Abstract
On the basis of the relationship between the London penetration depth and the wavelength of plasma oscillations, the analogy of plasmons in a metal, the plasmon mechanism of superconductivity has been considered. Expressions are obtained for the velocity of a Cooper pair and an estimate for the critical temperature depending on the London penetration depth and coherence length. The theoretical values of the critical temperatures were checked for compliance with the experimental values for many unconventional superconductors. There is a good agreement for many cuprate, organic superconductors. Possible values of coherence length and London penetration depth for a room-temperature superconductor are obtained.
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