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26 April 2024

» arxiv » cond-mat/0301424

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Massive triplet excitations in a magnetized anisotropic Haldane spin chain
A. Zheludev ; Z. Honda ; C. Broholm ; K. Katsumata ; S. M. shapiro ; A. Kolezhuk ; S. Park ; Y. Qiu ;
Date:	22 Dec 2002
Subject:	Strongly Correlated Electrons \| cond-mat.str-el
Abstract:	Inelastic neutron scattering experiments on the Haldane-gap quantum antiferromagnet d are performed at mK temperatures in magnetic fields of almost twice the critical field $H_c$ applied perpendicular to the spin cahins. Above $H_c$ a re-opening of the spin gap is clearly observed. In the high-field Néel-ordered state the spectrum is dominated by three distinct long-lived excitation branches. Several field-theoretical models are tested in a quantitative comparison with the experimental data.
Source:	arXiv, cond-mat/0301424
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