Bose-Einstein condensation of magnons in atomic hydrogen gas. Academic Article uri icon

abstract

  • We report on experimental observation of Bose-Einstein condensation (BEC)-like behavior of quantized electron spin waves (magnons) in a dense gas of spin-polarized atomic hydrogen. The magnons are trapped and controlled with inhomogeneous magnetic fields and described by a Schrdinger-like wave equation, in analogy to the BEC experiments with neutral atoms. We have observed the appearance of a sharp feature in the ESR spectrum displaced from the normal spin wave spectrum. We believe that this observation corresponds to a sudden growth of the ground-state population of the magnons and emergence of their spontaneous coherence for hydrogen gas densities exceeding a critical value, dependent on the trapping potential. We interpret the results as a BEC of nonequilibrium magnons which were formed by applying the rf power.

published proceedings

  • Phys Rev Lett

author list (cited authors)

  • Vainio, O., Ahokas, J., Jrvinen, J., Lehtonen, L., Novotny, S., Sheludiakov, S., ... Lee, D. M.

publication date

  • January 1, 2015 11:11 AM