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Pressure-induced superconductivity domes described with a theoretical equation based on the free volume concept
115905 Tanberry Dr, Chino Hills, CA 91709, USA.
Abstract:
A generic conductivity equation developed in our previous work is borrowed to explore how superconductivity transition temperature changes with external high pressure. The volume-pressure relationship revealed in the literature is utilized to estimate the pressure-dependent free volume based on our free volume equation. Pressure-induced single and double superconductivity domes are predicted with the obtained equation. It is also used to fit experimental data available in the literature. A good agreement with experimental observations is obtained. Our equation can fit nonlinear and polynomial relationships as well. The findings provide a theoretical foundation for pressure-induced phenomena among many superconductors.
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