Abrupt enhancement of noncentrosymmetry and appearance of a spin-triplet superconducting state in Li-2(Pd1-xPtx)(3)B beyond x=0.8
文献类型：期刊论文
| 作者 | Harada, S ; Zhou, JJ ; Yao, YG ; Inada, Y ; Zheng, GQ |
| 刊名 | PHYSICAL REVIEW B
 |
| 出版日期 | 2012 |
| 卷号 | 86期号:22 |
| 关键词 | TOPOLOGICAL INSULATORS LI2PT3B LI2PD3B |
| ISSN号 | 1098-0121 |
| 通讯作者 | Harada, S: Okayama Univ, Dept Phys, Okayama 7008530, Japan. |
| 中文摘要 | We report synthesis, Pt-195, B-11, and Li-7 NMR measurements, and first-principles band calculations for noncentrosymmetric superconductors Li-2(Pd1-xPtx)(3)B (x = 0, 0.2, 0.5, 0.8, 0.84, 0.9, and 1). For 0 <= x <= 0.8, the spin-lattice relaxation rate 1/T-1 shows a clear coherence peak just below T-c, decreasing exponentially at low temperature, and the Knight shift K-195 decreases below Tc. For x = 0.9 and 1.0, in contrast, 1/T-1 shows no coherence peak but a T-3 variation and K-195 remains unchanged across T-c. These results indicate that the superconducting state changes drastically from a spin-singlet dominant to a spin-triplet dominant state at x = 0.8. We find that the distortion of B(Pt,Pd)(6) increases abruptly above x = 0.8, which leads to an abrupt enhancement of the asymmetric spin-orbit coupling as confirmed by band calculation. Such structure distortion that enhances the extent of inversion-symmetry breaking is primarily responsible for the pairing symmetry evolution. The insight obtained here provides a guideline for searching for noncentrosymmetric superconductors with a large spin-triplet component. |
| 收录类别 | SCI |
| 资助信息 | MEXT [22103004]; JSPS [20244058]; NSFC [10974231, 11174337]; MOST of China [2011CBA00100, 2011CBA00109] |
| 语种 | 英语 |
| 公开日期 | 2013-09-17 |
| 源URL | [http://ir.iphy.ac.cn/handle/311004/33419]  |
| 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 | Harada, S,Zhou, JJ,Yao, YG,et al. Abrupt enhancement of noncentrosymmetry and appearance of a spin-triplet superconducting state in Li-2(Pd1-xPtx)(3)B beyond x=0.8[J]. PHYSICAL REVIEW B,2012,86(22). |
| APA | Harada, S,Zhou, JJ,Yao, YG,Inada, Y,&Zheng, GQ.(2012).Abrupt enhancement of noncentrosymmetry and appearance of a spin-triplet superconducting state in Li-2(Pd1-xPtx)(3)B beyond x=0.8.PHYSICAL REVIEW B,86(22). |
| MLA | Harada, S,et al."Abrupt enhancement of noncentrosymmetry and appearance of a spin-triplet superconducting state in Li-2(Pd1-xPtx)(3)B beyond x=0.8".PHYSICAL REVIEW B 86.22(2012). |
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来源：物理研究所
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