Journal of Vacuum Science & Technology B Microelectronics and Nanometer Structures Processing Measurement and Phenomena · 1998 · 244 citations · 15 references
Natural SciencesMaterials EngineeringMaterials ScienceMaterials PhysicsSpectroscopySurface ScienceAuger Electron SpectroscopyElectron DiffractionScanning Probe MicroscopySurface CharacterizationSurface PhysicsSurface ReconstructionElectron Diffraction Of SurfacesFirst-principles ModelingGallium Nitride (Gan) MaterialsMetallic CharacterScanning Auger MicroscopyScanning Electron MicroscopySurface Electronic StructureValence Electrons
Reconstructions of GaN(0001) and (0001̄) surfaces are studied by scanning tunneling microscopy and spectroscopy, by electron diffraction, by Auger electron spectroscopy, and using first-principles theory. Attention is focused on Ga-rich reconstructions for each surface, which are found to have a metallic character involving significant overlap between Ga valence electrons. The electron counting rule is thus violated for these surfaces, but they nonetheless form minimum energy structures.
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