Stability and Surface Reconstruction of Topological Insulator Bi2Se3 on Exposure to Atmosphere
The stability of the surface of vacuum-cleaved topological insulator Bi2Se3 single crystals is investigated with high-resolution synchrotron-based photoelectron spectroscopy. While the surface is stable at room temperature in vacuum, a Bi2 layer always forms at the surface of Bi2Se3 upon even brief...
| Main Authors: | , , , , , , , , , |
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| Format: | Journal Article |
| Published: |
American Chemical Society
2014
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| Online Access: | http://hdl.handle.net/20.500.11937/27890 |
| _version_ | 1848752389631246336 |
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| author | Edmonds, M. Hellerstedt, J. Tadich, A. Schenk, A. O'Donnell, Kane Tosado, J. Butch, N. Syers, P. Paglione, J. Fuhrer, M. |
| author_facet | Edmonds, M. Hellerstedt, J. Tadich, A. Schenk, A. O'Donnell, Kane Tosado, J. Butch, N. Syers, P. Paglione, J. Fuhrer, M. |
| author_sort | Edmonds, M. |
| building | Curtin Institutional Repository |
| collection | Online Access |
| description | The stability of the surface of vacuum-cleaved topological insulator Bi2Se3 single crystals is investigated with high-resolution synchrotron-based photoelectron spectroscopy. While the surface is stable at room temperature in vacuum, a Bi2 layer always forms at the surface of Bi2Se3 upon even brief (5 min) exposure to atmosphere. This is accompanied by a depletion of selenium in the near surface region and a 1.4 eV decrease in work function. The Bi2 surface is found to be stable upon return to ultrahigh vacuum conditions but is unstable with prolonged exposure to air, ultimately resulting in two possible different reconstructed surfaces, explaining previous contradictory results on long-term atmosphere exposure of Bi2Se3. |
| first_indexed | 2025-11-14T08:07:51Z |
| format | Journal Article |
| id | curtin-20.500.11937-27890 |
| institution | Curtin University Malaysia |
| institution_category | Local University |
| last_indexed | 2025-11-14T08:07:51Z |
| publishDate | 2014 |
| publisher | American Chemical Society |
| recordtype | eprints |
| repository_type | Digital Repository |
| spelling | curtin-20.500.11937-278902017-09-13T15:11:56Z Stability and Surface Reconstruction of Topological Insulator Bi2Se3 on Exposure to Atmosphere Edmonds, M. Hellerstedt, J. Tadich, A. Schenk, A. O'Donnell, Kane Tosado, J. Butch, N. Syers, P. Paglione, J. Fuhrer, M. The stability of the surface of vacuum-cleaved topological insulator Bi2Se3 single crystals is investigated with high-resolution synchrotron-based photoelectron spectroscopy. While the surface is stable at room temperature in vacuum, a Bi2 layer always forms at the surface of Bi2Se3 upon even brief (5 min) exposure to atmosphere. This is accompanied by a depletion of selenium in the near surface region and a 1.4 eV decrease in work function. The Bi2 surface is found to be stable upon return to ultrahigh vacuum conditions but is unstable with prolonged exposure to air, ultimately resulting in two possible different reconstructed surfaces, explaining previous contradictory results on long-term atmosphere exposure of Bi2Se3. 2014 Journal Article http://hdl.handle.net/20.500.11937/27890 10.1021/jp506089b American Chemical Society restricted |
| spellingShingle | Edmonds, M. Hellerstedt, J. Tadich, A. Schenk, A. O'Donnell, Kane Tosado, J. Butch, N. Syers, P. Paglione, J. Fuhrer, M. Stability and Surface Reconstruction of Topological Insulator Bi2Se3 on Exposure to Atmosphere |
| title | Stability and Surface Reconstruction of Topological Insulator Bi2Se3 on Exposure to Atmosphere |
| title_full | Stability and Surface Reconstruction of Topological Insulator Bi2Se3 on Exposure to Atmosphere |
| title_fullStr | Stability and Surface Reconstruction of Topological Insulator Bi2Se3 on Exposure to Atmosphere |
| title_full_unstemmed | Stability and Surface Reconstruction of Topological Insulator Bi2Se3 on Exposure to Atmosphere |
| title_short | Stability and Surface Reconstruction of Topological Insulator Bi2Se3 on Exposure to Atmosphere |
| title_sort | stability and surface reconstruction of topological insulator bi2se3 on exposure to atmosphere |
| url | http://hdl.handle.net/20.500.11937/27890 |