Kinetics of Strongly Nonequilibrium Magnon Gas Leading to Bose-Einstein Condensation

Author(s) D.V. Slobodianiuk, O.V. Prokopenko

Taras Shevchenko National University of Kyiv, 64/13, Volodymyrska Str., 01601 Kyiv, Ukraine

Issue Volume 9, Year 2017, Number 3
Dates Received 21 March 2017; revised manuscript received 26 April 2017; published online 30 June 2017
Citation D.V. Slobodianiuk, O.V. Prokopenko, J. Nano- Electron. Phys. 9 No 3, 03033 (2017)
DOI 10.21272/jnep.9(3).03033
PACS Number(s) 75.30.Ds, 75.45. + j
Key words Kinetic equation, Bose-Einstein condensation, Magnon, Kinetic instability.
Annotation Kinetic equations describing nonequilibrium magnon gas under the action of parametric pumping are considered with an account of kinetic instability processes. These processes strongly influence condition of magnon Bose-Einstein condensate formation. It is shown that the number of condensed magnons increases and the threshold of condensate formation decreases when kinetic instability processes are present in a system. Obtained results are important for further development of Bose-Einstein condensation theory for nonequilibrium magnons in magnetics.