Two-subband quantum Hall effect in parabolic quantum wells

Details Two-subband quantum Hall effect in parabolic quantum wells Two-subband quantum Hall effect in parabolic quantum wells

2006-02-10

arxiv.org/abs/cond-mat/0602271v1

Phys. Rev. B 74, 195313 (2006)

Physics

Condensed Matter

Mesoscale and Nanoscale Physics

5 pages, submitted

Scientific paper

10.1103/PhysRevB.74.195313

The low-temperature magnetoresistance of parabolic quantum wells displays pronounced minima between integer filling factors. Concomitantly the Hall effect exhibits overshoots and plateau-like features next to well-defined ordinary quantum Hall plateaus. These effects set in with the occupation of the second subband. We discuss our observations in the context of single-particle Landau fan charts of a two-subband system empirically extended by a density dependent subband separation and an enhanced spin-splitting g*.

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