1202.2480 (Dale R. Harshman et al.)

Theory of High-Tc Superconductivity: Accurate Predictions of Tc    [PDF]

Dale R. Harshman, Anthony T. Fiory

The superconducting transition temperatures of high-Tc compounds based on
copper, iron, ruthenium and certain organic molecules are discovered to be
dependent on bond lengths, ionic valences, and Coulomb coupling between
electronic bands in adjacent, spatially separated layers.[1] Optimal transition
temperature, denoted as Tc0, is given by the universal expression kBTc0 = e^2
{\beta} / \ell{\zeta}; \ell is the spacing between interacting charges within
the layers, {\zeta} is the distance between interacting layers and {\beta} is a
universal constant, equal to about twice the reduced electron Compton
wavelength (suggesting that Compton scattering plays a role in pairing).
Non-optimum compounds in which sample degradation is evident typically exhibit
Tc < Tc0. For the 31+ optimum compounds tested, the theoretical and
experimental Tc0 agree statistically to within +/- 1.4 K. The elemental high Tc
building block comprises two adjacent and spatially separated charge layers;
the factor e^2 \ell{\zeta} arises from Coulomb forces between them. The
theoretical charge structure representing a room-temperature superconductor is
also presented.
[1] DOI: 10.1088/0953-8984/23/29/295701

View original: http://arxiv.org/abs/1202.2480