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题名: Neutron Scattering Studies of spin excitations in hole-doped Ba0.67K0.33Fe2As2 superconductor
作者: Zhang, CL ;  Wang, M ;  Luo, HQ ;  Wang, MY ;  Liu, MS ;  Zhao, J ;  Abernathy, DL ;  Maier, TA ;  Marty, K ;  Lumsden, MD ;  Chi, SX ;  Chang, S ;  Rodriguez-Rivera, JA ;  Lynn, JW ;  Xiang, T ;  Hu, JP ;  Dai, P
刊名: SCIENTIFIC REPORTS
出版日期: 2011
卷号: 1, 期号:*, 页码:115
关键词: PAIRING SYMMETRY ;  IRON PNICTIDES ;  BA0.6K0.4FE2AS2
学科分类: Physics
通讯作者: Dai, P (reprint author), Univ Tennessee, Dept Phys & Astron, Knoxville, TN 37996 USA.
部门归属: [Zhang, Chenglin; Wang, Meng; Wang, Miaoyin; Liu, Mengshu; Zhao, Jun; Dai, Pengcheng] Univ Tennessee, Dept Phys & Astron, Knoxville, TN 37996 USA; [Wang, Meng; Luo, Huiqian; Xiang, Tao; Hu, Jiangping; Dai, Pengcheng] Chinese Acad Sci, Beijing Natl Lab Condensed Matter Phys, Inst Phys, Beijing 100190, Peoples R China; [Abernathy, D. L.; Marty, Karol; Lumsden, M. D.; Dai, Pengcheng] Oak Ridge Natl Lab, Neutron Scattering Sci Div, Oak Ridge, TN 37831 USA; [Maier, T. A.] Oak Ridge Natl Lab, Ctr Nanophase Mat Sci, Oak Ridge, TN 37831 USA; [Maier, T. A.] Oak Ridge Natl Lab, Div Math & Comp Sci, Oak Ridge, TN 37831 USA; [Chi, Songxue; Chang, Sung; Rodriguez-Rivera, Jose A.; Lynn, J. W.] Natl Inst Stand & Technol, NIST Ctr Neutron Res, Gaithersburg, MD 20899 USA; [Chi, Songxue; Rodriguez-Rivera, Jose A.] Univ Maryland, Dept Mat Sci & Engn, College Pk, MD 20899 USA; [Xiang, Tao] Chinese Acad Sci, Inst Theoret Phys, Beijing 100190, Peoples R China; [Hu, Jiangping] Purdue Univ, Dept Phys, W Lafayette, IN 47907 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.
资助者: 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
收录类别: SCI
原文出处: 查看原文
语种: 英语
WOS记录号: WOS:000296056500001
Citation statistics: 
内容类型: 期刊论文
URI标识: http://ir.itp.ac.cn/handle/311006/14251
Appears in Collections:理论物理所2011年知识产出_期刊论文

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Recommended Citation:
Zhang, CL,Wang, M,Luo, HQ,et al. Neutron Scattering Studies of spin excitations in hole-doped Ba0.67K0.33Fe2As2 superconductor[J]. SCIENTIFIC REPORTS,2011,1(*):115.
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