The superconducting transition temperature T c for Pb has been determined as a function of hydrostatic pressure up to 26 kbar. T c is found to more closely follow a linear pressure dependence, with ∂T c/∂P = −(3.61 ± 0.05)× 10−5K/bar, than a linear volume dependence, as previously reported. The volume dependence of the electron-phonon parameter λ derived from these measurements, d(ln λ)/d(ln V) = 4.2 ± 0.1, is in good agreement with theoretical calculations by Ott and Sorbello and by Carbotte and Vashishta. The variation of λ for larger volume changes is discussed.
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Clark, M.J., Smith, T.F. Pressure dependence of T c for lead. J Low Temp Phys 32, 495–503 (1978). https://doi.org/10.1007/BF00117966
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DOI: https://doi.org/10.1007/BF00117966