Superatom Representation of High-TC Superconductivity Revisited

TL;DR

This paper introduces a super-atom model to better understand high-temperature superconductivity, linking electronic entanglement, local states, and magnon interactions to explain the emergence of Cooper pairs and their condensation.

Contribution

It proposes a novel super-atom conceptual framework and a Hückel RVB formalism to describe high-TC superconductivity mechanisms and the role of electron correlations.

Findings

Super-atom states couple with magnons to form Cooper pairs.

The model relates Tc to super-exchange interactions and Neél temperature.

Robustness of HTSC linked to maximizing electron correlation entropy.

Abstract

A "super-atom" conceptual interface between chemistry and physics is proposed in order to assist in the search for higher TC superconductors. High-TC superconductivity HTSC is articulated as the entanglement of two disjoint electronic manifolds in the vicinity of a common Fermi energy. The resulting HTSC ground state couples near-degenerate protected local "super-atom" states to virtual magnons in an antiferromagnetic AFM embedding. The composite Cooper pairs emerge as the interaction particles for virtual magnons mediated "self-coherent entanglement" of super-atom states. A H\"uckel type resonating valence bond RVB formalism is employed in order to illustrate the real-space Cooper pairs as well as their delocalization and Bose Einstein condensation BEC on a ring of super-atoms. The chemical potential \mu(BEC) for Cooper pairs joining the condensate is formulated in terms of the super-exchange interaction, and consequently the TC in terms of the Ne\'el temperature. A rationale for the robustness of the HTSC ground state is proposed: achieving local maximum "electron correlation entropy" at the expense of non-local phase rigidity.