Effect of hydrostatic compression on tunneling in lead–bismuth superconductor solutions

It has been found that during compression of alloys the coupling between lattice and electrons weakens faster in systems with a larger 2Δ0/Tc ratio in the initial state and with a lower lattice symmetry. The low sensitivity of the superconducting transition temperature Tc to pressure in the case of ϵ -phase solid solutions is here explained by the behavior of their vibration spectra.

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