Controllable effects of quantum fluctuations on spin free-induction decay at room temperature
文献类型：期刊论文
| 作者 | Liu, GQ ; Pan, XY ; Jiang, ZF ; Zhao, N ; Liu, RB |
| 刊名 | SCIENTIFIC REPORTS
 |
| 出版日期 | 2012 |
| 卷号 | 2 |
| 关键词 | MAGNETIC-RESONANCE COHERENT DYNAMICS DIAMOND DECOHERENCE MAGNETOMETRY ELECTRON BATH |
| ISSN号 | 2045-2322 |
| 通讯作者 | Pan, XY: Chinese Acad Sci, Inst Phys, Beijing Natl Lab Condensed Matter Phys, Beijing 100190, Peoples R China. |
| 中文摘要 | Although iron-based superconductors are multiorbital systems with complicated band structures, we demonstrate that the low-energy physics which is responsible for their high-T-c superconductivity is essentially governed by an effective two-orbital Hamiltonian near half filling. This underlying electronic structure is protected by the S-4 symmetry. With repulsive or strong next-nearest-neighbor antiferromagnetic exchange interactions, the model results in a robust A(1g) s-wave pairing which can be mapped exactly to the d-wave pairing observed in cuprates. The classification of the superconducting (SC) states according to the S4 symmetry leads to a natural prediction of the existence of two different phases, named the A and B phases. In the B phase, the superconducting order has an overall sign change along the c axis between the top and bottom As (or Se) planes in a single Fe-As (or Fe-Se) trilayer structure, the common building block of iron-based superconductors. The sign change is analogous to the sign change in the d-wave superconducting state of cuprates upon 90 degrees rotation. Our derivation provides a unified understanding of iron pnictides and iron chalcogenides, and suggests that cuprates and iron-based superconductors share an identical high-T-c superconducting mechanism. |
| 收录类别 | SCI |
| 资助信息 | National Basic Research Program of China (973 Program) [2009CB929103]; National Natural Science Foundation of China [10974251, 11028510]; Hong Kong Research Grants Council [CUHK402208, CUHK402410]; Chinese University of Hong Kong |
| 语种 | 英语 |
| 公开日期 | 2013-09-17 |
| 源URL | [http://ir.iphy.ac.cn/handle/311004/35107]  |
| 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 | Liu, GQ,Pan, XY,Jiang, ZF,et al. Controllable effects of quantum fluctuations on spin free-induction decay at room temperature[J]. SCIENTIFIC REPORTS,2012,2. |
| APA | Liu, GQ,Pan, XY,Jiang, ZF,Zhao, N,&Liu, RB.(2012).Controllable effects of quantum fluctuations on spin free-induction decay at room temperature.SCIENTIFIC REPORTS,2. |
| MLA | Liu, GQ,et al."Controllable effects of quantum fluctuations on spin free-induction decay at room temperature".SCIENTIFIC REPORTS 2(2012). |
入库方式： OAI收割
来源：物理研究所
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