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

doi:10.1088/1742-6596/456/1/012041

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 journal › Conference article › peer-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 language	English (US)
Article number	012041
Journal	Journal of Physics: Conference Series
Volume	456
Issue number	1
DOIs	https://doi.org/10.1088/1742-6596/456/1/012041
State	Published - 2013
Externally published	Yes
Event	20th International Conference on the Application of High Magnetic Fields in Semiconductor Physics, HMF 2012 - Chamonix Mont Blanc, France Duration: Jul 22 2012 → Jul 27 2012

All Science Journal Classification (ASJC) codes

General Physics and Astronomy

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10.1088/1742-6596/456/1/012041

Cite this

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title = "Shubnikov-de haas oscillations in high mobility GaAs quantum wells in tilted magnetic fields",

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.",

author = "Hatke, {A. T.} and Zudov, {M. A.} and Pfeiffer, {L. N.} and West, {K. W.}",

year = "2013",

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language = "English (US)",

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T1 - Shubnikov-de haas oscillations in high mobility GaAs quantum wells in tilted magnetic fields

AU - Hatke, A. T.

AU - Zudov, M. A.

AU - Pfeiffer, L. N.

AU - West, K. W.

PY - 2013

Y1 - 2013

N2 - 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.

AB - 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.

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DO - 10.1088/1742-6596/456/1/012041

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AN - SCOPUS:84885023864

SN - 1742-6588

VL - 456

JO - Journal of Physics: Conference Series

JF - Journal of Physics: Conference Series

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T2 - 20th International Conference on the Application of High Magnetic Fields in Semiconductor Physics, HMF 2012

Y2 - 22 July 2012 through 27 July 2012

ER -

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

Abstract

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