Department of Physics Papers

Document Type

Journal Article

Date of this Version

6-19-2006

Abstract

The spin wave excitations of the S = 5/2 kagomé lattice antiferromagnet KFe3(OH)6(SO4)2 have been measured using high-resolution inelastic neutron scattering. We directly observe a flat mode which corresponds to a lifted ‘‘zero energy mode,’’ verifying a fundamental prediction for the kagomé lattice. A simple Heisenberg spin Hamiltonian provides an excellent fit to our spin wave data. The antisymmetric Dzyaloshinskii-Moriya interaction is the primary source of anisotropy and explains the low-temperature magnetization and spin structure.

Comments

Suggested Citation:
Matan, K. et al. (2006). SpinWaves in the Frustrated Kagomé Lattice Antiferromagnet KFe3(OH)6(SO4)2. Physical Review Letters 96, 247201.

© 2006 American Physical Society
http://dx.doi.org/10.1103/PhysRevLett.96.247201

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Date Posted: 14 July 2011

This document has been peer reviewed.