A bosonic RVB description of doped antiferromagnet

TL;DR

This paper presents a bosonic RVB theoretical framework incorporating phase string effects to explain antiferromagnetic and superconducting transitions, as well as metallic phases, aligning with neutron-scattering data in cuprates.

Contribution

It introduces a novel bosonic RVB model with phase string effects that naturally accounts for multiple phases in doped antiferromagnets.

Findings

Antiferromagnetic and superconducting transitions emerge naturally.

Two metallic regions with distinct features are identified.

The model explains recent neutron-scattering experiments in cuprates.

Abstract

We propose a theory for doped antiferromagnet based on a bosonic resonating-valence-bond (RVB) state with incorporating the phase string effect. Both antiferromagnetic (AF) and superconducting phase transitions occur naturally within such a bosonic RVB phase. Two distinct metallic regions -- underdoping and optimum-doping -- are also found to be a logic consequence, whose unique features explain the recent neutron-scattering measurements in cuprates.