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The Cyclotron Spin-Flip Mode as the Lowest-Energy Excitation of Unpolarized Integer Quantum Hall States

L. V. Kulik·I. V. Kukushkin·S. Dickmann·V. E. Kirpichev·A. B. Van'kov·A. L. Parakhonsky·J. H. Smet·K. von Klitzing·W. Wegscheider
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Abstract

The cyclotron spin-flip modes of spin unpolarized integer quantum Hall states ($ν=2,4$) have been studied with inelastic light scattering. The energy of these modes is significantly smaller compared to the bare cyclotron gap. Second order exchange corrections are held responsible for a negative energy contribution and render these modes the lowest energy excitations of unpolarized integer quantum Hall states.

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L. V. Kulik, I. V. Kukushkin, S. Dickmann, V. E. Kirpichev, A. B. Van'kov, A. L. Parakhonsky, J. H. Smet, K. von Klitzing, W. Wegscheider. 2008-04-27. The Cyclotron Spin-Flip Mode as the Lowest-Energy Excitation of Unpolarized Integer Quantum Hall States. https://doi.org/10.1103/physrevb.72.073304

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