Magnetic field dependence of spin-lattice relaxation in the s(+/-) state of Ba0.67K0.33Fe2As2
文献类型：期刊论文
| 作者 | Oh, S ; Mounce, AM ; Halperin, WP ; Zhang, CL ; Dai, PC ; Reyes, AP ; Kuhns, PL |
| 刊名 | PHYSICAL REVIEW B
 |
| 出版日期 | 2012 |
| 卷号 | 85期号:17 |
| 关键词 | MIXED-STATE VORTEX SUPERCONDUCTORS DIFFUSION VORTICES |
| ISSN号 | 1098-0121 |
| 通讯作者 | Oh, S: Northwestern Univ, Dept Phys & Astron, Evanston, IL 60208 USA. |
| 中文摘要 | The spatially averaged density of states < N(0)> of an unconventional d-wave superconductor is magnetic field dependent, proportional to H-1/2, owing to the Doppler shift of quasiparticle excitations in a background of vortex supercurrents [G. E. Volovik, J. Phys. C 21, L221 (1988); JETP Lett. 58, 469 (1993)]. This phenomenon, called the Volovik effect, has been predicted to exist for a sign-changing s(+/-) state [Y. Bang, Phys. Rev. Lett. 104, 217001 (2010)], although it is absent in a single-band s-wave superconductor. Consequently, we expect there to be Doppler contributions to the NMR spin-lattice relaxation rate, 1/T-1 proportional to < N(0)(2)>, for an s(perpendicular to) state which will depend on the magnetic field. We have measured the As-75 1/T-1 in a high-quality single crystal of Ba0.67K0.33Fe2As2 over a wide range of field up to 28 T. Our spatially resolved measurements show that indeed there are Doppler contributions to 1/T-1 which increase closer to the vortex core, with a spatial average proportional to H-2, inconsistent with recent theory [Y. Bang, Phys. Rev. B 85, 104524 (2012)]. |
| 收录类别 | SCI |
| 资助信息 | US Department of Energy, Office of Basic Energy Sciences, Division of Materials Sciences and Engineering [DE-FG02-05ER46248, DE-FG02-05ER46202]; National Science Foundation; State of Florida |
| 语种 | 英语 |
| 公开日期 | 2013-09-18 |
| 源URL | [http://ir.iphy.ac.cn/handle/311004/41207]  |
| 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 | Oh, S,Mounce, AM,Halperin, WP,et al. Magnetic field dependence of spin-lattice relaxation in the s(+/-) state of Ba0.67K0.33Fe2As2[J]. PHYSICAL REVIEW B,2012,85(17). |
| APA | Oh, S.,Mounce, AM.,Halperin, WP.,Zhang, CL.,Dai, PC.,...&Kuhns, PL.(2012).Magnetic field dependence of spin-lattice relaxation in the s(+/-) state of Ba0.67K0.33Fe2As2.PHYSICAL REVIEW B,85(17). |
| MLA | Oh, S,et al."Magnetic field dependence of spin-lattice relaxation in the s(+/-) state of Ba0.67K0.33Fe2As2".PHYSICAL REVIEW B 85.17(2012). |
入库方式： OAI收割
来源：物理研究所
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