@ARTICLE{Scarpulla2008-cu,
  title     = "Near-infrared absorption and semimetal-semiconductor transition
               in 2nm {ErAs} nanoparticles embedded in {GaAs} and {AlAs}",
  author    = "Scarpulla, Michael A and Zide, Joshua M O and LeBeau, James M
               and Van de Walle, Chris G and Gossard, Arthur C and Delaney,
               Kris T",
  abstract  = "We report strong near-infrared absorption peaks in epitaxial
               films of GaAs and AlAs containing approximately 0.5?5\% of the
               semimetal ErAs. The energy of the resonant absorption peak can
               be changed from 0.62to1.0eV (2.2?1.4?m) by variation of the ErAs
               volume fraction and the substrate temperature. We interpret the
               infrared absorption in terms of transitions across an energy gap
               caused by a confinement-induced semimetal-semiconductor
               transition. An effective mass model relates the changes in
               nanoparticle diameter observed in transmission electron
               microscopy to the energy gap.",
  journal   = "Appl. Phys. Lett.",
  publisher = "American Institute of Physics",
  volume    =  92,
  number    =  17,
  pages     = "173116",
  month     =  apr,
  year      =  2008,
  keywords  = "magnetotransport;LeBeau;HfO2",
  language  = "English",
  issn      = "0003-6951",
  doi       = "10.1063/1.2908213"
}

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