Superconducting and Antiferromagnetic Properties of Dual-Phase V$_3$Ga
Michelle E. Jamer, Brandon Wilfong, Vasiliy D. Buchelnikov, Vladimir, V. Sokolovskiy, Olga N. Miroshkina, Mikhail A. Zagrebin, Danil R. Baigutlin,, Jared Naphy, Badih A. Assaf, Laura H. Lewis, Aki Pulkkinen, Bernardo A., Barbiellini, Arun Bansil, and Don Heiman
TL;DR
This study investigates the dual-phase V$_3$Ga compound, revealing its near-degenerate superconducting and antiferromagnetic phases, with potential applications in quantum technology devices.
Contribution
It demonstrates the coexistence of superconductivity and antiferromagnetism in V$_3$Ga and highlights the near-degeneracy of its phases through theoretical and experimental analysis.
Findings
V$_3$Ga exhibits superconductivity below 14 K.
The two phases are energetically nearly degenerate (~10 meV/atom).
V$_3$Ga can potentially be used in quantum devices combining superconductivity and antiferromagnetism.
Abstract
The binary compound VGa can exhibit two near-equilibrium phases, consisting of the A15 structure that is superconducting, and the Heusler D0 structure that is semiconducting and antiferromagnetic. Density functional theory calculations show that the two phases are closely degenerate, being separated by only ~10 meV/atom. Magnetization measurements on bulk-grown samples show superconducting behavior below 14 K. These results indicate the possibility of using VGa for quantum technology devices utilizing both superconductivity and antiferromagnetism at the same temperature.
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