Spin-liquid behavior in a kagome antiferromagnet: Deuteronium jarosite

Bjorn Fak, Fiona Coomer, Andrew Harrison, Dirk Visser, M E Zhitomirsky

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Abstract

The spin dynamics of the frustrated quasi-two-dimensional spin-5/2 Heisenberg antiferromagnetic kagome compound deuteronium jarosite, (D(3)O) Fe(3)(SO(4))(2)(OD)(6), has been studied using inelastic neutron scattering. The dynamic magnetic susceptibility shows a clear spin-liquid behavior with strong dynamic short-range correlations with staggered chirality, as seen from the wave vector dependence at finite-energy transfers. The magnetic scattering at low temperatures is gapless and extends out to at least 20 meV. The dynamics shows a non-exponential relaxation behavior but no dynamical w/T scaling. The characteristic energy (inverse relaxation rate) increases linearly with temperature.
Original languageEnglish
Article number17006
JournalEPL: A Letters Journal Exploring the Frontiers of Physics
Volume81
Issue number1
DOIs
Publication statusPublished - 2008

Keywords

  • pyrochlore antiferromagnet
  • simulation
  • magnetic excitations
  • neuton-scattering
  • potassium jarosite
  • range order
  • lattice

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