TY - JOUR
T1 - Nonlinear response in overlapping and separated Landau levels of GaAs quantum wells
AU - Hatke, A. T.
AU - Zudov, M. A.
AU - Pfeiffer, L. N.
AU - West, K. W.
PY - 2012/8/28
Y1 - 2012/8/28
N2 - We have studied magnetotransport properties of a high-mobility two-dimensional electron system subject to weak electric fields. At low magnetic field B, the differential resistivity acquires a correction δrλ2j2/B2, where λ is the Dingle factor and j is the current density, in agreement with theoretical predictions. At higher magnetic fields, however, δr becomes B independent, δrj2. While the observed change in behavior can be attributed to a crossover from overlapping to separated Landau levels, full understanding of this behavior remains a subject of future theories.
AB - We have studied magnetotransport properties of a high-mobility two-dimensional electron system subject to weak electric fields. At low magnetic field B, the differential resistivity acquires a correction δrλ2j2/B2, where λ is the Dingle factor and j is the current density, in agreement with theoretical predictions. At higher magnetic fields, however, δr becomes B independent, δrj2. While the observed change in behavior can be attributed to a crossover from overlapping to separated Landau levels, full understanding of this behavior remains a subject of future theories.
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U2 - 10.1103/PhysRevB.86.081307
DO - 10.1103/PhysRevB.86.081307
M3 - Article
AN - SCOPUS:84865676029
SN - 1098-0121
VL - 86
JO - Physical Review B - Condensed Matter and Materials Physics
JF - Physical Review B - Condensed Matter and Materials Physics
IS - 8
M1 - 081307
ER -