Anomalous Coherent Bragg Rod Analysis Studies of GaAs/InGaAs

ORAL

Abstract

A considerable amount of work has been carried out recently in correlating growth conditions with electronically observed properties in Group III-V systems using a variety of characterization techniques. Ambiguity in interpretation of most characterization techniques arises due to difficulties in separating roughness effects from segregation and inter-diffusion of atomic species. We apply x-ray resonant techniques to the Coherent Bragg Rod Analysis (COBRA) phase retrieval procedure to produce high resolution electron density maps from bragg rod scans to determine with a high degree of accuracy, the relative concentrations of In and Ga in a system comprising of 1ML of GaAs on InGaAs.

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Authors

  • Divine Kumah

    • University of Michigan
    • Applied Physics Dept. University of Michigan

  • Naji Husseni

    • Department of Physics, University of Michigan, Ann Arbor, 48109
    • Applied Physics Dept. University of Michigan

  • Codrin Cionca

    • Applied Physics Dept. University of Michigan

  • Alex Riposan

    • Applied Physics Dept. University of Michigan

  • Joanna Mirecki Millunchick

    • Department of Materials Science and Engineering, University of Michigan

  • Phil Willmott

    • Swiss Light Source

  • Roy Clarke

    • University of Michigan, Physics Department
    • University of Michigan
    • Department of Physics, University of Michigan, Ann Arbor, 48109
    • Swiss Light Source

  • Yizhak Yacoby

    • Racah Institute of Physics, Hebrew University, Jerusalem, Israel, 91904
    • Racah Institute of Physics, Hebrew University