Theory of High Temperature Superconductivity (Fundamental by S. Fujita,S. Godoy PDF

By S. Fujita,S. Godoy

Flux quantization experiments point out that the vendors, Cooper pairs (pairons), within the supercurrent have cost value 2e, and they circulation independently. Josephson interference in a Superconducting Quantum Int- ference gadget (SQUID) exhibits that the facilities of plenty (CM) of pairons circulation as bosons with a linear dispersion relation. in accordance with this proof we increase a conception of superconductivity in traditional and mate- als from a unified viewpoint. Following Bardeen, Cooper and Schrieffer (BCS) we regard the phonon trade charm because the explanation for superc- ductivity. For cuprate superconductors, even if, we take account of either optical- and acoustic-phonon trade. BCS all started with a Hamiltonian containing “electron” and “hole” kinetic energies and a pairing interplay with the phonon variables eradicated. those “electrons” and “holes” have been brought officially by way of a free-electron version, which we think of unsatisfactory. We outline “electrons” and “holes” by way of the cur- tures of the Fermi floor. “Electrons” (1) and “holes” (2) are diversified they usually are assigned with diverse powerful lots: Blatt, Schafroth and Butler proposed to provide an explanation for superconductivity when it comes to a Bose-Einstein Condensation (BEC) of electron pairs, each one having mass M and a measurement. The approach of unfastened monstrous bosons, having a quadratic dispersion relation: and relocating in 3 dimensions (3D) undergoes a BEC transition at the place is the pair density.

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Flux quantization experiments point out that the vendors, Cooper pairs (pairons), within the supercurrent have cost value 2e, and they circulate independently. Josephson interference in a Superconducting Quantum Int- ference machine (SQUID) indicates that the facilities of lots (CM) of pairons circulation as bosons with a linear dispersion relation.

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