Charge order, superconductivity, and a global phase diagram of doped antiferromagnets

TL;DR

This paper explores the complex relationship between charge order, superconductivity, and phase transitions in doped antiferromagnets, proposing a comprehensive phase diagram relevant to cuprate superconductors.

Contribution

It introduces a theoretical framework for understanding the interplay of lattice symmetry breaking and superconductivity in doped antiferromagnets with Coulomb interactions.

Findings

Identification of quantum phase transitions between different phases.

Description of evolution of fermion excitation spectrum.

Implications for experimental observations in cuprate superconductors.

Abstract

We investigate the interplay between lattice-symmetry breaking and superconducting order in a two-dimensional model of doped antiferromagnets, with long-range Coulomb interactions and Sp(2N) spin symmetry, in the large-N limit. Our results motivate the outline of a global phase diagram for the cuprate superconductors. We describe the quantum transitions between the phases, the evolution of their fermion excitation spectrum, and the experimental implications.