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Peculiarity in the cyclotron radiation and emission in graphene is theoretically examined in terms of the optical conductivity and relaxation rates to propose that graphene in magnetic fields can be a candidate for realizing the Landau-level laser, proposed decades ago [H. Aoki, Appl. Phys. Lett. 48, 559 (1986)].
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Morimoto et al. (2008) studied this question.
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