Superconductivity and structural instability of (Hf, Zr)V2and (Hf, Ta)V2alloys at high pressure

Abstract
The superconducting transition temperature and the temperature of the structural instability in (Hf1-xZrx)V2(01-xTax)V2(0c either increases or remains essentially constant under pressure, depending on whether the alloy is HfV2 or ZrV2 rich. A correlation is found between the increase of Tc and the temperature T0 at which the structure becomes unstable.