Journal
PHYSICAL REVIEW LETTERS
Volume 84, Issue 16, Pages 3718-3721Publisher
AMERICAN PHYSICAL SOC
DOI: 10.1103/PhysRevLett.84.3718
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Inelastic magnetic neutron scattering reveals a localized spin resonance at 4.5 meV in the ordered phase of the geometrically frustrated cubic antiferromagnet ZnCr2O4. The resonance develops abruptly from quantum critical fluctuations upon cooling through a first order transition to a co-planar antiferromagnet at T-c = 12.5(5) K. We argue that this transition is a three dimensional analog of the spin-Peierls transition.
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