Probing Landau quantisation with the presence of insulator-quantum Hall transition in a GaAs two-dimensional electron system

Kuang Yao Chen; Y. H. Chang; C. -T. Liang; N. Aoki; Y. Ochiai; C. F. Huang; Li-Hung Lin; K. A. Cheng; H. H. Cheng; H. H. Lin; Jau-Yang Wu; Sheng-Di Lin

doi:10.1088/0953-8984/20/29/295223

Probing Landau quantisation with the presence of insulator-quantum Hall transition in a GaAs two-dimensional electron system

Mesoscale and Nanoscale Physics 2008-07-02 v1 Disordered Systems and Neural Networks

Authors: Kuang Yao Chen , Y. H. Chang , C. -T. Liang , N. Aoki , Y. Ochiai , C. F. Huang , Li-Hung Lin , K. A. Cheng , H. H. Cheng , H. H. Lin , Jau-Yang Wu , Sheng-Di Lin

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Abstract

Magneto-transport measurements are performed on the two-dimensional electron system (2DES) in an AlGaAs/GaAs heterostructure. By increasing the magnetic field perpendicular to the 2DES, magnetoresistivity oscillations due to Landau quantisation can be identified just near the direct insulator-quantum Hall (I-QH) transition. However, different mobilities are obtained from the oscillations and transition point. Our study shows that the direct I-QH transition does not always correspond to the onset of strong localisation.

Keywords

Landau quantisation insulator-quantum Hall transition two-dimensional electron system magneto-transport strong localisation

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@article{arxiv.0802.1378,
  title  = {Probing Landau quantisation with the presence of insulator-quantum Hall transition in a GaAs two-dimensional electron system},
  author = {Kuang Yao Chen and Y. H. Chang and C. -T. Liang and N. Aoki and Y. Ochiai and C. F. Huang and Li-Hung Lin and K. A. Cheng and H. H. Cheng and H. H. Lin and Jau-Yang Wu and Sheng-Di Lin},
  journal= {arXiv preprint arXiv:0802.1378},
  year   = {2008}
}

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11 pages, 7 figures

Probing Landau quantisation with the presence of insulator-quantum Hall transition in a GaAs two-dimensional electron system

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