TY - JOUR
T1 - Shubnikov-de Haas oscillations in GaAs quantum wells in tilted magnetic fields
AU - Hatke, A. T.
AU - Zudov, M. A.
AU - Pfeiffer, L. N.
AU - West, K. W.
PY - 2012/6/18
Y1 - 2012/6/18
N2 - We report on quantum magneto-oscillations in an ultrahigh 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 an ultrahigh 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.
UR - http://www.scopus.com/inward/record.url?scp=84863321905&partnerID=8YFLogxK
UR - http://www.scopus.com/inward/citedby.url?scp=84863321905&partnerID=8YFLogxK
U2 - 10.1103/PhysRevB.85.241305
DO - 10.1103/PhysRevB.85.241305
M3 - Article
AN - SCOPUS:84863321905
SN - 1098-0121
VL - 85
JO - Physical Review B - Condensed Matter and Materials Physics
JF - Physical Review B - Condensed Matter and Materials Physics
IS - 24
M1 - 241305
ER -