Inelastic neutron scattering signal from deconfined spinons in a fractionalized antiferromagnet

Details Inelastic neutron scattering signal from deconfined spinons in a fractionalized antiferromagnet Inelastic neutron scattering signal from deconfined spinons in a fractionalized antiferromagnet

2002-04-17

arxiv.org/abs/cond-mat/0204382v1

Physics

Condensed Matter

Strongly Correlated Electrons

9 pages

Scientific paper

10.1142/S0217979203015802

We calculate the contribution of deconfined spinons to inelastic neutron scattering (INS) in the fractionalized antiferromagnet (AF*), introduced elsewhere. We find that the presence of free spin-1/2 charge-less excitations leads to a continuum INS signal above the Neel gap. This signal is found above and in addition to the usual spin-1 magnon signal, which to lowest order is the same as in the more conventional confined antiferromagnet. We calculate the relative weights of these two signals and find that the spinons contribute to the longitudinal response, where the magnon signal is absent to lowest order. Possible higher-order effects of interactions between magnons and spinons in the AF* phase are also discussed.

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