Optimization of carbon incorporation in GaAs during molecular beam epitaxial growth |
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Authors: | H Nörenberg A Mazuelas K Hagenstein R Hey H T Grahn |
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Institution: | (1) Paul-Drude-Institut für Festkörperelektronik, Hausvogteiplatz 5-7, D-10117 Berlin, Germany;(2) Present address: Department of Materials, University of Oxford, Parks Road, OX1 3PH Oxford, UK |
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Abstract: | Carbon-doped GaAs with dopant concentrations up to about 1020 cm–3 has been grown by molecular beam epitaxy. Above a critical carbon concentration, which depends on the deposition parameters, the surface deteriorates and loses its mirror-like appearance. From X-ray diffractometry and scanning electron microscopy, a diagram is established separating two areas with rough and mirror-like surface morphologies. The electrical properties as well as the morphology of GaAs : C can be simultaneously improved by a careful adjustment of the deposition parameters according to this diagram.
On leave at: Tokyo Institute of Technology, Research Center for Quantum Effect Electronics, 2-12-1 O-okayama, Meguro-ku, Tokyo 152, Japan |
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Keywords: | 68 55 Bg 64 75 + g 73 61 Ey |
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