Quasi-elastic neutron scattering in the high-field phase of a Haldane antiferromagnet

Details Quasi-elastic neutron scattering in the high-field phase of a Haldane antiferromagnet Quasi-elastic neutron scattering in the high-field phase of a Haldane antiferromagnet

2001-07-19

arxiv.org/abs/cond-mat/0107416v2

Physics

Condensed Matter

Strongly Correlated Electrons

Added to discussion section. v2: Updated figures

Scientific paper

10.1103/PhysRevLett.88.077206

Inelastic neutron scattering experiments on the Haldane-gap quantum
antiferromagnet NDMAP are performed in magnetic fields below and above the
critical field Hc at which the gap closes. Quasi-elastic neutron scattering is
found for H>Hc indicating topological excitations in the high field phase.

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