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Title: Evidence for graphite-like hexagonal AlN nanosheets epitaxially grown on single crystal Ag(111)

Ultrathin (sub-monolayer to 12 monolayers) AlN nanosheets are grown epitaxially by plasma assisted molecular beam epitaxy on Ag(111) single crystals. Electron diffraction and scanning tunneling microscopy provide evidence that AlN on Ag adopts a graphite-like hexagonal structure with a larger lattice constant compared to bulk-like wurtzite AlN. This claim is further supported by ultraviolet photoelectron spectroscopy indicating a reduced energy bandgap as expected for hexagonal AlN.
Authors:
; ; ; ; ; ;  [1] ; ;  [2] ;  [3] ; ;  [2]
  1. National Center for Scientific Research “Demokritos,” 15310 Athens (Greece)
  2. Laboratorio MDM, IMM-CNR, I-20864, Agrate Brianza (MB) (Italy)
  3. (Italy)
Publication Date:
OSTI Identifier:
22217762
Resource Type:
Journal Article
Resource Relation:
Journal Name: Applied Physics Letters; Journal Volume: 103; Journal Issue: 25; Other Information: (c) 2013 AIP Publishing LLC; Country of input: International Atomic Energy Agency (IAEA)
Country of Publication:
United States
Language:
English
Subject:
77 NANOSCIENCE AND NANOTECHNOLOGY; 36 MATERIALS SCIENCE; ALUMINIUM NITRIDES; ELECTRON DIFFRACTION; ENERGY GAP; FABRICATION; GRAPHITE; LATTICE PARAMETERS; LAYERS; MOLECULAR BEAM EPITAXY; MONOCRYSTALS; NANOSTRUCTURES; PHOTOELECTRON SPECTROSCOPY; PLASMA; SCANNING TUNNELING MICROSCOPY; SEMICONDUCTOR MATERIALS; ULTRAVIOLET RADIATION