Spin waves in the frustrated kagomé lattice antiferromagnet KFe 3(OH)6(SO4)2

K. Matan; D. Grohol; D. G. Nocera; T. Yildirim; A. B. Harris; S. H. Lee; S. E. Nagler; Y. S. Lee

doi:10.1103/PhysRevLett.96.247201

Spin waves in the frustrated kagomé lattice antiferromagnet KFe ₃(OH)₆(SO4)₂

K. Matan
, D. Grohol
, D. G. Nocera
, T. Yildirim
, A. B. Harris
, S. H. Lee
, S. E. Nagler
, Y. S. Lee

LIGO-Massachusetts Institute of Technology
NIST Center for Neutron Research
University of Pennsylvania School of Arts and Sciences
University of Virginia
Oak Ridge National Laboratory

Research output: Contribution to journal › Article › peer-review

148 Citations (Scopus)

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.

Original language	English
Article number	247201
Journal	Physical Review Letters
Volume	96
Issue number	24
DOIs	https://doi.org/10.1103/PhysRevLett.96.247201
Publication status	Published - 2006
Externally published	Yes

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10.1103/PhysRevLett.96.247201

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title = "Spin waves in the frustrated kagom{\'e} lattice antiferromagnet KFe 3(OH)6(SO4)2",

abstract = "The spin wave excitations of the S=5/2 kagom{\'e} 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 kagom{\'e} 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.",

author = "K. Matan and D. Grohol and Nocera, \{D. G.\} and T. Yildirim and Harris, \{A. B.\} and Lee, \{S. H.\} and Nagler, \{S. E.\} and Lee, \{Y. S.\}",

year = "2006",

doi = "10.1103/PhysRevLett.96.247201",

language = "English",

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journal = "Physical Review Letters",

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T1 - Spin waves in the frustrated kagomé lattice antiferromagnet KFe 3(OH)6(SO4)2

AU - Matan, K.

AU - Grohol, D.

AU - Nocera, D. G.

AU - Yildirim, T.

AU - Harris, A. B.

AU - Lee, S. H.

AU - Nagler, S. E.

AU - Lee, Y. S.

PY - 2006

Y1 - 2006

N2 - 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.

AB - 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.

UR - https://www.scopus.com/pages/publications/33745285730

U2 - 10.1103/PhysRevLett.96.247201

DO - 10.1103/PhysRevLett.96.247201

M3 - Article

AN - SCOPUS:33745285730

SN - 0031-9007

VL - 96

JO - Physical Review Letters

JF - Physical Review Letters

IS - 24

M1 - 247201

ER -

Spin waves in the frustrated kagomé lattice antiferromagnet KFe ₃(OH)₆(SO4)₂

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