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- Title
Charge Accumulation Layer on the n-GaN (0001) Surface with Ultrathin Ba Coatings.
- Authors
Benemanskaya, G. V.; Frank-Kamenetskaya, G. É.
- Abstract
The adsorption of Ba on the n-type GaN(0001) surface is studied. It is found that submonolayer Ba coatings induce cardinal changes in the electronic properties of the surface with the formation of a charge accumulation layer in the region of the near-surface band bending. The excitation of the Ba/n-GaN system by light from the region of GaN transparency results in photoemission. The lowest value of the work function corresponds to ∼1.90 eV at a Ba coverage of ∼0.4 ML. Two surface bands induced by Ba adsorption are found in the surface photoemission spectra. © 2005 Pleiades Publishing, Inc.
- Subjects
BARIUM; PHOTOEMISSION; ELECTRON emission; GALLIUM nitride; GALLIUM compounds; NITRIDES; THIN films
- Publication
JETP Letters, 2005, Vol 81, Issue 10, p519
- ISSN
0021-3640
- Publication type
Article
- DOI
10.1134/1.1996761