Bose-Einstein Condensation of Magnons in NiCl2-4SC(NH2)2

Abstract

A Bose-Einstein condensation (BEC) has been observed in magnetic insulators in the last decade. The bosons that condensed are magnons, associated with an ordered magnetic phase induced by a magnetic field. We review the experiments in the spin-gap compound NiCl2-4SC(NH2)2, in which the formation of BEC occurs by applying a magnetic field at low temperatures. This is a contribution to the celebration for the 50th anniversary of the Solid State and Low Temperature Laboratory of the University of São Paulo, where this compound was first magnetically characterized.

13 pages, 11 figures; Braz. J. Phys. 42 (2012)

References in corpus (11)

• Many-Body Physics with Ultracold Gases
• Bose-Einstein Condensation in Magnetic Insulators
• Dimensional reduction at a quantum critical point
• Bose-Einstein Condensation of Magnons in TlCuCl3: Phase diagram and specific heat from a self-consistent Hartee-Fock calculation with a realistic dispersion relation
• A direct measurement of the Bose-Einstein Condensation universality class in NiCl${}_2$-4SC(NH${}_2$)${}_2$ at ultra-low temperatures
• Consequences of spin-orbit coupling for the Bose-Einstein condensation of magnons
• Character of magnetic excitations in a quasi-one-dimensional antiferromagnet near the quantum critical points: Impact on magneto-acoustic properties
• Field-driven phase transitions in a quasi-two-dimensional quantum antiferromagnet
• Critical properties and Bose Einstein Condensation in dimer spin systems
• Spin Dynamics of $NiC{l}_2-4SC(N{H}_2{)}_2$ in the Field-Induced Ordered Phase
• Bose-Einstein condensation in antiferromagnets close to the saturation field