Anomalous Low-Field Diamagnetic Response in Ultraclean URu_2Si_2 Superconductor
Anomalous Low-Field Diamagnetic Response in Ultraclean URu_2Si_2 Superconductor
复制标题
超净URu_2Si_2超导体中的异常低场抗磁响应
DOI：
10.1088/1742-6596/273/1/012081
复制
发表时间：
2011
期刊：
影响因子：
--
通讯作者：
T. Shibauchi and Y. Matsuda
中科院分区：
文献类型：
--
作者：
R. Okazaki;M. Shimozawa;H. Shishido;M. Konczykowski;Y. Haga;T. D. Matsuda;E. Yamamoto;Y. Onuki;Y. Yanase;T. Shibauchi and Y. Matsuda
The lower critical field H cl in ultraclean URu 2 Si 2 single crystals (T c= 1.4 K) with residual resistivity ratio exceeding 700 is precisely determined by the positional dependence of the local magnetic induction measured down to 55mK. We show that the whole H cl (T) for H|| a can be explained by the two gaps with line and point nodes. In contrast, for H|| c we find a distinct kink in the slope of H c1 at 1.2 K, which cannot be accounted for by the two gaps. This outstanding anomaly demonstrates a highly unusual superconducting state embedded in the hidden order state of URu 2 Si 2 possibly related to the time reversal symmetry breaking.
