Charge and spin inhomogeneity as a key to the physics of the high Tc cuprates

TL;DR

This paper proposes that charge and spin inhomogeneities, particularly the stripe phase, are central to understanding the complex behaviors of high-temperature cuprate superconductors across different doping levels.

Contribution

It introduces a unified scenario based on charge-driven inhomogeneity and spin fluctuations, explaining diverse phenomena in cuprates.

Findings

Spin and charge fluctuations influence quasiparticle interactions.

The model accounts for behaviors across doping regimes.

Critical fluctuations relate to the stripe instability.

Abstract

We present a coherent scenario for the physics of cuprate superconductors, which is based on a charge-driven inhomogeneity, i.e. the ``stripe phase''. We show that spin and charge critical fluctuations near the stripe instability of strongly correlated electron systems provide an effective interaction between the quasiparticles, which is strongly momentum, frequency, temperature and doping dependent. This accounts for the various phenomena occurring in the overdoped, optimally and underdoped regimes both for the normal and the superconductive phase.