Bose-Einstein Condensation of Cooper-Pairs in the Conventional Superconductors

Observed crossover events between different power functions of absolute temperature occurring below about ~1 K in the dependence heat capacity or thermal conductivity conventional superconductors are identified as transitions from Maxwell-Boltzmann to Bose-Einstein (BE) statistics Cooper-pairs. Because low mass Cooper pairs 2me (with me electron) and their high density, BE-condensation temperature, TBE, Cooper-pairs is five orders magnitude higher than for dilute alkali atom condensates. The condensation TBE turns out be proportional superconducting transition TSC. From observed TBE-values it possible calculate density pairs. Assuming that form a dense gas bosons, diameter Cooper-pair orbitals equal London penetration depth. As conclusion, due large orbital diamagnetism pairs, only one layer Cooper-pairs, next inner surface sample, sufficient shield an applied external magnetic field completely.