H. Mukuda;Y. Kitaoka;Z. Mao;Y. Maeno
我们回顾了我们在超导Sr2RuO4中的核磁共振(NMR)和核四极共振(NQR)研究，这些研究是为了研究超导态的能隙结构和配对对称性以及正常态的磁涨落。当T_c-∼为1.5K时，高质量样品的自旋-晶格驰豫速率(1/T_1)急剧下降，没有在T_c以下出现相干峰，随后T_3行为下降到0.15K。这一结果表明，纯Sr2RuO4的超导带隙是具有线-节点带隙的高度各向异性的特征。在超导状态下，与自旋磁化率有关的奈特移位不变，与外加磁场的方向和不同的磁场大小无关。这一结果强烈地表明超导对处于自旋-三重态，并且认为三重态对的自旋方向被几百Oe的小场所改变。
We review our nuclear-magnetic resonance (NMR) and nuclear-quadrupole-resonance (NQR) studies in superconducting Sr2RuO4, which have been performed in order to investigate the gap structure and the pairing symmetry in the superconducting state and magnetic fluctuations in the normal state. The spin-lattice relaxation rate (1/T1) of a high-quality sample with Tc∼1.5K shows a sharp decrease without a coherence peak just below Tc, followed by a T3behavior down to 0.15K. This result indicates that the superconducting gap in pure Sr2RuO4is a highly anisotropic character with a line-node gap. The Knight shift, which is related to the spin susceptibility, is unchanged in the superconducting state irrespective of the direction of the applied fields and various magnitude of the field. This result strongly suggests that the superconducting pairs are in the spin-triplet state, and the spin direction of the triplet pairs is considered to be changed by small fields of several hundred Oe.
Sr2RuO4 的 17O-NMR 研究
DOI：
--
发表时间：
2021
期刊：
影响因子：
--
作者：
Horikawa Takahito;Nomura Daiki;Kanna Naoya;Fukamachi Yasushi;Sugiyama Shin;Kenji ISHIDA
通讯作者：
Kenji ISHIDA
影响因子：
8.6
作者：
Deguchi, K;Mao, ZQ;Maeno, Y
通讯作者：
Maeno, Y