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25 April 2024

» arxiv » cond-mat/0105223

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Spin dynamics in the $S=1/2$ weakly-coupled chains antiferromagnet BaCu$_2$Si$_2$O$_7$
A. Zheludev ; M. Kenzelmann ; S. Raymond ; T. Masuda ; K. Uchinokura ; S.-H. Lee ;
Date:	10 May 2001
Subject:	Strongly Correlated Electrons \| cond-mat.str-el
Abstract:	Inelastic neutron scattering is used to identify single-particle and continuum spin excitations in the quasi-one-dimensional $S=1/2$ antiferromagnet a. In the data analysis, close attention is given to resolution effects. A gap in the continuum spectrum at $Delta_c=4.74.8$ meV is directly observed. The gap energy is in excellent agreement with existing theoretical predictions. Below the gap, the spectrum is dominated by sharp accoustic spin wave excitations.
Source:	arXiv, cond-mat/0105223
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