Buried Metal/III–V Semiconductor Heteroepitaxy: Approaches to Lattice Matching
Tóm tắt
Metallic transition metal aluminides and gallides with the CsCl structure and semi-metallic rare earth monopnictides with the NaCl structure have been grown as buried conducting layers in III-V compound semiconductor heterostructures. The criteria for achieving (100) oriented epitaxial growth on (100)III-V semiconductor surfaces is different for each class of materials. The methods used to achieve III-V/metal/llI-V heteroepitaxial structures are discussed here with emphasis on the different approaches needed for the aluminides or gallides and the monopnictides. Work producing exact lattice matching between the buried metal and surrounding semiconductor layers makes possible the separation of lattice mismatch effects from those due to other interface parameters. Results to date indicate that defect structures in the overgrown semiconductor layers arise more because of differences in crystal symmetry, interface chemistry and bonding across the interface than lattice mismatch.
Tài liệu tham khảo
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