The role of plasmons and interband transitions in the color of AuAl2 AuIn2 AuGa2
- American Institute of Physics
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- Journal Article
- Keast Vicki et al. 2011, 'The role of plasmons and interband transitions in the color of AuAl2 AuIn2 AuGa2', American Institute of Physics, vol. 99, no. 11, pp. 111908-1-111908-3.
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First principles calculations of the optical properties of the intermetallic compounds AuAl2, AuIn2, and AuGa2 have been performed. Analysis of the dielectric functions showed that AuAl2 is unique because a bulk plasmon is seen in the optical region and contributes to the purple color of this material. An experimental electron energy-loss spectrum showed excellent agreement with the theoretical prediction and confirmed the presence of the bulk plasmon.
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