Magnetic anisotropy in hole-doped superconducting Ba0.67K0.33Fe2As2 probed by polarized inelastic neutron scattering
文献类型：期刊论文
| 作者 | Zhang, CL ; Liu, MS ; Su, YX ; Regnault, LP ; Wang, M ; Tan, GT ; Bruckel, T ; Egami, T ; Dai, PC |
| 刊名 | PHYSICAL REVIEW B
 |
| 出版日期 | 2013 |
| 卷号 | 87期号:8 |
| ISSN号 | 1098-0121 |
| 通讯作者 | Zhang, CL (reprint author), Univ Tennessee, Dept Phys & Astron, Knoxville, TN 37996 USA. |
| 中文摘要 | We use polarized inelastic neutron scattering ( INS) to study spin excitations of optimally hole-doped superconductor Ba0.67K0.33Fe2As2 (T-c = 38 K). In the normal state, the imaginary part of the dynamic susceptibility, chi ''(Q,omega), shows magnetic anisotropy for energies below similar to 7 meV with c-axis polarized spin excitations larger than that of the in-plane component. Upon entering into the superconducting state, previous unpolarized INS experiments have shown that spin gaps at similar to 5 and 0.75 meV open at wave vectors Q = (0.5,0.5,0) and (0.5,0.5,1), respectively, with a broad neutron spin resonance at E-r = 15 meV. Our neutron polarization analysis reveals that the large difference in spin gaps is purely due to different spin gaps in the c axis and in-plane polarized spin excitations, resulting in a resonance with different energy widths for the c-axis and in-plane spin excitations. The observation of spin anisotropy in both optimally electron- and hole-doped BaFe2As2 is due to their proximity to the AF ordered BaFe2As2 where spin anisotropy exists below T-N. DOI: 10.1103/PhysRevB.87.081101 |
| 资助信息 | US DOE BES [DE-FG02-05ER46202]; US DOE BES through the EPSCoR grant [DE-FG02-08ER46528]; MOST of China 973 program [2012CB821400] |
| 语种 | 英语 |
| 公开日期 | 2014-01-16 |
| 源URL | [http://ir.iphy.ac.cn/handle/311004/57184]  |
| 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, CL,Liu, MS,Su, YX,et al. Magnetic anisotropy in hole-doped superconducting Ba0.67K0.33Fe2As2 probed by polarized inelastic neutron scattering[J]. PHYSICAL REVIEW B,2013,87(8). |
| APA | Zhang, CL.,Liu, MS.,Su, YX.,Regnault, LP.,Wang, M.,...&Dai, PC.(2013).Magnetic anisotropy in hole-doped superconducting Ba0.67K0.33Fe2As2 probed by polarized inelastic neutron scattering.PHYSICAL REVIEW B,87(8). |
| MLA | Zhang, CL,et al."Magnetic anisotropy in hole-doped superconducting Ba0.67K0.33Fe2As2 probed by polarized inelastic neutron scattering".PHYSICAL REVIEW B 87.8(2013). |
入库方式： OAI收割
来源：物理研究所
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