Elementary excitations in the hybrid Bose-Fermi system induced by circularly polarized light in a two-dimensional gas of charge carriers with different masses

M. V. Boev; O. V. Kibis; V. M. Kovalev

Elementary excitations in the hybrid Bose-Fermi system induced by circularly polarized light in a two-dimensional gas of charge carriers with different masses

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arxiv 2310.15864 v1 pith:PBDBXX5S submitted 2023-10-24 cond-mat.mes-hall cond-mat.str-elcond-mat.supr-con

V. M. Kovalev , M. V. Boev , O. V. Kibis This is my paper · ORCID

classification cond-mat.mes-hallcond-mat.str-elcond-mat.supr-con

keywords excitationsdifferentmassessubsystemcarrierschargefermisystem

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We developed a theory describing elementary excitations in the Bose-Fermi system induced by circularly polarized light in a two-dimensional (2D) gas of charge carriers with different masses. In such a hybrid system, the Fermi subsystem is a degenerate Fermi gas, whereas the Bose subsystem is a condensate of the light-induced composite bosons consisting of two fermions (electrons or holes) with different effective masses. The interaction of the single-particle excitations and the collective excitations (plasmons) in the Fermi subsystem with the Bogoliubov collective modes (bogolons) in the Bose subsystem is analyzed. The renormalization and damping (lifetime) of the excitations are calculated, and the possibility of their experimental observation is discussed. The developed theory can be applied to describe 2D condensed-matter structures containing charge carriers with different effective masses, including transition metal dichalcogenide monolayers and semiconductor quantum wells.

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