中国物理快报：英文版, 2015 (6), p.180-183
2015
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- Autor(en) / Beteiligte
- Titel
- Molecular Beam Epitaxy Growth and Scanning Tunneling Microscopy Study of Pyrite CuSe： Films on SrTiO3
- Ist Teil von
- 中国物理快报：英文版, 2015 (6), p.180-183
- Erscheinungsjahr
- 2015
- Quelle
- Alma/SFX Local Collection
- Beschreibungen/Notizen
- We perform molecular beam epitaxy growth and scanning tunneling microscopy study of copper diselenide （CuSe2 ） films on SrTiO3 （001）. Using a Se-rich condition, the single-phase pyrite CuSe2 grows in the Stranski-Krastanov （layer-plus-island） mode with a preferential orientation of （111）. Our careful inspection of both the as-grown and post-annealed CuSe2 films at various temperatures invariably shows a Cu-terminated surface, which, depending on the annealing temperature, reconstructs into two distinct structures 2 ×√3 and √x ×√3-R30°. The Cu termi- nation is supported by the depressed density of states near the Fermi level, measured by in-situ low temperature scanning tunneling spectroscopy. Our study helps understand the preparation and surface chemistry of transition metal pyrite dichalcogenides thin films.