Electronic Structure of Novel Non-centrosymmetric Superconductor Mg2Rh3P. (September 2019)

• Record Type: Journal Article
• Authors: Hase, I; Yanagisawa, T; Iyo, A; Fujihisa, H; Goto, Y; Eisaki, H; Kawashima, K
• Is Part Of: Journal of physics. Volume 1293(2019)
• Publication Date: 2019-09
• Subjects: Physics -- Congresses; 530.5
• DOI: 10.1088/1742-6596/1293/1/012028
• Languages: English
• ISSNs: 1742-6588

Abstract

Abstract: We calculated the electronic structure of a novel non-centrosymmetric superconductor Mg2-x Rh3 P from first-principles. Stoichiometric Mg2 Rh3 P shows a pseudogap at the Fermi level. This is consistent with the experimental fact that the stoichiometric sample Mg2 Rh3 P does not show superconductivity and the Mg-deficient sample Mg19 Rh3 P shows superconductivity with T c ∼ 3.6 K. The band dispersion of Mg2 Rh3 P shows a characteristic band splitting due to the anti-symmetric spin-orbit coupling (ASOC). The magnitude of ASOC of Mg2 Rh3 P is comparable to Li2 Pd3 B. We also show that its 5d-counterpart Mg2 Ir3 P may have quite a large ASOC, and is a good candidate of parity-mixed superconductor likewise Li2 Pd3 B.