Investigation of the Vortex States of Sr2RuO4-Ru Eutectic Microplates Using DC-SQUIDs
Investigation of the Vortex States of Sr2RuO4-Ru Eutectic Microplates Using DC-SQUIDs
复制标题
使用 DC-SQUID 研究 Sr2RuO4-Ru 共晶微板的涡旋态
DOI：
10.1088/1742-6596/969/1/012040
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发表时间：
2018
期刊：
影响因子：
--
通讯作者：
Y. Maeno and H. Takayanagi
中科院分区：
文献类型：
--
作者：
Y. Nago;D. Sakuma;R. Ishiguro;S. Kashiwaya;S. Nomura;K. Kono;Y. Maeno and H. Takayanagi
我们报告的Sr 2 RuO 4-Ru共晶微板使用微型直流SQUID的磁化测量。Sr 2 RuO 4被认为是一种手征p波超导体，因此Sr 2 RuO 4-Ru共晶处于不稳定状态，在Sr 2 RuO 4的手征p波态和Ru的s波态之间存在超导相阻挫.为了补偿挫折，在足够低的温度下，在Ru夹杂物的中心自发地形成单个量子涡旋。然而，这样的自发涡旋态还没有被实验观察到。在本研究中，我们制备了一个微型dc-SQUID和一个中心含有单一Ru夹杂的Sr 2 RuO 4-Ru共晶微片。我们进行了磁化测量低于超导转变温度的Ru夹杂物，以调查自发的Ru中心涡旋状态。
We report magnetization measurements of Sr 2 RuO 4-Ru eutectic microplates using micro-dc-SQUIDs. Sr 2 RuO 4 is considered as a chiral p-wave superconductor and hence Sr 2 RuO 4-Ru eutectic becomes in an unstable state with a superconducting phase frustration between a chiral p-wave state of Sr 2 RuO 4 and a s-wave state of Ru. To compensate the frustration, a single quantum vortex is spontaneously formed at the center of the Ru inclusion at sufficiently low temperatures. However, such a spontaneous vortex state has not been experimentally observed yet. In this study, we prepared a micro-dc-SQUID and a Sr 2 RuO 4-Ru eutectic microplate containing a single Ru-inclusion at the center of the microplate. We performed magnetization measurements down below the superconducting transition temperature of the Ru inclusion to investigate the spontaneous Ru-center vortex state.