We report striking magneto-oscillations in the current-voltage characteristics of a double-barrier resonant-tunneling structure under longitudinal magnetic field. We have identified, for the first time, inter-Landau-level resonant tunneling with Landau-level indices changed by as large as six, two distinct LO-phonon-emission-assisted resonant tunneling, and a combination of the two. The voltage-to-energy conversion is experimentally calibrated, which makes tunneling spectroscopy possible. Our experiment is a manifestation of the two-dimensionality of the source electrons.
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Yang et al. (1989) studied this question.
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