Open AccessShifted Landau ladders and low field magneto-oscillations in high-mobility GaAs 2D hole systems
Author(s) -
Po Zhang,
Jianli Wang,
Chi Zhang,
Rui-Rui Du,
L. N. Pfeiffer,
K. W. West
Publication year - 2017
Publication title -
applied physics letters
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 1.182
H-Index - 442
eISSN - 1077-3118
pISSN - 0003-6951
DOI - 10.1063/1.4978673
Subject(s) - condensed matter physics , landau quantization , oscillation (cell signaling) , shubnikov–de haas effect , physics , quantum oscillations , magnetic field , magneto , cyclotron , quantum well , scattering , field (mathematics) , quantum hall effect , magnet , chemistry , quantum mechanics , laser , biochemistry , superconductivity , mathematics , fermi surface , pure mathematics
We present well-developed low-field magneto-resistance oscillations originating from zero-field spin splitting (ZFSS) of heavy holes in high mobility GaAs/AlGaAs quantum wells. This low field oscillation is 1/B-periodic and emerges before the onset of Shubnikov–de Haas oscillations. The effect can be explained by resonant scattering between two Landau ladders shifted by the ZFSS gap, which in turn can be measured by comparing with the hole cyclotron energy. A front gate is fabricated to tune the ZFSS and hence the oscillation period
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