Abstract
${\mathrm{TlCuCl}}_{3}$ has a singlet ground state with the excitation gap $\ensuremath{\Delta}=0.65 \mathrm{meV}.$ The magnetic excitations in ${\mathrm{TlCuCl}}_{3}$ have been investigated by means of neutron inelastic-scattering experiments. The constant-$\mathit{Q}$ energy scan profiles were collected in the ${a}^{*}\ensuremath{-}{c}^{*}$ plane. A well-defined single magnetic excitation mode was observed. The dispersion relations along four different directions were determined. The lowest excitation occurs at $\mathit{Q}=(h,0,l)$ with integer h and odd l, as observed in ${\mathrm{KCuCl}}_{3}.$ A cluster series expansion up to the sixth order was applied to analyze the dispersion relations, and the individual exchange interactions were evaluated. It was demonstrated that ${\mathrm{TlCuCl}}_{3}$ is a strongly coupled spin-dimer system.
Talk to us
Join us for a 30 min session where you can share your feedback and ask us any queries you have
Disclaimer: All third-party content on this website/platform is and will remain the property of their respective owners and is provided on "as is" basis without any warranties, express or implied. Use of third-party content does not indicate any affiliation, sponsorship with or endorsement by them. Any references to third-party content is to identify the corresponding services and shall be considered fair use under The CopyrightLaw.