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Observation of exchange Coulomb interactions in the quantum Hall state at nu=3

Authors :
Van'kov, A. B.
Rhone, T. D.
Pinczuk, A.
Kukushkin, I. V.
Pfeiffer, L. N.
West, K. W.
Publication Year :
2010

Abstract

Coulomb exchange interactions of electrons in the nu=3 quantum Hall state are determined from two inter-Landau level spin-flip excitations measured by resonant inelastic light scattering. The two coupled collective excitations are linked to inter-Landau level spin-flip transitions arising from the N=0 and N=1 Landau levels. The strong repulsion between the two spin-flip modes in the long-wave limit is clearly manifested in spectra displaying Coulomb exchange contributions that are comparable to the exchange energy for the quantum Hall state at nu=1. Theoretical calculations within the Hartree-Fock approximation are in a good agreement with measured energies of spin-flip collective excitations.<br />Comment: 5 pages, 3 figures, to appear in PRB Rapid Communications

Details

Database :
arXiv
Publication Type :
Report
Accession number :
edsarx.1011.2022
Document Type :
Working Paper
Full Text :
https://doi.org/10.1103/PhysRevB.83.245325