Superconducting and antiferromagnetic properties of dual-phase V_3Ga

摘要

The binary compound V_3Ga can exhibit two near-equilibrium phases, the A15 structure that is superconducting and the Heusler D0_3 structure that is semiconducting and antiferromagnetic. Density functional theory calculations show that these two phases are nearly degenerate, being separated in energy by only ±10meV/atom. Our magnetization measurements on bulk-grown samples show antiferromagnetism and superconducting behavior below 14 K. These results indicate the possibility of using V_3Ga for quantum technology devices exploiting the coexistence of superconductivity and antiferromagnetism in a dual-phase material.