Kulik, L. V. and Kukushkin, I. V. and Dickmann, S. and Kirpichev, V. E. and Vankov, A. B. and Parakhonsky, A. L. and Smet, J. H. and Klitzing, Klaus von and Wegscheider, Werner
Cyclotron spin-flip mode as the lowest-energy excitation of unpolarized integer quantum Hall states.
Physical Review B 72 (7), 073304.
The cyclotron spin-flip modes of spin unpolarized integer quantum Hall states (ν=2,4,6) 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.