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题名:
Correlation between superconductivity and bond angle of CrAs chain in non-centrosymmetric compounds A(2)Cr(3)As(3) (A = K, Rb)
作者: Wang, Z; Yi, W; Wu, Q; Sidorov, VA; Bao, JK; Tang, ZT; Guo, J; Zhou, YZ; Zhang, S; Li, H; Shi, YG; Wu, XX; Zhang, L; Yang, K; Li, AG; Cao, GH; Hu, JP; Sun, LL; Zhao, ZX
刊名: SCIENTIFIC REPORTS
出版日期: 2016
卷号: 6, 页码:-
DOI: 10.1038/srep37878
通讯作者: Sun, LL (reprint author), Chinese Acad Sci, Inst Phys, Beijing 100190, Peoples R China. ; Sun, LL (reprint author), Chinese Acad Sci, Beijing Natl Lab Condensed Matter Phys, Beijing 100190, Peoples R China. ; Sun, LL (reprint author), Collaborat Innovat Ctr Quantum Matter, Beijing 100190, Peoples R China.
文章类型: 期刊论文
英文摘要: Non-centrosymmetric superconductors, whose crystal structure is absent of inversion symmetry, have recently received special attentions due to the expectation of unconventional pairings and exotic physics associated with such pairings. The newly discovered superconductors A(2)Cr(3)As(3) (A = K, Rb), featured by the quasi-one dimensional structure with conducting CrAs chains, belongs to such kind of superconductor. In this study, we are the first to report the finding that superconductivity of A(2)Cr(3)As(3) (A = K, Rb) has a positive correlation with the extent of non-centrosymmetry. Our in-situ high pressure ac susceptibility and synchrotron x-ray diffraction measurements reveal that the larger bond angle of As-Cr-As (defined as a) in the CrAs chains can be taken as a key factor controlling superconductivity. While the smaller bond angle (defined as beta) and the distance between the CrAs chains also affect the superconductivity due to their structural connections with the alpha angle. We find that the larger value of alpha-beta, which is associated with the extent of the non-centrosymmetry of the lattice structure, is in favor of superconductivity. These results are expected to shed a new light on the underlying mechanism of the superconductivity in these Q1D superconductors and also to provide new perspective in understanding other non-centrosymmetric superconductors.
收录类别: SCI
语种: 英语
WOS记录号: WOS:000388557300001
ISSN号: 2045-2322
Citation statistics:
内容类型: 期刊论文
URI标识: http://ir.sinap.ac.cn/handle/331007/26458
Appears in Collections:中科院上海应用物理研究所2011-2017年_期刊论文

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Recommended Citation:
Wang, Z,Yi, W,Wu, Q,et al. Correlation between superconductivity and bond angle of CrAs chain in non-centrosymmetric compounds A(2)Cr(3)As(3) (A = K, Rb)[J]. SCIENTIFIC REPORTS,2016-01-01,6:-.
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