Experimental elucidation of the origin of the 'double spin resonances' in ba(fe1-xcox)(2)as-2
文献类型：期刊论文
| 作者 | Wang, Meng1; Yi, M.1; Sun, H. L.2; Valdivia, P.1; Kim, M. G.3; Xu, Z. J.1; Berlijn, T.4,5; Christianson, A. D.6; Chi, Songxue6; Hashimoto, M.7 |
| 刊名 | Physical review b
 |
| 出版日期 | 2016-05-26 |
| 卷号 | 93期号:20页码:7 |
| ISSN号 | 2469-9950 |
| DOI | 10.1103/physrevb.93.205149 |
| 通讯作者 | Wang, meng(wangm@berkeley.edu) ; Yi, m.(mingyi@berkeley.edu) |
| 英文摘要 | We report a combined study of the spin resonances and superconducting gaps for underdoped (t-c = 19 k), optimally doped (t-c = 25 k), and overdoped (t-c = 19 k) ba(fe1-xcox)(2)as-2 single crystalswith inelastic neutron scattering and angle resolved photoemission spectroscopy. we find a quasi-two-dimensional spin resonance whose energy scales with the superconducting gap in all three compounds. in addition, anisotropic low energy spin excitation enhancements in the superconducting state have been deduced and characterized for the under and optimally doped compounds. our data suggest that the quasi-two-dimensional spin resonance is a spin exciton that corresponds to the spin singlet-triplet excitations of the itinerant electrons. however, the intensity enhancements of the anisotropic spin excitations are dominated by the out-of-plane spin excitations of the ordered moments due to the suppression of damping in the superconducting state. hence we offer an interpretation of the double energy scales differing from previous interpretations based on anisotropic superconducting energy gaps and systematically explain the doping-dependent trend across the phase diagram. |
| WOS关键词 | IRON-BASED SUPERCONDUCTORS ; T-C SUPERCONDUCTORS ; NEUTRON-SCATTERING ; EXCITATIONS |
| WOS研究方向 | Physics |
| WOS类目 | Physics, Condensed Matter |
| 语种 | 英语 |
| WOS记录号 | WOS:000376638700003 |
| 出版者 | AMER PHYSICAL SOC |
| URI标识 | http://www.irgrid.ac.cn/handle/1471x/2176536 |
| 专题 | 高能物理研究所 |
| 通讯作者 | Wang, Meng; Yi, M. |
| 作者单位 | 1.Univ Calif Berkeley, Dept Phys, Berkeley, CA 94720 USA 2.Chinese Acad Sci, Beijing Synchrotron Radiat Facil, Inst High Energy Phys, Beijing 100049, Peoples R China 3.Univ Calif Berkeley, Lawrence Berkeley Natl Lab, Div Mat Sci, Berkeley, CA 94720 USA 4.Oak Ridge Natl Lab, Ctr Nanophase Mat Sci, Oak Ridge, TN 37831 USA 5.Oak Ridge Natl Lab, Comp Sci & Math Div, Oak Ridge, TN 37831 USA 6.Oak Ridge Natl Lab, Quantum Condensed Matter Div, Oak Ridge, TN 37831 USA 7.SLAS Natl Accelerator Lab, Stanford Synchrotron Radiat Lightsource, Menlo Pk, CA 94025 USA 8.Rice Univ, Dept Phys & Astron, Houston, TX 77005 USA 9.Univ Calif Berkeley, Dept Mat Sci & Engn, Berkeley, CA 94720 USA |
| 推荐引用方式 GB/T 7714 | Wang, Meng,Yi, M.,Sun, H. L.,et al. Experimental elucidation of the origin of the 'double spin resonances' in ba(fe1-xcox)(2)as-2[J]. Physical review b,2016,93(20):7. |
| APA | Wang, Meng.,Yi, M..,Sun, H. L..,Valdivia, P..,Kim, M. G..,...&Birgeneau, R. J..(2016).Experimental elucidation of the origin of the 'double spin resonances' in ba(fe1-xcox)(2)as-2.Physical review b,93(20),7. |
| MLA | Wang, Meng,et al."Experimental elucidation of the origin of the 'double spin resonances' in ba(fe1-xcox)(2)as-2".Physical review b 93.20(2016):7. |
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