Integer and half-integer flux-quantum transitions in a niobium-iron pnictide loop
文献类型：期刊论文
| 作者 | Chen, CT ; Tsuei, CC ; Ketchen, MB ; Ren, ZA ; Zhao, ZX |
| 刊名 | NATURE PHYSICS
 |
| 出版日期 | 2010 |
| 卷号 | 6期号:4页码:260 |
| 关键词 | PAIRING SYMMETRY SUPERCONDUCTIVITY BA0.6K0.4FE2AS2 |
| ISSN号 | 1745-2473 |
| 通讯作者 | Chen, CT: IBM Corp, Thomas J Watson Res Ctr, Yorktown Hts, NY 10598 USA. |
| 中文摘要 | The recent discovery of iron-based superconductors(1-3) challenges the existing paradigm of high-temperature superconductivity. Owing to their unusual multi-orbital band structure(4,5), magnetism(6) and electron correlation(7), theories propose a unique sign-reversed s-wave pairing state, with the order parameter changing sign between the electron and hole Fermi pockets(8-14). However, because of the complex Fermi surface topology and materials-related issues, the predicted sign reversal remains unconfirmed. Here we report a new phase-sensitive technique for probing unconventional pairing symmetry in the polycrystalline iron pnictides. Through the observation of both integer and half-integer flux-quantum transitions in composite niobium-iron pnictide loops, we provide the first phase-sensitive evidence of the sign change of the order parameter in NdFeAsO(0.88)F(0.12), lending strong support for microscopic models predicting unconventional s-wave pairing symmetry(9-14). These findings have important implications on the mechanism of iron pnictide superconductivity, and lay the groundwork for future studies of new physics arising from the exotic order in the FeAs-based superconductors. |
| 收录类别 | SCI |
| 语种 | 英语 |
| 公开日期 | 2013-09-18 |
| 源URL | [http://ir.iphy.ac.cn/handle/311004/40051]  |
| 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 | Chen, CT,Tsuei, CC,Ketchen, MB,et al. Integer and half-integer flux-quantum transitions in a niobium-iron pnictide loop[J]. NATURE PHYSICS,2010,6(4):260. |
| APA | Chen, CT,Tsuei, CC,Ketchen, MB,Ren, ZA,&Zhao, ZX.(2010).Integer and half-integer flux-quantum transitions in a niobium-iron pnictide loop.NATURE PHYSICS,6(4),260. |
| MLA | Chen, CT,et al."Integer and half-integer flux-quantum transitions in a niobium-iron pnictide loop".NATURE PHYSICS 6.4(2010):260. |
入库方式： OAI收割
来源：物理研究所
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