Microscopic model of cuprate superconductivity

Abstract

We present a model for cuprate superconductivity based on the identification of an experimentally detected ''local superconductor'' as a charge 2 fermion pairing in a circular, stationary density wave. This wave acts like a highly correlated local ''boson'' satisfying a modified Cooper problem with additional correlation stabilization relative to the separate right-and left-handed density waves composing it. This local ''boson'' could be formed in a two-bound roton-like manner; it has Fermion statistics. Delocalized superconductive pairing (superconductivity) is achieved by a Feshbach resonance of two unpaired holes (electrons) resonating with a virtual energy level of the bound pair state of the local ''boson'' as described by the previously discussed Boson-Fermion-Gossamer (BFG) model. The spin-charge order interaction offers a microscopic basis for the cuprate T c 's. The spin-charge interaction correlates T c with experimental inelastic neutron and electron Raman scattering is proposed, based on the energy of the virtual bound pair. These and other modifications discussed, suggest a BFG-based microscopic explanation for the entire cuprate superconductivity dome shape.

Magnetic properties of Hf(P, Se)2 single crystal by high-temperature solution method using CdSe flux

“…Replaced by rare earth element in A site of AP2-xXx, the Tc versus substitution y of AP2-xXx was also dome-shaped. From this result, in AP2-xXx, it was clarified that Tc was also tuned by the rare earth substitution of A site in AP2-xXx [4,5], similar as the doping concentration of high Tc superconducting cuprates [6] and ironbased compounds [7].…”

Comparison of various types of coherence and emergent coherent systems

“…The only interactions in a simple electron gas are Coulomb repulsions; superconductivity requires an attraction to create electron pairing but what type of particles can do this? To date a number have been proposed, but it was first suggested by Fröhlich's showed how such an attraction V could arise through an electron–phonon interaction; the theory predicted a mass effect that was soon verified. However, this model was one dimensional and several years passed until second, Leon Cooper found a bound state .…”

“…Today, there are at least 30 laboratories performing fascinating and precise measurements on these systems; an example would be Cornell's observation of the Casimir effect, an effect derived from the zero point motion (ZPM) as the result of the uncertainty principle (“Oscillator Zero Point Motion, Molecular interactions and the Casimir Effect” section). Our interest in coherence has been generated by phase transitions driven by quasiparticles (QPs), be they magnons or a number of other species which may have coherence, so our initial discussion will be to establish fundamental attributes of established coherent systems. We discuss in detail three key concepts that should enable one to more thoroughly appreciate and potentially contribute to the ideas.…”