Magnon Kinetics and Bose-Einstein Condensation Studied in Phase Space

Journal Article · Fri Dec 19 04:00:00 EST 2008 · Physical Review Letters

DOI:https://doi.org/10.1103/PHYSREVLETT.101.257201· OSTI ID:21180037

Demidov, V E; Dzyapko, O; Buchmeier, M; Demokritov, S O ^[1]; Stockhoff, T; Schmitz, G ^[2]; Melkov, G A ^[3]

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1. Institute for Applied Physics, University of Muenster, 48149 Muenster (Germany)
2. Institute of Material Physics, University of Muenster, 48149 Muenster (Germany)
3. Department of Radiophysics, National Taras Schevchenko University of Kiev, Kiev (Ukraine)

Using a novel technique providing simultaneous resolution with respect to the wave vector and frequency of magnons, we observed the formation of a Bose-Einstein condensate documented by the narrowing of the magnon distribution in phase space. Based on the measured width of the distribution we determined the effective correlation length of the condensate, which appears to be anisotropic, reflecting the anisotropy of the magnon dispersion spectrum.

• OSTI ID: 21180037
• Journal Information: Physical Review Letters, Journal Name: Physical Review Letters Journal Issue: 25 Vol. 101; ISSN 0031-9007; ISSN PRLTAO
• Country of Publication: United States
• Language: English

Related Subjects

71 CLASSICAL AND QUANTUM MECHANICS
GENERAL PHYSICS
ANISOTROPY
BOSE-EINSTEIN CONDENSATION
KINETICS
MAGNONS
PHASE SPACE