Unusual Normal and Superconducting State Properties Observed in Hydrothermal Fe_(1-δ)Se Flakes

作     者：Shaobo Liu Sheng Ma Zhaosheng Wang Wei Hu Zian Li Qimei Liang Hong Wang Yuhang Zhang Zouyouwei Lu Jie Yuan Kui Jin Jian-Qi Li Li Pi Li Yu Fang Zhou Xiaoli Dong Zhongxian Zhao 刘少博;马晟;王钊胜;胡卫;李子安;梁起美;王鸿;张宇航;鲁邹有为;袁洁;金魁;李建奇;皮雳;俞理;周放;董晓莉;赵忠贤

作者机构：Beijing National Laboratory for Condensed Matter Physics and Institute of PhysicsChinese Academy of SciencesBeijing 100190China School of Physical SciencesUniversity of Chinese Academy of SciencesBeijing 100049China Anhui Province Key Laboratory of Condensed Matter Physics at Extreme ConditionsHigh Magnetic Field Laboratory of the Chinese Academy of SciencesHefei 230031China Key Laboratory for Vacuum PhysicsUniversity of Chinese Academy of SciencesBeijing 100049China Songshan Lake Materials LaboratoryDongguan 523808China 

出 版 物：《Chinese Physics Letters》 (中国物理快报（英文版）)

年 卷 期：2021年第38卷第5期

页      面：109-113页

核心收录：

学科分类：080705[工学-制冷及低温工程] 07[理学] 070205[理学-凝聚态物理] 08[工学] 0807[工学-动力工程及工程热物理] 0702[理学-物理学] 

基　　金：Supported by the National Key Research and Development Program of China (Grant Nos.2016YFA0300300 and 2017YFA0303003) the National Natural Science Foundation of China (Grant Nos.12061131005,11834016 and 11888101) the Strategic Priority Research Program of Chinese Academy of Sciences (Grant No.XDB25000000) the Strategic Priority Research Program and Key Research Program of Frontier Sciences of the Chinese Academy of Sciences (Grant Nos.QYZDY-SSW-SLH001) 

主　　题：red CVT Unusual Normal and Superconducting State Properties Observed in Hydrothermal Fe Se Flakes 

摘      要：The electronic and superconducting properties of Fe_(1-δ)Se single-crystal flakes grown hydrothermally are studied by the transport measurements under zero and high magnetic fields up to 38.5 *** results contrast sharply with those previously reported for nematically ordered Fe Se by chemical-vapor-transport(CVT)*** signature of the electronic nematicity,but an evident metal-to-nonmetal crossover with increasing temperature,is detected in the normal state of the present hydrothermal ***,a higher superconducting critical temperature T_c of 13.2 K is observed compared to a suppressed T_c of 9 K in the presence of the nematicity in the CVT Fe ***,the upper critical field in the zero-temperature limit is found to be isotropic with respect to the field direction and to reach a higher value of-42 T,which breaks the Pauli limit by a factor of 1.8.