Shubnikov-de haas oscillations in high mobility GaAs quantum wells in tilted magnetic fields

A. T. Hatke, M. A. Zudov, L. N. Pfeiffer, K. W. West

Research output: Contribution to journalConference articlepeer-review

Abstract

We report on quantum magneto-oscillations in a high mobility GaAs/AlGaAs quantum well at very high (≥ 87°) tilt angles. Unlike previous studies, we find that the spin and cyclotron splittings become equal over a continuous range of angles, but only near certain, angle-dependent filling factors. At high enough tilt angles, Shubnikov-de Haas oscillations reveal a prominent beating pattern, indicative of consecutive level crossings, all occurring at the same angle. We explain these unusual observations by an in-plane field-induced increase of the carrier mass, which leads to accelerated, filling factor-driven crossings of spin sublevels in tilted magnetic fields.

Original languageEnglish (US)
Article number012041
JournalJournal of Physics: Conference Series
Volume456
Issue number1
DOIs
StatePublished - Jan 1 2013
Event20th International Conference on the Application of High Magnetic Fields in Semiconductor Physics, HMF 2012 - Chamonix Mont Blanc, France
Duration: Jul 22 2012Jul 27 2012

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