Sound attenuation on the Bose-Einstein condensation of magnons in TlCuCl3
E. Ya. Sherman, P. Lemmens, B. Busse, A. Oosawa, H. Tanaka
Abstract
We investigated experimentally and theoretically sound attenuation in the quantum spin system TlCuCl3 in magnetic fields at low temperatures. Near the point of Bose-Einstein condensation (BEC) of magnons a sharp peak in the sound attenuation is observed. The peak demonstrates a hysteresis as function of the magnetic field pointing to a first-order contribution to the transition. The sound damping has a Drude-like form arising as a result of hardcore magnon-magnon collisions. The strength of the coupling between lattice and magnons is estimated from the experimental data. The puzzling relationship between the transition temperature and the concentration of magnons is explained by their "relativistic" dispersion.
Create a lesson
Related papers
Spacetime Dynamics of Altermagnetic Magnons
Ali Emami Kopaei, Karthik Subramaniam Eswaran, Krzysztof Wohlfeld
Engineering Weak Universality with Quantum Dots
Warre Missiaen, Michael Wimmer, Natalia Chepiga
Lyapunov-controlled thermalization: an exact real-time example
Jonas Loy, Jan C. Louw
Multiconfigurational Analysis of Local Electronic Structure of RuO2 Using Relativistic Embedded Clusters
Zhosan I. A., Lomachuk Yu. V., Maltsev D. A. et al.
Unconstrained compact lattice QED2+1 coupled to phonons: Gauss sectors, orthogonal semimetal, and deconfined criticality
João C. Inácio, Fakher F. Assaad
Collective Charge-\(2e\) Bosonic Excitations in Charge-Ordered Systems
Ping Tang