Superconductivity induced by Mg deficiency in non-centrosymmetric phosphide Mg2Rh3P
Abstract
The search for non-centrosymmetric superconductors that may exhibit unusual physical properties and unconventional superconductivity has yielded the synthesis of a non-centrosymmetric phosphide Mg2Rh3P with an Al2Mo3C-type structure. Although stoichiometric Mg2Rh3P does not exhibit superconductivity at temperatures above 2 K, we found that an Mg deficiency of approximately 5 at.% in the Mg2Rh3P induced superconductivity at 3.9 K. Physical properties such as the lattice parameter a = 0.70881 nm, Sommerfeld constant γn = 5.36 mJ mol-1 K-2, specific heat jump el/γnTc = 0.72, electron-phonon coupling constant λe-p = 0.58, upper critical field Hc2(0) = 24.3 kOe, and pressure effect dTc/dP = -0.34 K/GPa were measured for the superconducting Mg2-δRh3P (δ 0.1). Band-structure calculations indicate that exotic fermions, which are not present in high-energy physics, exist in Mg2Rh3P. Since Mg, Rh, and P are the first elements used at each crystal site of Al2Mo3C-type compounds, the discovery of Mg2Rh3P may guide the search for new related materials.
Turn this paper into a full lesson
ArcXiv compiles a staged curriculum from this paper: 8-12 lessons across beginner → advanced, synthesised section guides, visuals, flashcards, a quiz, exercises, and on-demand deep dives per section. Grounded in the abstract, never invented.