Dynamics of anisotropic spin dimer system in strong magnetic field

TL;DR

This paper models the behavior of an anisotropic spin dimer system in strong magnetic fields, successfully matching experimental ESR spectra of TlCuCl3 using an effective field theory approach.

Contribution

It introduces an effective field theory that accurately describes high-field ESR spectra of TlCuCl3, considering weak anisotropy in exchange interactions.

Findings

Good agreement between theory and experiment across various geometries.

Effective field theory captures the dynamics of anisotropic spin dimers.

Modeling extends understanding of magnetic excitations in TlCuCl3.

Abstract

Recently measured high-field ESR spectra of the spin dimer material TlCuCl3 are described within the framework of an effective field theory. A good agreement between the theory and experiment is achieved, for all geometries and in a wide field range, under the assumption of a weak anisotropy of the interdimer as well as intradimer exchange interaction.