Superconducting and antiferromagnetic properties of dual-phase V3Ga

• Published in: Applied physics letters Vol. 117; no. 6
• Main Authors: Jamer, Michelle E., Wilfong, Brandon, Buchelnikov, Vasiliy D., Sokolovskiy, Vladimir V., Miroshkina, Olga N., Zagrebin, Mikhail A., Baigutlin, Danil R., Naphy, Jared, Assaf, Badih A., Lewis, Laura H., Pulkkinen, Aki, Barbiellini, Bernardo, Bansil, Arun, Heiman, Don
• Format: Journal Article
• Language: English
• Published: Melville American Institute of Physics 10-08-2020; American Institute of Physics (AIP)
• Subjects: A15 compounds; Antiferromagnetism; Applied physics; CONDENSED MATTER PHYSICS, SUPERCONDUCTIVITY AND SUPERFLUIDITY; Crystal lattices; Density functional theory; Flux pinning; Magnetism; Superconductivity
• ISSN: 0003-6951; 1077-3118
• DOI: 10.1063/5.0015535

The binary compound V3Ga can exhibit two near-equilibrium phases, the A15 structure that is superconducting and the Heusler D03 structure that is semiconducting and antiferromagnetic. Density functional theory calculations show that these two phases are nearly degenerate, being separated in energy by only ±10 meV/atom. Our magnetization measurements on bulk-grown samples show antiferromagnetism and superconducting behavior below 14 K. These results indicate the possibility of using V3Ga for quantum technology devices exploiting the co-existence of superconductivity and antiferromagnetism in a dual-phase material.