TY - JOUR
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 - 2013/1/1
Y1 - 2013/1/1
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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U2 - 10.1088/1742-6596/456/1/012041
DO - 10.1088/1742-6596/456/1/012041
M3 - Conference article
AN - SCOPUS:84885023864
SN - 1742-6588
VL - 456
JO - Journal of Physics: Conference Series
JF - Journal of Physics: Conference Series
IS - 1
M1 - 012041
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 -