Stripes, Carriers, and High Tc in the Cuprates

TL;DR

This paper proposes a striped electronic structure with three types of carriers in high-Tc cuprates, explaining their anomalous properties and the mechanism of high-temperature superconductivity.

Contribution

It introduces a novel model involving stripons, quasielectrons, and svivons, linking electronic structure to superconductivity and pseudogap phenomena in cuprates.

Findings

Identification of three carrier types: stripons, quasielectrons, svivons.

Explanation of resistivity, Hall constant, and thermoelectric power behaviors.

Description of pairing mechanism involving transitions between quasielectrons and stripons.

Abstract

Considering both "large-U" and "small-U" orbitals it is found that the high-Tc cuprates are characterized by a striped structure, and three types of carriers: polaron-like "stripons" carrying charge, "quasielectrons" carrying charge and spin, and "svivons" carrying spin and lattice distortion. It is shown that this electronic structure leads to the anomalous physical properties of the cuprates, and specifically the systematic behavior of the resistivity, Hall constant, and thermoelectric power. High-Tc pairing results from transitions between pair states of quasielectrons and stripons through the exchange of svivons. A pseudogap phase occurs when pairing takes place above the temperature where stripons become coherent, and this temperature determines the Uemura limit.