Formation of two-dimensional electron and hole gases in undoped AlxGa1-xAs/GaAs heterostructures

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13 Citations (Scopus)


Two-dimensional electron or hole gases (2DEG or 2DHG) are confined at the same interface in an undoped heterostructure by an electric field generated by a top gate. The combination of ion-implanted ohmic regions, an undoped heterostructure with superlattice barriers, and a metal gate is used to fabricate structures by a conventional process without self-alignment. High-quality 2DEG and 2DHG with a carrier density up to 8×1011 cm-2 are formed with a small gate leakage current. Switching between 2DEG and 2DHG at the same heterointerface is achieved by changing the sign of the gate voltage.

Original languageEnglish
Pages (from-to)588-590
Number of pages3
JournalJournal of Applied Physics
Issue number1
Publication statusPublished - 1996 Jul 1
Externally publishedYes

ASJC Scopus subject areas

  • Physics and Astronomy(all)


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