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Updated: Aug 17, 2026

Spatial Separation of Molecular Conformers and Clusters
Published on: January 9, 2014
Energy separation of single-particle and continuum states in an S = 1/2 weakly coupled chains antiferromagnet
Zheludev1, Kenzelmann, Raymond
1Physics Department, Brookhaven National Laboratory, Upton, New York 11973-5000, USA.
Abstract:
Inelastic neutron scattering is used to study transverse-polarized magnetic excitations in the quasi-one-dimensional S = 1/2 antiferromagnet BaCu2Si2O7, where the saturation value for the Neel order parameter is m(0) = 0.12&mgr;(B) per spin. At low energies the spectrum is totally dominated by resolution-limited spin-wave-like excitations. An excitation continuum sets in above a well-defined threshold frequency. Experimental results are discussed in the context of current theories for weakly interacting quantum half-integer-spin chains.
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