As-75 NMR study of single crystals of the heavily overdoped pnictide superconductors Ba1-xKxFe2As2 (x=0.7 and 1)

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	As-75 NMR study of single crystals of the heavily overdoped pnictide superconductors Ba1-xKxFe2As2 (x=0.7 and 1)
	Zhang, SW ; Ma, L ; Hou, YD ; Zhang, J ; Xia, TL ; Chen, GF ; Hu, JP ; Luke, GM ; Yu, W
刊名	PHYSICAL REVIEW B
	2010
卷号	81 期号:1
关键词	COEXISTENCE GAPS
ISSN号	1098-0121
通讯作者	Zhang, SW: Renmin Univ China, Dept Phys, Beijing 100872, Peoples R China.
中文摘要	We performed As-75 NMR studies on two overdoped high-quality Ba1-xKxFe2As2 (x=0.7 and 1.0) single crystals. In the normal states, we found a dramatic increase in the spin-lattice relaxation (1/T-75(1)) from the x =0.7 to the x=1.0 samples. In KFe2As2, the ratio of 1/(T1TKn2)-T-75, where K-75(n) is the Knight shift, increases as temperature drops. These results indicate the existence of another type of spin fluctuations in KFe2As2 which is accustomed to being treated as a simple Fermi liquid. In the superconducting state, the temperature scalings of 1/T-75(1) below T-c in the overdoped samples are significantly different from those in the under or optimally doped ones. A power-law scaling behavior 1/(T1T)-T-75 similar to T-0.5 is observed, which indicates universal strong low-energy excitations in the overdoped hole-type superconductors.
收录类别	SCI
资助信息	National Basic Research Program of China; Institute of Physics, Chinese Academy of Sciences; NSERC; CIFAR
语种	英语
公开日期	2013-09-17
内容类型	期刊论文
源URL	[http://ir.iphy.ac.cn/handle/311004/33977]
专题	物理研究所_物理所公开发表论文_物理所公开发表论文_期刊论文
推荐引用方式 GB/T 7714	Zhang, SW,Ma, L,Hou, YD,et al. As-75 NMR study of single crystals of the heavily overdoped pnictide superconductors Ba1-xKxFe2As2 (x=0.7 and 1)[J]. PHYSICAL REVIEW B,2010,81(1).
APA	Zhang, SW.,Ma, L.,Hou, YD.,Zhang, J.,Xia, TL.,...&Yu, W.(2010).As-75 NMR study of single crystals of the heavily overdoped pnictide superconductors Ba1-xKxFe2As2 (x=0.7 and 1).PHYSICAL REVIEW B,81(1).
MLA	Zhang, SW,et al."As-75 NMR study of single crystals of the heavily overdoped pnictide superconductors Ba1-xKxFe2As2 (x=0.7 and 1)".PHYSICAL REVIEW B 81.1(2010).