Wave function of a microwave-driven Bose-Einstein magnon condensate
- Departamento de Fisica, Universidade Federal de Pernambuco, Recife 50670-901, PE (Brazil)
It has been observed experimentally that a magnon gas in a film of yttrium-iron garnet at room temperature driven by a microwave field exhibits Bose-Einstein condensation (BEC) when the driving power exceeds a critical value. In a previous paper we presented a model for the dynamics of the magnon system in wave-vector space that provides firm theoretical support for the formation of the BEC. Here we show that the wave function of the magnon condensate in configuration space satisfies a Gross-Pitaevskii equation similarly to other BEC systems. The theory is consistent with the previous model in wave-vector space, and its results are in qualitative agreement with recent measurements of the spatial distribution of the magnon condensate driven by a nonuniform microwave field.
- OSTI ID:
- 21366652
- Journal Information:
- Physical Review. B, Condensed Matter and Materials Physics, Vol. 81, Issue 2; Other Information: DOI: 10.1103/PhysRevB.81.020414; (c) 2010 The American Physical Society; ISSN 1098-0121
- Country of Publication:
- United States
- Language:
- English
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Related Subjects
SUPERCONDUCTIVITY AND SUPERFLUIDITY
BOSE-EINSTEIN CONDENSATION
CONDENSATES
EQUATIONS
FERRITE GARNETS
FILMS
MAGNONS
MICROWAVE RADIATION
SPATIAL DISTRIBUTION
TEMPERATURE RANGE 0273-0400 K
WAVE FUNCTIONS
YTTRIUM COMPOUNDS
DISTRIBUTION
ELECTROMAGNETIC RADIATION
FUNCTIONS
MINERALS
OXIDE MINERALS
QUASI PARTICLES
RADIATIONS
TEMPERATURE RANGE
TRANSITION ELEMENT COMPOUNDS