Magnetic excitations in the one-dimensional Heisenberg-Ising model with external fields and their experimental realizations

TL;DR

This paper reviews the theoretical and experimental progress on magnetic excitations in the 1D Heisenberg-Ising model, emphasizing its realization in Co-based materials and the emergent physics in these quantum systems.

Contribution

It provides a detailed pedagogical framework for deriving the low-energy Hamiltonian and summarizes recent experimental realizations of magnetic excitations in the model.

Findings

Derivation of the low-energy effective Hamiltonian for Co-based materials.

Identification of novel magnetic excitations and emergent physics.

Summary of recent experimental observations in quasi-1D antiferromagnetic materials.

Abstract

The one dimensional (1D) spin-1/2 Heisenberg-Ising model, a prototype quantum many-body system, has been intensively studied for many years. In this review, after a short introduction on some basic concepts of group theory for the octahedral group, a detailed pedagogical framework is laid down to derive the low-energy effective Hamiltonian for the Co-based materials. The 1D spin-1/2 Heisenberg-Ising model is obtained when applying the analysis to quasi-1D antiferromagnetic materials $\rm BaCo_2V_2O_8$ and $\rm SrCo_2V_2O_8$. After the preparation, we review the theoretical progresses of a variety of novel magnetic excitations and emergent physics in the 1D spin-1/2 Heisenberg-Ising model, and further summarize their recent experimental realizations.