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arXiv · 1807.06619

Giant spin Meissner effect in a non-equilibrium exciton-polariton gas

M. Król·R. Mirek·D. Stephan·K. Lekenta·J. -G. Rousset·W. Pacuski·A. V. Kavokin·M. Matuszewski·J. Szczytko·B. Piętka
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Abstract

The suppression of Zeeman energy splitting due to spin-dependent interactions within a Bose-Einstein condensate (the spin Meissner effect) was predicted to occur up to a certain value of magnetic field strength. We report a clear observation of this effect in semimagnetic microcavities which exhibit the giant Zeeman energy splitting between two spin-polarised polariton states as high as 2 meV, and demonstrate that partial suppression of energy difference occurs already in the uncondensed phase in a striking similarity to the up-critical superconductors in the fluctuation dominated regime. These observations are explained quantitatively by a kinetic model accounting for both the condensed and uncondensed polaritons and taking into account the non-equilibrium character of the system.

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M. Król, R. Mirek, D. Stephan, K. Lekenta, J. -G. Rousset, W. Pacuski, A. V. Kavokin, M. Matuszewski, J. Szczytko, B. Piętka. 2018-07-17. Giant spin Meissner effect in a non-equilibrium exciton-polariton gas. https://doi.org/10.1103/physrevb.99.115318

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