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

Spin dynamics in the $S=1/2$ weakly-coupled chains antiferromagnet BaCu$_2$Si$_2$O$_7$

Strongly Correlated Electrons 2007-05-23 v1

Authors: A. Zheludev , M. Kenzelmann , S. Raymond , T. Masuda , K. Uchinokura , S. -H. Lee

Abstract

Inelastic neutron scattering is used to identify single-particle and continuum spin excitations in the quasi-one-dimensional $S=1/2$ antiferromagnet \ba. 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.

Keywords

spin dynamics antiferromagnet neutron scattering BaCu$_2$Si$_2$O$_7$ continuum spectrum

Cite

@article{arxiv.cond-mat/0105223,
  title  = {Spin dynamics in the $S=1/2$ weakly-coupled chains antiferromagnet BaCu$_2$Si$_2$O$_7$},
  author = {A. Zheludev and M. Kenzelmann and S. Raymond and T. Masuda and K. Uchinokura and S. -H. Lee},
  journal= {arXiv preprint arXiv:cond-mat/0105223},
  year   = {2007}
}

Comments

9 pages 8 figures

Related papers

View all related →