Epitaxial growth of InP nanowires on germanium |
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Authors: | Bakkers Erik P A M van Dam Jorden A De Franceschi Silvano Kouwenhoven Leo P Kaiser Monja Verheijen Marcel Wondergem Harry van der Sluis Paul |
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Affiliation: | Philips Research Laboratories, Professor Holstlaan 4, 5656 AA Eindhoven, The Netherlands. erik.bakkers@philips.com |
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Abstract: | The growth of III-V semiconductors on silicon would allow the integration of their superior (opto-)electronic properties with silicon technology. But fundamental issues such as lattice and thermal expansion mismatch and the formation of antiphase domains have prevented the epitaxial integration of III-V with group IV semiconductors. Here we demonstrate the principle of epitaxial growth of III-V nanowires on a group IV substrate. We have grown InP nanowires on germanium substrates by a vapour-liquid-solid method. Although the crystal lattice mismatch is large (3.7%), the as-grown wires are monocrystalline and virtually free of dislocations. X-ray diffraction unambiguously demonstrates the heteroepitaxial growth of the nanowires. In addition, we show that a low-resistance electrical contact can be obtained between the wires and the substrate. |
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