title: Insulator, semiclassical oscillations and quantum Hall liquids at low magnetic fields.
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.
authors.affiliation: Graduate Institute of Applied Physics, National Taiwan University, Taipei 106, Taiwan.
authors.forename: Shun-Tsung
authors.initials: ST
authors.lastname: Lo
authors.forename: Yi-Ting
authors.initials: YT
authors.lastname: Wang
authors.forename: G
authors.initials: G
authors.lastname: Bohra
authors.forename: E
authors.initials: E
authors.lastname: Comfort
authors.forename: T-Y
authors.initials: TY
authors.lastname: Lin
authors.forename: M-G
authors.initials: MG
authors.lastname: Kang
authors.forename: G
authors.initials: G
authors.lastname: Strasser
authors.forename: J P
authors.initials: JP
authors.lastname: Bird
authors.forename: C F
authors.initials: CF
authors.lastname: Huang
authors.forename: Li-Hung
authors.initials: LH
authors.lastname: Lin
authors.forename: J C
authors.initials: JC
authors.lastname: Chen
authors.forename: C-T
authors.initials: CT
authors.lastname: Liang
mesh_terms: D003198:Computer Simulation; D004553:Electric Conductivity; D060526:Magnetic Fields; D008422:Materials Testing; D008956:Models, Chemical; D009991:Oscillometry / Q000379:methods*; D011789:Quantum Theory; D012996:Solutions / Q000737:chemistry* / Q000528:radiation effects*
chemical_list: D012996:Solutions