Highly tensile-strained Ge/InAlAs nanocomposites.

作者: Daehwan Jung , Joseph Faucher , Samik Mukherjee , Austin Akey , Daniel J. Ironside

DOI: 10.1038/NCOMMS14204

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摘要: Self-assembled nanocomposites have been extensively investigated due to the novel properties that can emerge when multiple material phases are combined. Growth of epitaxial using lattice-mismatched constituents also enables strain-engineering, which be used further enhance properties. Here, we report self-assembled growth highly tensile-strained Ge/In0.52Al0.48As (InAlAs) by spontaneous phase separation. Transmission electron microscopy shows a high density single-crystalline germanium nanostructures coherently embedded in InAlAs without extended defects, and Raman spectroscopy reveals 3.8% biaxial tensile strain nanostructures. We show tuned 5.3% altering lattice constant matrix material, illustrating versatility for engineering. Photoluminescence electroluminescence results then discussed illustrate potential realizing devices based on this nanocomposite material.

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