Evidence of two disorder scales in Ga(AsBi)

Sebastian Imhof, Christian Wagner, Alexej Chernikov, Martin Koch, Kolja Kolata, Niko S. Köster, Sangam Chatterjee, Stephan W. Koch, Xiangfeng Lu, Shane Johnson, Daniel A. Beaton, Thomas Tiedje, Oleg Rubel, Angela Thränhardt

Research output: Contribution to journalArticlepeer-review

14 Scopus citations

Abstract

Temperature-dependent photoluminescence in a Ga(AsBi) structure is modelled in an excitonic hopping model and compared to experiment. It is shown that theory and experiment cannot be brought into agreement when using a single energy scale. Thus, a second energy scale is introduced, resulting in a good agreement between theory and experiment. The two scales are identified with spatially large alloy disorder and additional cluster states subdividing this first scale.

Original languageEnglish (US)
Pages (from-to)851-854
Number of pages4
JournalPhysica Status Solidi (B) Basic Research
Volume248
Issue number4
DOIs
StatePublished - Apr 2011

Keywords

  • Disorder
  • Ga(AsBi)
  • Hopping
  • Kinetic Monte-Carlo simulation
  • Semiconductors

ASJC Scopus subject areas

  • Electronic, Optical and Magnetic Materials
  • Condensed Matter Physics

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