Bose-Einstein condensation of magnons under incoherent pumping

Details Bose-Einstein condensation of magnons under incoherent pumping Bose-Einstein condensation of magnons under incoherent pumping

2008-12-04

arxiv.org/abs/0812.0953v1

Phys. Rev. Lett. 102, 187205 (2009)

Physics

Condensed Matter

Other Condensed Matter

Scientific paper

10.1103/PhysRevLett.102.187205

Bose-Einstein condensation in a gas of magnons pumped by an incoherent pumping source is experimentally studied at room temperature. We demonstrate that the condensation can be achieved in a gas of bosons under conditions of incoherent pumping. Moreover, we show the critical transition point is almost independent of the frequency spectrum of the pumping source and is solely determined by the density of magnons. The electromagnetic power radiated by the magnon condensate was found to scale quadratically with the pumping power, which is in accordance with the theory of Bose-Einstein condensation in magnon gases.

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