Local orthorhombic lattice distortions in the paramagnetic tetragonal phase of superconducting NaFe(1-x)Ni(x)As.
Local orthorhombic lattice distortions in the paramagnetic tetragonal phase of superconducting NaFe(1-x)Ni(x)As.
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超导 NaFe1-xNixAs 顺磁四方相中的局部正交晶格畸变
DOI：
10.1038/s41467-018-05529-2
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发表时间：
2018-08-07
影响因子：
16.6
通讯作者：
Dai P
中科院分区：
文献类型：
--
作者：
Wang W;Song Y;Cao C;Tseng KF;Keller T;Li Y;Harriger LW;Tian W;Chi S;Yu R;Nevidomskyy AH;Dai P
Understanding the interplay between nematicity, magnetism and superconductivity is pivotal for elucidating the physics of iron-based superconductors. Here we use neutron scattering to probe magnetic and nematic orders throughout the phase diagram of NaFe1−xNixAs, finding that while both static antiferromagnetic and nematic orders compete with superconductivity, the onset temperatures for these two orders remain well separated approaching the putative quantum critical points. We uncover local orthorhombic distortions that persist well above the tetragonal-to-orthorhombic structural transition temperature Ts in underdoped samples and extend well into the overdoped regime that exhibits neither magnetic nor structural phase transitions. These unexpected local orthorhombic distortions display Curie–Weiss temperature dependence and become suppressed below the superconducting transition temperature Tc, suggesting that they result from the large nematic susceptibility near optimal superconductivity. Our results account for observations of rotational symmetry breaking above Ts, and attest to the presence of significant nematic fluctuations near optimal superconductivity. The interplay between nematic, antiferromagnetic order and superconductivity in the iron pnictide superconductors remains obscured. Here, Wang et al. demonstrate well-separated nematic and Neel transition temperatures near optimal superconductivity in NaFe1−xNixAs and uncover local distortions which could account for rotational symmetry breaking common in iron pnictides.
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影响因子：
8.6
作者：
Christianson, A. D.;Lumsden, M. D.;Mandrus, D.
通讯作者：
Mandrus, D.
DOI：
10.1073/pnas.1620651114
发表时间：
2017-05-09
影响因子：
11.1
作者：
Lederer, Samuel;Schattner, Yoni;Kivelson, Steven A.
通讯作者：
Kivelson, Steven A.
BaFe2(As1−xPx)2 接近最佳超导性的结构和磁相变
影响因子：
8.6
作者：
Hu, Ding;Lu, Xingye;Dai, Pengcheng
通讯作者：
Dai, Pengcheng
影响因子：
3.7
作者：
Li, Shiliang;de la Cruz, Clarina;Dai, Pengcheng
通讯作者：
Dai, Pengcheng
影响因子：
44.1
作者：
Dai, Pengcheng
通讯作者：
Dai, Pengcheng