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

A. Zheludev, M. Kenzelmann, S. Raymond +3

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, clos…