Probing onset of strong localization and electron-electron interactions with the presence of direct insulator-quantum Hall transition

Details Probing onset of strong localization and electron-electron interactions with the presence of direct insulator-quantum Hall transition Probing onset of strong localization and electron-electron interactions with the presence of direct insulator-quantum Hall transition

2010-04-29

arxiv.org/abs/1004.5315v1

Physics

Condensed Matter

Mesoscale and Nanoscale Physics

9 pages, 4 figures

Scientific paper

We have performed low-temperature transport measurements on a disordered two-dimensional electron system (2DES). Features of the strong localization leading to the quantum Hall effect are observed after the 2DES undergoes a direct insulator-quantum Hall transition with increasing the perpendicular magnetic field. However, such a transition does not correspond to the onset of strong localization. The temperature dependences of the Hall resistivity and Hall conductivity reveal the importance of the electron-electron interaction effects to the observed transition in our study.

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