Dynamic Phase Diagram of the DC-Pumped Magnon Condensates

ORAL

Abstract

We investigate the effects of nonlinear dynamics and damping by phonons on a system of electronically pumped Bose-Einstein condensed or normal phase magnons in a ferromagnet. The nonlinear effects are crucial to understanding the phenomenon of ``swasing." Meanwhile damping was heretofore neglected, since the pumped magnon condensates previously considered are quasi-equilibrium and considered only a much shorter timescale. We analyze the magnetic phase behavior in the presence of these two new effects, demonstrating the possibility of stable condensate and hysteresis.

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Authors

  • Scott Bender

    • Department of Physics and Astronomy, University of California, Los Angeles

  • Rembert Duine

    • Institute for Theoretical Physics, Utrecht University
    • Utrecht University

  • Arne Brataas

    • Department of Physics, Norwegian University of Science and Technology

  • Yaroslav Tserkovnyak

    • Department of Physics and Astronomy, University of California, Los Angeles
    • Univ of California - Los Angeles
    • University of California, Los Angeles
    • UCLA
    • University of California Los Angeles