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Theory of Spin-Split Cyclotron Resonance in the Extreme Quantum Limit

N. R. Cooper·J. T. Chalker
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Abstract

We present an interpretation of recent cyclotron resonance experiments on the two-dimensional electron gas in GaAs/AlGaAs heterostructures. We show that the observed dependence of the resonance spectrum on Landau level occupancy and temperature arises from the interplay of three factors: spin-splitting of the cyclotron frequency; thermal population of the two spin states; and coupling of the resonances for each spin orientation by Coulomb interactions. In addition, we derive an $f$-sum rule which allows spin polarisation to be determined directly from resonance spectra.

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N. R. Cooper, J. T. Chalker. 1994-01-24. Theory of Spin-Split Cyclotron Resonance in the Extreme Quantum Limit. https://doi.org/10.1103/physrevlett.72.2057

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