Influence of the single-particle Zeeman energy on the quantum Hall ferromagnet at high filling factors

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Piot, B. A.
Maude, D. K.
Henini, M.
Wasilewski, Z. R.
Gupta, J. A.
Friedland, K. J.
Hey, R.
Ploog, K. H.
Gennser, U.
Cavanna, A.
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Abstract
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In a recent paper [B. A. Piot et al., Phys. Rev. B 72, 245325 (2005)], we have shown that the lifting of the electron spin degeneracy in the integer quantum Hall effect at high filling factors should be interpreted as a magnetic-field-induced Stoner transition. In this work, we extend the analysis to investigate the influence of the single-particle Zeeman energy on the quantum Hall ferromagnet at high filling factors. The single-particle Zeeman energy is tuned through the application of an additional in-plane magnetic field. Both the evolution of the spin polarization of the system and the critical magnetic field for spin splitting are well described as a function of the tilt angle of the sample in the magnetic field.
Comment: Published in Phys. Rev. B
Keywords
Condensed Matter - Mesoscale and Nanoscale Physics
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