Stripe-Like Inhomogeneities, Spectroscopies, Pairing, and Coherence in the High-Tc Cuprates

TL;DR

This paper proposes a model where high-Tc cuprates have inhomogeneous stripe-like regions with carriers called stripons, quasi-electrons, and svivons, explaining their spectroscopic properties, pairing mechanism, and phase diagram.

Contribution

It introduces a novel inhomogeneous carrier model involving stripons, quasi-electrons, and svivons, linking stripe inhomogeneities to superconductivity in cuprates.

Findings

Carriers are polaron-like stripons, quasi-electrons, and svivons.

Stripe inhomogeneities result from svivon Bose condensation.

Pairing involves transitions between stripons and quasi-electrons via svivon exchange.

Abstract

It is found that the carriers of the high-T_c cuprates are polaron-like "stripons" carrying charge and located in stripe-like inhomogeneities, "quasi-electrons" carrying charge and spin, and "svivons" carrying spin and lattice distortion. This is shown to result in the observed anomalous spectroscopic properties of the cuprates. The AF/stripe-like inhomogeneities result from the Bose condensation of the svivon field, and the speed of their dynamics is determined by the width of the double-svivon neutron-resonance peak. Pairing results from transitions between pair states of stripons and quasi-electrons through the exchange of svivons. The obtained pairing symmetry is of the d_{x^2-y^2} type; however, sign reversal through the charged stripes results in features not characteristic of this symmetry. The phase diagram is determined by a pairing and a coherence line, associated with a Mott transition, and the pseudogap state corresponds to incoherent pairing.