Quasielastic neutron scattering in the high-field phase of a Haldane antiferromagnet.
Inelastic neutron scattering experiments on the Haldane-gap quantum antiferromagnet Ni(C5D14N2)2-N3(PF6) are performed in magnetic fields below and above the critical field H(c) at which the gap closes. Quasielastic neutron scattering is found for H>H(c), indicating topological excitations in the high-field phase.
Zheludev
A
A
Physics Department, Brookhaven National Laboratory, Upton, New York 11973-5000, USA.
Honda
Z
Z
Chen
Y
Y
Broholm
C L
CL
Katsumata
K
K
Shapiro
S M
SM