(Li0.84Fe0.16)OHFe0.98Se superconductor: Ion-exchange synthesis of large   single-crystal and highly two-dimensional electron properties

doi:10.1103/PhysRevB.92.064515

CORC > 北京大学 > 化学与分子工程学院

	(Li0.84Fe0.16)OHFe0.98Se superconductor: Ion-exchange synthesis of large single-crystal and highly two-dimensional electron properties
	Dong, Xiaoli ; Jin, Kui ; Yuan, Dongna ; Zhou, Huaxue ; Yuan, Jie ; Huang, Yulong ; Hua, Wei ; Sun, Junliang ; Zheng, Ping ; Hu, Wei ; Mao, Yiyuan ; Ma, Mingwei ; Zhang, Guangming ; Zhou, Fang ; Zhao, Zhongxian
刊名	PHYSICAL REVIEW B
	2015
关键词	HIGH-TEMPERATURE SUPERCONDUCTIVITY IRON SELENIDE PHASE-DIAGRAM SPIN FESE DEPENDENCE FILMS
DOI	10.1103/PhysRevB.92.064515
英文摘要	A large and high-quality single crystal (Li0.84Fe0.16)OHFe0.98Se, the optimal superconductor of a reported (Li1-xFex)OHFe1-ySe system, has been successfully synthesized via a hydrothermal ion-exchange technique. The superconducting transition temperature (T-c) of 42 K is determined by magnetic susceptibility and electric resistivity measurements, and the zero-temperature upper critical magnetic fields are evaluated as 79 and 313 T for the field along the c axis and the ab plane, respectively. The ratio of out-of-plane to in-plane electric resistivity rho(c)/rho(ab) is found to increase with decreasing temperature and to reach a high value of 2500 at 50 K, with an evident kink occurring at a characteristic temperature T* = 120 K. The negative in-plane Hall coefficient indicates that electron carriers dominate in the charge transport, and the hole contribution is significantly reduced as the temperature is lowered to approach T . From T down to T-c we observe the linear temperature dependencies of the in-plane electric resistivity and the magnetic susceptibility for the FeSe layers. Our findings thus reveal that the normal state of (Li0.84Fe0.16)OHFe0.98Se becomes highly two dimensional and anomalous prior to the superconducting transition, providing an insight into the mechanism of high-T-c superconductivity.; National Basic Research Program of China [2013CB921700]; Chinese Academy of Sciences [XDB07020100]; Natural Science Foundation of China [11274358, 11190020, 91222107]; SCI(E); ARTICLE; dong@iphy.ac.cn; fzhou@iphy.ac.cn; zhxzhao@iphy.ac.cn; 6; 92
语种	英语
内容类型	期刊论文
源URL	[http://ir.pku.edu.cn/handle/20.500.11897/417103]
专题	化学与分子工程学院
推荐引用方式 GB/T 7714	Dong, Xiaoli,Jin, Kui,Yuan, Dongna,et al. (Li0.84Fe0.16)OHFe0.98Se superconductor: Ion-exchange synthesis of large single-crystal and highly two-dimensional electron properties[J]. PHYSICAL REVIEW B,2015.
APA	Dong, Xiaoli.,Jin, Kui.,Yuan, Dongna.,Zhou, Huaxue.,Yuan, Jie.,...&Zhao, Zhongxian.(2015).(Li0.84Fe0.16)OHFe0.98Se superconductor: Ion-exchange synthesis of large single-crystal and highly two-dimensional electron properties.PHYSICAL REVIEW B.
MLA	Dong, Xiaoli,et al."(Li0.84Fe0.16)OHFe0.98Se superconductor: Ion-exchange synthesis of large single-crystal and highly two-dimensional electron properties".PHYSICAL REVIEW B (2015).