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We calculate dynamical structure factors of the S=1 bond-alternatingHeisenberg chain with a single-ion anisotropy in transverse magnetic fields,using a continued fraction method based on the Lanczos algorithm. In theHaldane-gap phase and the dimer phase, dynamical structure factors showcharacteristic field dependence. Possible interpretations are discussed. Thenumerical results are in qualitative agreement with recent results forinelastic neutron-scattering experiments on the S=1 bond-alternatingHeisenberg-chain compound $\rm{Ni(C_{9}D_{24}N_{4})(NO_{2})ClO_{4}}$ and theS=1 Haldane-gap compound $\rm{Ni(C_{5}D_{14}N_{2})_{2}N_{3}(PF_{6})}$ intransverse magnetic fields.Comment: 7 pages, 6 figure

physical review. b, condensed matter and materials physics

Dynamical properties of<mml:math xmlns:mml="http://www.w3.org/1998/Math/MathML" display="inline"><mml:mrow><mml:mi>S</mml:mi><mml:mo>=</mml:mo><mml:mn>1</mml:mn></mml:mrow></mml:math>bond-alternating Heisenberg chains in transverse magnetic fields

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