Magnetic order close to superconductivity in the iron-based layered LaO(1-x)F(x)FeAs systems

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	Magnetic order close to superconductivity in the iron-based layered LaO(1-x)F(x)FeAs systems
	de la Cruz, C ; Huang, Q ; Lynn, JW ; Li, JY ; Ratcliff, W ; Zarestky, JL ; Mook, HA ; Chen, GF ; Luo, JL ; Wang, NL ; Dai, PC
刊名	NATURE
	2008
卷号	453 期号:7197 页码:899
ISSN号	0028-0836
通讯作者	Dai, PC: Univ Tennessee, Dept Phys & Astron, Knoxville, TN 37996 USA.
中文摘要	Following the discovery of long- range antiferromagnetic order in the parent compounds of high- transition- temperature ( high- T(c)) copper oxides(1,2), there have been efforts to understand the role of magnetism in the superconductivity that occurs when mobile 'electrons' or 'holes' are doped into the antiferromagnetic parent compounds. Superconductivity in the newly discovered rare- earth iron- based oxide systems ROFeAs ( R, rare- earth metal) also arises from either electron(3-7) or hole(8) doping of their non- superconducting parent compounds. The parent material LaOFeAs is metallic but shows anomalies near 150 K in both resistivity and d. c. magnetic susceptibility(3). Although optical conductivity and theoretical calculations suggest that LaOFeAs exhibits a spin- density- wave ( SDW) instability that is suppressed by doping with electrons to induce superconductivity(9), there has been no direct evidence of SDW order. Here we report neutron- scattering experiments that demonstrate that LaOFeAs undergoes an abrupt structural distortion below 155 K, changing the symmetry from tetragonal ( space group P4/ nmm) to monoclinic ( space group P112/ n) at low temperatures, and then, at similar to 137 K, develops long- range SDW- type antiferromagnetic order with a small moment but simple magnetic structure(9). Doping the system with fluorine suppresses both the magnetic order and the structural distortion in favour of superconductivity. Therefore, like high- T(c) copper oxides, the superconducting regime in these iron- based materials occurs in close proximity to a long- range- ordered antiferromagnetic ground state.
收录类别	SCI
语种	英语
公开日期	2013-09-18
内容类型	期刊论文
源URL	[http://ir.iphy.ac.cn/handle/311004/41260]
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	de la Cruz, C,Huang, Q,Lynn, JW,et al. Magnetic order close to superconductivity in the iron-based layered LaO(1-x)F(x)FeAs systems[J]. NATURE,2008,453(7197):899.
APA	de la Cruz, C.,Huang, Q.,Lynn, JW.,Li, JY.,Ratcliff, W.,...&Dai, PC.(2008).Magnetic order close to superconductivity in the iron-based layered LaO(1-x)F(x)FeAs systems.NATURE,453(7197),899.
MLA	de la Cruz, C,et al."Magnetic order close to superconductivity in the iron-based layered LaO(1-x)F(x)FeAs systems".NATURE 453.7197(2008):899.