Neutron Scattering Studies of spin excitations in hole-doped Ba0.67K0.33Fe2As2 superconductor

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	Neutron Scattering Studies of spin excitations in hole-doped Ba0.67K0.33Fe2As2 superconductor
	Xiang, T
刊名	SCIENTIFIC REPORTS
	2011
卷号	1 期号:*页码:115
关键词	PAIRING SYMMETRY IRON PNICTIDES BA0.6K0.4FE2AS2
ISSN号	2045-2322
通讯作者	Dai, P (reprint author), Univ Tennessee, Dept Phys & Astron, Knoxville, TN 37996 USA.
英文摘要	We report inelastic neutron scattering experiments on single crystals of superconducting Ba0.67K0.33Fe2As2 (T-c = 538 K). In addition to confirming the resonance previously found in powder samples, we find that spin excitations in the normal state form longitudinally elongated ellipses along the Q(AFM) direction in momentum space, consistent with density functional theory predictions. On cooling below T-c, while the resonance preserves its momentum anisotropy as expected, spin excitations at energies below the resonance become essentially isotropic in the in-plane momentum space and dramatically increase their correlation length. These results suggest that the superconducting gap structures in Ba(0.67)Ka(0.33)Fe(2)As(2) are more complicated than those suggested from angle resolved photoemission experiments.
学科主题	Physics
收录类别	SCI
资助信息	US Department of Energy, Division of Materials Science, Basic Energy Sciences [DOE DE-FG02-05ER46202]; US Department of Energy, Division of Scientific User Facilities, Basic Energy Sciences; National Science Foundation [DMR-0454672, DMR-0944772]; Chinese Academy of Sciences; Center for Nanophase Materials Sciences; ORNL by Basic Energy Sciences, U.S. DOE
原文出处	http://dx.doi.org/10.1038/srep00115
语种	英语
WOS记录号	WOS:000296056500001
公开日期	2013-05-17
内容类型	期刊论文
源URL	[http://ir.itp.ac.cn/handle/311006/14251]
专题	理论物理研究所_理论物理所1978-2010年知识产出
推荐引用方式 GB/T 7714	Xiang, T. Neutron Scattering Studies of spin excitations in hole-doped Ba0.67K0.33Fe2As2 superconductor[J]. SCIENTIFIC REPORTS,2011,1(*):115.
APA	Xiang, T.(2011).Neutron Scattering Studies of spin excitations in hole-doped Ba0.67K0.33Fe2As2 superconductor.SCIENTIFIC REPORTS,1(*),115.
MLA	Xiang, T."Neutron Scattering Studies of spin excitations in hole-doped Ba0.67K0.33Fe2As2 superconductor".SCIENTIFIC REPORTS 1.*(2011):115.