Department of Physics Papers

Document Type

Journal Article

Date of this Version

7-11-2013

Publication Source

Physical Review B

Volume

88

Start Page

014411-1

Last Page

014411-18

DOI

10.1103/PhysRevB.88.014411

Abstract

We treat the ground state, elementary excitations, and neutron scattering cross section for a system of trimers consisting of three tightly bound spins 1/2 on a distorted kagome lattice, subject to isotropic nearest-neighbor (usually antiferromagnetic) Heisenberg interactions. The interactions between trimers are assumed to be weak compared to the intratrimer interactions. We compare the spin-wave excitation spectrum of trimers with that obtained from standard spin-wave theory and attribute the differences at low energy to the fact that the trimer formulation includes exactly the effects of intratrimer zero-point motion.

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Date Posted: 12 August 2015

This document has been peer reviewed.