High-Temperature Superconductivity Mechanism for Cuprates

TL;DR

This paper proposes a new mechanism for high-temperature superconductivity in cuprates, involving preformed pairs as soft bosons that dissociate above a critical temperature, explaining experimental observations and the Uemura-Homes law.

Contribution

It introduces a novel superconducting mechanism based on preformed pairs as soft bosons, providing a physical basis for experimental phenomena and the Uemura-Homes law.

Findings

Preformed pairs dissociate above the BKT transition temperature.

Formation of two circular charge density waves upon dissociation.

Explanation of the Uemura-Homes law within the proposed model.

Abstract

Egorov and March plotted the product of resistivity and the copper spin-lattice relaxation time vs. temperature for yttrium barium copper oxide finding a minimum at temperature T greater than the superconducting temperature, heralding an electronic phase change which can be interpreted as the formation of a "preformed" pair. In this context we propose a superconducting mechanism based on the notion that the preformed pair is a "soft" boson (a localized, different type of Cooper pair) which dissociates above the classical BKT transition temperature, resulting in two circular charge density waves. The model suggests explanations for considerable experimental work and offers a physical explanation for the basis of the Uemura-Homes law.