TITLE

Odd filling factor quantum Hall sequence in magnetic type-III quantum wells

AUTHOR(S)
Buhmann, H.; Novik, E. G.; Daumer, V.; Liu, J.; Gui, Y. S.; Becker, C. R.; Molenkamp, L. W.
PUB. DATE
May 2005
SOURCE
Applied Physics Letters;5/23/2005, Vol. 86 Issue 21, p212104
SOURCE TYPE
Academic Journal
DOC. TYPE
Article
ABSTRACT
The magnetotransport properties of a series of Hg1-yMnyTe quantum wells (y=2%) reveal anomalous sequences of quantum Hall plateaus and corresponding minima in the longitudinal magnetoresistance which correspond solely to odd filling factors. This anomaly originates from the very large spin splitting in this material, which exceeds the cyclotron energy even at moderate magnetic fields (B>2T). An 8×8 band k·p approach has been used to calculate the magnetic field dependence of the Landau levels. Finite temperature and Landau level broadening considerations confirm that subband crossings in the vicinity of the Fermi energy are responsible for the suppression of even filling factor quantum Hall states.
ACCESSION #
17226921

 

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