Dynamical properties of S=1 bond-alternating Heisenberg chains in transverse magnetic fields

Details Dynamical properties of S=1 bond-alternating Heisenberg chains in transverse magnetic fields Dynamical properties of S=1 bond-alternating Heisenberg chains in transverse magnetic fields

2005-05-09

arxiv.org/abs/cond-mat/0505196v1

Physics

Condensed Matter

Strongly Correlated Electrons

7 pages, 6 figures

Scientific paper

10.1103/PhysRevB.72.014434

We calculate dynamical structure factors of the S=1 bond-alternating Heisenberg chain with a single-ion anisotropy in transverse magnetic fields, using a continued fraction method based on the Lanczos algorithm. In the Haldane-gap phase and the dimer phase, dynamical structure factors show characteristic field dependence. Possible interpretations are discussed. The numerical results are in qualitative agreement with recent results for inelastic neutron-scattering experiments on the S=1 bond-alternating Heisenberg-chain compound $\rm{Ni(C_{9}D_{24}N_{4})(NO_{2})ClO_{4}}$ and the S=1 Haldane-gap compound $\rm{Ni(C_{5}D_{14}N_{2})_{2}N_{3}(PF_{6})}$ in transverse magnetic fields.

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