Two distinct superconducting pairing states divided by the nematic end point in FeSe(1-x) S (x).
Two distinct superconducting pairing states divided by the nematic end point in FeSe(1-x) S (x).
复制标题
DOI：
10.1126/sciadv.aar6419
复制
发表时间：
2018-05
期刊：
影响因子：
13.6
通讯作者：
Matsuda Y
中科院分区：
文献类型：
--
作者：
Hanaguri T;Iwaya K;Kohsaka Y;Machida T;Watashige T;Kasahara S;Shibauchi T;Matsuda Y
扫描隧道显微镜揭示了铁基超导体向列性与超导电性的关系。非常规超导性经常与其他电子序竞争或共存。在铁基超导体中，一个中心问题是超导性和电子向列性，晶格旋转对称性的自发破缺之间的关系。使用光谱成像扫描隧道显微镜，我们同时研究了FeSe 1 −xSx的电子结构和超导能隙，其中向列性在x = 0.17的超导终点（NEP）以上减小。能带结构表现为各向异性的准粒子干涉图案，随着x的增加逐渐变得各向同性，在NEP处没有异常。相比之下，超导带隙，这是完整的在超导相，不连续收缩以上的NEP。这意味着向列性的存在或不存在导致两种不同的配对状态，而配对相互作用对向列性的强度不敏感。
Scanning tunneling microscopy reveals the relationship between nematicity and superconductivity in an iron-based superconductor. Unconventional superconductivity often competes or coexists with other electronic orders. In iron-based superconductors, a central issue has been the relationship between superconductivity and electronic nematicity, spontaneous breaking of the lattice rotational symmetry. Using spectroscopic-imaging scanning tunneling microscopy, we simultaneously investigated the electronic structure and the superconducting gap in FeSe1−xSx, where the nematicity diminishes above the nematic end point (NEP) at x = 0.17. The nematic band structure appears as anisotropic quasiparticle-interference patterns that gradually become isotropic with increasing x without anomalies at the NEP. By contrast, the superconducting gap, which is intact in the nematic phase, discontinuously shrinks above the NEP. This implies that the presence or absence of nematicity results in two distinct pairing states, whereas the pairing interaction is insensitive to the strength of nematicity.
登录
查看更多内容
通过调节 FeSe1-xSx 超导体的向列性和磁性来最大化 T-c
影响因子：
16.6
作者：
Matsuura K;Mizukami Y;Arai Y;Sugimura Y;Maejima N;Machida A;Watanuki T;Fukuda T;Yajima T;Hiroi Z;Yip KY;Chan YC;Niu Q;Hosoi S;Ishida K;Mukasa K;Kasahara S;Cheng JG;Goh SK;Matsuda Y;Uwatoko Y;Shibauchi T
通讯作者：
Shibauchi T
影响因子：
8.6
作者：
Kontani, Hiroshi;Onari, Seiichiro
通讯作者：
Onari, Seiichiro
影响因子：
3.7
作者：
Boehmer, A. E.;Hardy, F.;Meingast, C.
通讯作者：
Meingast, C.
影响因子：
56.9
作者：
Kohsaka, Y.;Taylor, C.;Davis, J. C.
通讯作者：
Davis, J. C.
影响因子：
8.6
作者：
Nakayama, K.;Miyata, Y.;Takahashi, T.
通讯作者：
Takahashi, T.