Bose-Einstein Condensation in Magnetic Insulators
T. Giamarchi, Ch. R\"uegg, O. Tchernyshyov
TL;DR
This paper discusses how magnons in antiferromagnetic insulators can be controlled by magnetic fields to form a Bose-Einstein condensate, offering insights into quantum phase transitions and exotic quantum states.
Contribution
It highlights the experimental realization of magnon BEC in magnetic insulators and its significance for studying quantum phase transitions.
Findings
Magnon density can be controlled by magnetic fields.
Magnon BEC observed in various magnetic materials.
Provides a platform for exploring quantum phase transitions.
Abstract
The elementary excitations in antiferromagnets are magnons, quasiparticles with integer spin and Bose statistics. In an experiment their density is controlled efficiently by an applied magnetic field and can be made finite to cause the formation of a Bose-Einstein condensate (BEC). Studies of magnon condensation in a growing number of magnetic materials provide a unique window into an exciting world of quantum phase transitions (QPT) and exotic quantum states.
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