Optical emission from<mml:math xmlns:mml="http://www.w3.org/1998/Math/MathML"><mml:mrow><mml:mi>Si</mml:mi><mml:msub><mml:mi mathvariant="normal">O</mml:mi><mml:mn>2</mml:mn></mml:msub></mml:mrow></mml:math>-embedded silicon nanocrystals: A high-pressure Raman and photoluminescence study
Physical review. B, Condensed matter and materials physics