The Mixed Spin S=(1/2,1) XXZ Ferrimagnet at Zero Temperature

TL;DR

This paper uses linked cluster series expansions to analyze the ground state properties of mixed spin S=(1/2,1) quantum ferrimagnets across different dimensions, providing insights into their energy, magnetization, and spectra.

Contribution

It introduces a novel application of linked cluster series expansions to study mixed spin ferrimagnets at zero temperature, comparing results with spin wave theory.

Findings

Excellent agreement between series expansions and spin wave theory

Ground state energy and magnetization are characterized across dimensions

Excitation spectra are detailed for the studied ferrimagnets

Abstract

Linked cluster series expansions about the Ising limit are used to study ground state preperties, viz. ground state energy, magnetization and excitation spectra, for mixed spin S=(1/2,1) quantum ferrimagnets on simple bipartite lattices in 1, 2, and 3-dimensions. Results are compared to second-order spin wave theory and, in general, excellent agreement is obtained.