Field theories of paramagnetic Mott insulators

TL;DR

This paper reviews the derivation of an effective field theory for low-energy spin singlet excitations in paramagnetic Mott insulators with collinear spin correlations, summarizing recent advances in the field.

Contribution

It provides a unified effective field theory framework for understanding low-energy excitations in paramagnetic Mott insulators, building on recent review articles.

Findings

Effective field theory for spin singlet excitations derived

Clarifies the role of collinear spin correlations

Summarizes recent theoretical developments

Abstract

This is a summary of a central argument in recent review articles by the author (cond-mat/0109419, cond-mat/0211005, and cond-mat/0211027). An effective field theory is derived for the low energy spin singlet excitations in a paramagnetic Mott insulator with collinear spin correlations.