Insulator, semiclassical oscillations and quantum Hall liquids at low magnetic fields
Journal
Journal of Physics Condensed Matter
Journal Volume
24
Journal Issue
40
Date Issued
2012
Author(s)
Lo, S.-T.
Wang, Y.-T.
Bohra, G.
Comfort, E.
Lin, T.-Y.
Kang, M.-G.
Strasser, G.
Bird, J.P.
Huang, C.F.
Lin, L.-H.
Chen, J.C.
Abstract
Magneto-transport measurements are performed on two-dimensional GaAs electron systems to probe the quantum Hall (QH) effect at low magnetic fields. Oscillations following the Shubnikov-de Haas (SdH) formula are observed in the transition from the insulator to QH liquid when the observed almost temperature-independent Hall slope indicates insignificant interaction correction. Our study shows that the existence of SdH oscillations in such a transition can be understood based on the non-interacting model. © 2012 IOP Publishing Ltd.
Other Subjects
Electron systems; GaAs; Interaction corrections; Low magnetic fields; Magneto-transport measurement; Quantum hall; Quantum hall liquids; Shubnikov-de Haas; Magnetic fields; Quantum chemistry; Quantum Hall effect; article; chemical model; chemistry; computer simulation; electric conductivity; magnetic field; materials testing; methodology; oscillometry; quantum theory; radiation exposure; solution and solubility; Computer Simulation; Electric Conductivity; Magnetic Fields; Materials Testing; Models, Chemical; Oscillometry; Quantum Theory; Solutions
Type
journal article