TITLE:
Voids in the Hall Effect; Excitons in HiTc
AUTHORS:
Antony J. Bourdillon
KEYWORDS:
High Temperature Superconductors, Hall Effect, Exciton, Holes, Energy Bands, Dispersive Dynamics, Dispersive Second Derivative, Negative Mass, Antiparticle Dynamics
JOURNAL NAME:
Journal of Modern Physics,
Vol.8 No.4,
March
15,
2017
ABSTRACT: The outstanding difference between high temperature superconductors and low temperature superconductors is the sign of the Hall coefficient, properly understood. Since the Lorentz force acts on particles, not voids nor immobile ions, we propose that the experimental positive coefficient is due to dispersion dynamics in valence bands, i.e. on electrons with positive charge/mass ratio, but with negative charge and negative effective mass. In HiT ccompounds, anionic and cationic doping creates holes that substitute for the lattice distortions that bind Cooper pairs in metallic superconductors such as Nb. In both types of superconductor, the conventional notion of antiparallel spins S = 0, with paired wave vectors k and -k, is maintained; but in the ceramics “holes” h, produced by chemical doping and measured in the normal state, are available to bond super-conducting Boson pairs via h− or h02excitons.