Electronic Structure of Novel Non-centrosymmetric Superconductor Mg2Rh3P
Electronic Structure of Novel Non-centrosymmetric Superconductor Mg2Rh3P
复制标题
新型非中心对称超导体Mg2Rh3P的电子结构
DOI：
10.1088/1742-6596/1293/1/012028
复制
发表时间：
2019
期刊：
影响因子：
--
通讯作者：
K. Kawashima
中科院分区：
文献类型：
--
作者：
I. Hase;T. Yanagisawa;A. Iyo;H. Fujihisa;Y. Goto;H. Eisaki;K. Kawashima
用第一性原理计算了一种新型非中心对称超导体Mg2-xRh3P的电子结构。化学计量比的Mg2Rh3P在费米能级上显示出一个假能隙。这与化学计量比样品Mg2Rh3P不表现出超导电性而缺镁样品表现出超导电性(T c∼为3.6K)的实验事实是一致的.由于反对称的自旋轨道耦合，Mg2Rh3P的能带色散表现出特征的能带分裂.Mg2Rh3P的ASOC的大小与Li2Pd3B相当。我们还表明，它的5d对应的Mg2Ir3P可能有相当大的ASOC，同样Li2Pd3B也是奇偶混合超导体的一个很好的候选者。
We calculated the electronic structure of a novel non-centrosymmetric superconductor Mg 2-x Rh 3 P from first-principles. Stoichiometric Mg 2 Rh 3 P shows a pseudogap at the Fermi level. This is consistent with the experimental fact that the stoichiometric sample Mg 2 Rh 3 P does not show superconductivity and the Mg-deficient sample Mg 19 Rh 3 P shows superconductivity with T c∼ 3.6 K. The band dispersion of Mg 2 Rh 3 P shows a characteristic band splitting due to the anti-symmetric spin-orbit coupling (ASOC). The magnitude of ASOC of Mg 2 Rh 3 P is comparable to Li 2 Pd 3 B. We also show that its 5d-counterpart Mg 2 Ir 3 P may have quite a large ASOC, and is a good candidate of parity-mixed superconductor likewise Li 2 Pd 3 B.