Insulator, semiclassical oscillations and quantum Hall liquids at low magnetic fields

C F Huang; C-T Liang; E Comfort; G Bohra; G Strasser; J C Chen; J P Bird; Li-Hung Lin; M-G Kang; Shun-Tsung Lo

arxiv: 1209.2756 · v1 · pith:WD6SLVZEnew · submitted 2012-09-13 · ❄️ cond-mat.mes-hall · cond-mat.str-el

Insulator, semiclassical oscillations and quantum Hall liquids at low magnetic fields

Shun-Tsung Lo , Yi-Ting Wang , G Bohra , E Comfort , T-Y Lin , M-G Kang , G Strasser , J P Bird

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C F Huang Li-Hung Lin J C Chen C-T Liang

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classification ❄️ cond-mat.mes-hall cond-mat.str-el

keywords halloscillationsfieldsinsulatormagneticobservedquantumtransition

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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.

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Insulator, semiclassical oscillations and quantum Hall liquids at low magnetic fields

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