Short-range cluster spin glass near optimal superconductivity in BaFe2-xNixAs2

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	Short-range cluster spin glass near optimal superconductivity in BaFe2-xNixAs2
	Lu, XY ; Tam, DW ; Zhang, CL ; Luo, HQ ; Wang, M ; Zhang, R ; Harriger, LW ; Keller, T ; Keimer, B ; Regnault, LP ; Maier, TA ; Dai, PC
刊名	PHYSICAL REVIEW B
	2014
卷号	90 期号:2
ISSN号	1098-0121
通讯作者	Lu, XY (reprint author), Chinese Acad Sci, Beijing Natl Lab Condensed Matter Phys, Inst Phys, Beijing 100190, Peoples R China.
中文摘要	High-temperature superconductivity in iron pnictides occurs when electrons are doped into their antiferromagnetic (AF) parent compounds. In addition to inducing superconductivity, electron doping also changes the static commensurate AF order in the undoped parent compounds into short-range incommensurate AF order near optimal superconductivity. Here we use neutron scattering to demonstrate that the incommensurate AF order in BaFe2-xNixAs2 is not a spin-density wave arising from the itinerant electrons in nested Fermi surfaces, but is consistent with a cluster spin glass in the matrix of the superconducting phase. Therefore, optimal superconductivity in iron pnictides coexists and competes with a mesoscopically separated cluster spin glass phase, much different from the homogeneous coexisting AF and superconducting phases in the underdoped regime.
资助信息	MOST [2012CB821400, 2011CBA00110]; NSFC [11374011, 91221303]; NPL, CAEP [2013DB03]; US (Rice University) [NSF-DMR-1308603]; US (Oak Ridge National Laboratory) [NSF-DMR-1308603]; Robert A. Welch Foundation at Rice University [C-1839]
语种	英语
公开日期	2015-04-14
内容类型	期刊论文
源URL	[http://ir.iphy.ac.cn/handle/311004/59530]
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	Lu, XY,Tam, DW,Zhang, CL,et al. Short-range cluster spin glass near optimal superconductivity in BaFe2-xNixAs2[J]. PHYSICAL REVIEW B,2014,90(2).
APA	Lu, XY.,Tam, DW.,Zhang, CL.,Luo, HQ.,Wang, M.,...&Dai, PC.(2014).Short-range cluster spin glass near optimal superconductivity in BaFe2-xNixAs2.PHYSICAL REVIEW B,90(2).
MLA	Lu, XY,et al."Short-range cluster spin glass near optimal superconductivity in BaFe2-xNixAs2".PHYSICAL REVIEW B 90.2(2014).