Maximizing T (c) by tuning nematicity and magnetism in FeSe(1-x) S (x) superconductors.
Maximizing T (c) by tuning nematicity and magnetism in FeSe(1-x) S (x) superconductors.
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通过调节 FeSe1-xSx 超导体的向列性和磁性来最大化 T-c
DOI：
10.1038/s41467-017-01277-x
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发表时间：
2017-10-26
影响因子：
16.6
通讯作者：
Shibauchi T
中科院分区：
文献类型：
--
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
铁基超导电性的一个基本问题是电子向列性和磁性在实现高转变温度（Tc）中的作用。为了解决这个问题，FeSe是一种关键材料，因为它表现出独特的压力相图，包括非磁性的有序相和压力诱导的反铁磁有序相。然而，由于FeSe中的这两个相有相当大的重叠，每个顺序如何影响超导性仍然令人困惑。在这里，我们构建了FeSe 1-xSx的三维电子相图，温度（T）对压力（P）和等价S取代（x）。通过同时调整化学和物理压力，对硫族元素的高度显示出对比的变化，我们实现了一个完整的分离的反铁磁相和反铁磁相。在这两者之间，出现了一个扩展的非磁性的四相，其中Tc显示出显着的增强。完成的相图揭示，高Tc超导性位于附近的圆顶形反铁磁相的两端，而Tc保持低附近的超导临界点。不同相之间的重叠阻碍了对FeSe中每个相如何影响超导电性的理解。在这里，Matsuura等人实现了FeSe 1-xSx的非磁性铁磁相和反铁磁相的完全分离，观察到之间的四铁磁相具有显著增强的Tc。
A fundamental issue concerning iron-based superconductivity is the roles of electronic nematicity and magnetism in realising high transition temperature (T c). To address this issue, FeSe is a key material, as it exhibits a unique pressure phase diagram involving non-magnetic nematic and pressure-induced antiferromagnetic ordered phases. However, as these two phases in FeSe have considerable overlap, how each order affects superconductivity remains perplexing. Here we construct the three-dimensional electronic phase diagram, temperature (T) against pressure (P) and isovalent S-substitution (x), for FeSe1−xSx. By simultaneously tuning chemical and physical pressures, against which the chalcogen height shows a contrasting variation, we achieve a complete separation of nematic and antiferromagnetic phases. In between, an extended non-magnetic tetragonal phase emerges, where T c shows a striking enhancement. The completed phase diagram uncovers that high-T c superconductivity lies near both ends of the dome-shaped antiferromagnetic phase, whereas T c remains low near the nematic critical point. The overlap between different phases has hindered the understanding of how each phase affects superconductivity in FeSe. Here, Matsuura et al. achieve a complete separation of non-magnetic nematic and antiferromagnetic phases for FeSe1-xSx, observing a tetragonal phase in between with a strikingly enhanced T c.
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FeSe 中穹顶形磁序与高压下的高温超导性竞争
影响因子：
16.6
作者：
Sun JP;Matsuura K;Ye GZ;Mizukami Y;Shimozawa M;Matsubayashi K;Yamashita M;Watashige T;Kasahara S;Matsuda Y;Yan JQ;Sales BC;Uwatoko Y;Cheng JG;Shibauchi T
通讯作者：
Shibauchi T
影响因子：
2.1
作者：
Millican, Jasmine N.;Phelan, Daniel;Carpenter, Elisabeth
通讯作者：
Carpenter, Elisabeth
影响因子：
8.6
作者：
Moon, Chang-Youn;Choi, Hyoung Joon
通讯作者：
Choi, Hyoung Joon
影响因子：
8.6
作者：
Bendele, M.;Amato, A.;Khasanov, R.
通讯作者：
Khasanov, R.
影响因子：
8.6
作者：
Kontani, Hiroshi;Onari, Seiichiro
通讯作者：
Onari, Seiichiro