Magneto-fermionic condensate under study is a Bose-Einstein condensate of cyclotron spin-flip magnetoexcitons in a quantum Hall insulator. This condensate features unique properties such as millisecond range lifetime and hundreds of micrometers of propagation length. In this study, utilizing the photo-induced resonant reflection technique, we measured the exciton escape time. Finally, we estimated the exciton condensate propagation velocity as 25 m/s, which is much higher than a single particle propagation velocity. We also proposed a mechanism of exciton condensation.
Spin transport in the bulk of two-dimensional Hall insulator
L. V. Kulik, A. V. Gorbunov, A. S. Zhuravlev, V. A. Kuznetsov, I. V. Kukushkin; Spin transport in the bulk of two-dimensional Hall insulator. Appl. Phys. Lett. 11 February 2019; 114 (6): 062403. https://doi.org/10.1063/1.5078730
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