Spectroscopic Study of the Interface and Band Alignment at the GaInP(Partially Ordered)/GaAs Heterojunction under High Pressure and High Magnetic Field

  • P. Y. Yu
  • G. Martinez
  • J. Zeman
  • K. Uchida


The semiconducting alloy Ga0.5In0.5P grown epitaxially on a GaAs substrate forms a rather unique system in which not only the band gap is tunable by varying the degree of CuPt ordering in the Ga0.5In0.5P but also the band alignment can be varied from type Ito type II. The band alignment has been found to have an important influence on the optoelectronic properties of the Ga0.51n0.5P layer in terms of the efficiency of photoluminescence upconversion at the Ga0.5In0.5P /GaAs interface and the observation of quantum well emission from Ga0.5In0.5P/GaAs/-Ga0.5In0.5P structure. In this paper we shall demonstrate how the band offset and alignment in such heterostructures can be manipulated and measured with meV resolution by combining spectroscopic measurements with high pressure and high magnetic field. In addition, the magnetic length can be used as a “nanometer-stick” in probing the size of type II domains in samples where most of the interface is of type I except for tiny islands of more ordered domains.

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Copyright information

© Springer Science+Business Media New York 2002

Authors and Affiliations

  • P. Y. Yu
    • 1
    • 2
  • G. Martinez
    • 3
  • J. Zeman
    • 3
  • K. Uchida
    • 4
  1. 1.Department of PhysicsUniversity of CaliforniaBerkeleyUSA
  2. 2.Materials Science DivisionLawrence Berkeley National LaboratoryBerkeleyUSA
  3. 3.Grenoble High Magnetic Field Laboratory MPI/CNRSGrenoble Cedex 9France
  4. 4.Department of Electrical EngineeringThe University of Electro-CommunicationsTokyo 182Japan

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