Realization of Bose-Einstein condensation of dilute magnons in TlCuCl${}_3$

Abstract

The recent observation [Oosawa et al. J. Phys. : Condens. Matter {\bf 11}, 265 (1999)] of the field-induced Néel ordering in a spin-gap magnetic compound TlCuCl${}_3$ is interpreted as a Bose-Einstein Condensation of magnons. A mean-field calculation based on this picture is shown to describe well the temperature dependence of the magnetization. The present system opens a new area for studying Bose-Einstein condensation of thermodynamically large number of particles in a grand-canonical ensemble.

4 pages, revtex, 4 eps figures

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• Spin functional renormalization group for dimerized quantum spin systems
• Experimental tests for macroscopic phase coherence in magnetic-quasiparticle condensates of insulating spin systems
• Inter-chain Interactions, Multi-magnon condensation and Strain effect in chain compound NaVOPO${}_4$
• \muSR-dtected Soft mode toward a Possible Phase Transition in disordered spin gap system (CH3)2CHNH3-Cu(ClxBr1-x)3
• Temperature dependence of spin currents in one- and three-dimensional insulators
• The effects of next to nearest neighbor hopping on Bose-Einstein condensation in cubic lattices
• Brillouin-Mandelstam Light Scattering Spectroscopy: Applications in Phononics and Spintronics
• Bose-Einstein condensations of magnons in quantum magnets with spin-orbit coupling in a Zeeman field
• Termodinámica de un gas magnetizado de bosones vectoriales neutros
• Coupled dimerized alternating-bond quantum spin chains in the distorted honeycomb-lattice magnet Cu${}_5$SbO${}_6$
• Spin-orbital gap of multiorbital antiferromagnet
• Ferroelectricity in a magnon Bose-Einstein condensate: Nonreciprocal superfluidity, exceptional points, and Majorana bosons
• Quantum Spin Superfluid from Bose-Einstein Condensation of Spinons in Pyrochlore Spin Ice