Metal-insulator oscillations in a two-dimensional electron-hole system

Robin J Nicholas, Kei Takashina, Mohammed Lakrimi, Beata Kardynal, Songwon Khym, Nigel J Mason, David M Symons, Duncan K Maude, Jean Claude Portal

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22 Citations (Scopus)

Abstract

The electrical transport properties of a bipolar InAs/GaSb system have been studied in a magnetic field. The resistivity oscillates between insulating and metallic behavior while the quantum Hall effect shows a digital character oscillating from 0 to 1 conductance quantum e2/h. The insulating behavior is attributed to the formation of a total energy gap in the system. A novel looped edge state picture is proposed associated with the appearance of a voltage between Hall probes which is symmetric on magnetic field reversal.
Original languageEnglish
Pages (from-to)2364-2367
JournalPhysical Review Letters
Volume85
Issue number11
DOIs
Publication statusPublished - 11 Sep 2000

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    Nicholas, R. J., Takashina, K., Lakrimi, M., Kardynal, B., Khym, S., Mason, N. J., Symons, D. M., Maude, D. K., & Portal, J. C. (2000). Metal-insulator oscillations in a two-dimensional electron-hole system. Physical Review Letters, 85(11), 2364-2367. https://doi.org/10.1103/PhysRevLett.85.2364