Wave function of a microwave-driven Bose-Einstein magnon condensate

Journal Article · Fri Jan 01 04:00:00 EST 2010 · Physical Review. B, Condensed Matter and Materials Physics

DOI:https://doi.org/10.1103/PHYSREVB.81.020414· OSTI ID:21366652

Rezende, Sergio M ^[1]

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1. 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, Journal Name: Physical Review. B, Condensed Matter and Materials Physics Journal Issue: 2 Vol. 81; ISSN 1098-0121
• Country of Publication: United States
• Language: English

Related Subjects

75 CONDENSED MATTER PHYSICS
SUPERCONDUCTIVITY AND SUPERFLUIDITY
BOSE-EINSTEIN CONDENSATION
CONDENSATES
DISTRIBUTION
ELECTROMAGNETIC RADIATION
EQUATIONS
FERRITE GARNETS
FILMS
FUNCTIONS
MAGNONS
MICROWAVE RADIATION
MINERALS
OXIDE MINERALS
QUASI PARTICLES
RADIATIONS
SPATIAL DISTRIBUTION
TEMPERATURE RANGE
TEMPERATURE RANGE 0273-0400 K
TRANSITION ELEMENT COMPOUNDS
WAVE FUNCTIONS
YTTRIUM COMPOUNDS