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A possible family of Ni-based high temperature superconductors
Science Bulletin ( IF 18.9 ) Pub Date : 2018-06-15 , DOI: 10.1016/j.scib.2018.06.005
Congcong Le 1 , Jinfeng Zeng 2 , Yuhao Gu 3 , Guang-Han Cao 4 , Jiangping Hu 5
Affiliation  

We suggest that a family of Ni-based compounds, which contain [Ni2M2O]2− (M = chalcogen) layers with an antiperovskite structure constructed by mixed-anion Ni complexes, NiM4O2, can be potential high temperature superconductors (high-Tc) upon doping or applying pressure. The layer structures have been formed in many other transitional metal compounds such as La2B2Se2O3 (B = Mn, Fe, Co). For the Ni-based compounds, we predict that the parental compounds host collinear antiferromagnetic states similar to those in iron-based high temperature superconductors. The electronic physics near Fermi energy is controlled by two eg d-orbitals with completely independent in-plane kinematics. We predict that the superconductivity in this family is characterized by strong competition between extended s-wave and d-wave pairing symmetries.



中文翻译:

一个可能的镍基高温超导体家族

我们认为,含有 [Ni 2 M 2 O] 2−(M = 硫属元素)层的一族镍基化合物具有由混合阴离子 Ni 络合物 NiM 4 O 2构建的反钙钛矿结构,可能是潜在的高温掺杂或施加压力后的超导体(高温C ) 。层结构已在许多其他过渡金属化合物中形成,例如 La 2 B 2 Se 2 O 3(B = 锰、铁、钴)。对于镍基化合物,我们预测母体化合物具有与铁基高温超导体相似的共线反铁磁态。费米能量附近的电子物理由两个控制电子G 具有完全独立的平面内运动学的d轨道。我们预测该族的超导性以扩展的 s波和d波配对对称性之间的强烈竞争为特征。

更新日期:2018-06-15
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