University
of Toronto
Physics Department
Quantum Optics and Condensed Matter
MONDAY SEMINAR
University
of Toronto
| Speaker : | DR. TETSURO NIKUNI
Department of Physics University of Toronto |
| Topic : | BOSE CONDENSATION OF MAGNONS IN A QUANTUM SPIN SYSTEM
|
| Time : | Monday, February 5, 2001 at 12:10 p.m. |
| Place : | Room MP408, Burton Tower 60 St. George Street / 255 Huron Street |
Abstract
Recent experimental studies of the field-induced antiferromagnetic ordering in the double chain spin-gap magnetic compound TlCuCl3 are not easily explained by traditional dimer models. We have recently shown that a theory based on a Bose condensation of the magnons in this compound gives reasonable agreement with the temperature dependence of the magnetization. We use a Hartree-Fock approximation, analogous to that recently developed for atomic Bose gases REF: T. Nikuni et al, PRL84, 5868 (2000).
Local Host: Prof. Allan Griffin 
(416-978-5199)