Thermodynamics of an integrable model for electrons with correlated hopping

TL;DR

This paper introduces an exactly solvable supersymmetric model for electrons with correlated hopping and Hubbard interaction, analyzing its phase diagram, ground state, excitations, and critical behavior using Bethe Ansatz and conformal field theory.

Contribution

It presents a new integrable model for correlated electrons and provides a detailed analysis of its phase diagram and critical properties.

Findings

Identified phase transitions as a function of interaction and density.

Determined critical exponents for correlation functions.

Solved the model exactly using Bethe Ansatz.

Abstract

A new supersymmetric model for electrons with generalized hopping terms and Hubbard interaction on a one-dimensional lattice is solved by means of the Bethe Ansatz. We investigate the phase diagram of this model by studying the ground state and excitations of the model as a function of the interaction parameter, electronic density and magnetization. Using arguments from conformal field theory we can study the critical exponents describing the asymptotic behaviour of correlation functions at long distances.