Are AuPdTM (T = Sc, Y and M = Al, Ga, In), Heusler Compounds Superconductors without Inversion Symmetry?
Max Planck Institute for Chemical Physics of Solids, 01187 Dresden, Germany
Johannes Gutenberg—Universität, Institut für Analytische Chemie und Anorganische Chemie, 55122 Mainz, Germany
Author to whom correspondence should be addressed.
Received: 22 July 2019 / Revised: 6 August 2019 / Accepted: 7 August 2019 / Published: 13 August 2019
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Heusler compounds with 2:1:1 stoichiometry either have a centrosymmetric Cu
MnAl structure or an Li
AgSb structure without a centre of inversion. The centrosymmetry is always lost in quaternary Heusler compounds with 1:1:1:1 stoichiometry and LiMgPdSn structure. This presents the possibility of realizing non-centrosymmetric superconductors in the family of Heusler compounds. The objective of this study is to search for and investigate such quaternary derivatives of Heusler compounds, particularly with respect to superconductivity. Several compounds were identified by carrying out calculations from first principles and superconductivity was observed in experiments conducted on AuPdScAl and AuPtScIn at the critical temperatures of 3.0 and 0.96 K, respectively. All investigated compounds had a valence electron count of 27, which is also the case in centrosymmetric Heusler superconductors.
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Kautzsch, L.; Mende, F.; Fecher, G.H.; Winterlik, J.; Felser, C. Are AuPdTM (T = Sc, Y and M = Al, Ga, In), Heusler Compounds Superconductors without Inversion Symmetry? Materials 2019, 12, 2580.
Kautzsch L, Mende F, Fecher GH, Winterlik J, Felser C. Are AuPdTM (T = Sc, Y and M = Al, Ga, In), Heusler Compounds Superconductors without Inversion Symmetry? Materials. 2019; 12(16):2580.
Kautzsch, Linus; Mende, Felix; Fecher, Gerhard H.; Winterlik, Jürgen; Felser, Claudia. 2019. "Are AuPdTM (T = Sc, Y and M = Al, Ga, In), Heusler Compounds Superconductors without Inversion Symmetry?" Materials 12, no. 16: 2580.
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