Physics – Condensed Matter – Strongly Correlated Electrons
Scientific paper
2007-12-13
Nature Physics 4, 198-204 (2008)
Physics
Condensed Matter
Strongly Correlated Electrons
17 pages, 3 figures
Scientific paper
10.1038/nphys893
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.
Giamarchi Thierry
Rüegg Ch.
Tchernyshyov Oleg
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