A novel mechanism of superconductivity is suggested in materials with variable valence. The pairing of the conduction electrons is caused by their interaction with the virtual excitations of the dynamical short-range order, excitations describing the state of the ion subsystem, which exhibit a dual valence. An evaluation of the coupling constant of the electrons with these excitations λcon and of the transition temperature to the superconducting state Tc showed that λcon ∿ 100, Tc ∿ 100 K.
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Egorushkin, V.E., Murzashev, A.I. Mechanism of superconductivity in metal-oxide compounds. Soviet Physics Journal 30, 1026–1028 (1987). https://doi.org/10.1007/BF00897914
- Transition Temperature
- Conduction Electron
- Superconducting State
- Variable Valence
- Virtual Excitation