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https://scholarbank.nus.edu.sg/handle/10635/48804
DC Field | Value | |
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dc.title | SCANNING TUNNELING MICROSCOPY/SPECTROSCOPY STUDIES OF ULTRATHIN SB FILMS | |
dc.contributor.author | XU WENTAO | |
dc.date.accessioned | 2014-01-10T18:00:42Z | |
dc.date.available | 2014-01-10T18:00:42Z | |
dc.date.issued | 2013-08-16 | |
dc.identifier.citation | XU WENTAO (2013-08-16). SCANNING TUNNELING MICROSCOPY/SPECTROSCOPY STUDIES OF ULTRATHIN SB FILMS. ScholarBank@NUS Repository. | |
dc.identifier.uri | http://scholarbank.nus.edu.sg/handle/10635/48804 | |
dc.description.abstract | Antimony is a semimetal with unique topological surface states. Taking advantage of quantum size effect, Sb thin film can open a bulk gap. This thesis presents the studies of ultrathin Sb films by scanning tunneling microscopy/spectroscopy together with first-principles calculations. Self-assembled Sb nanostructures tend to form high islands because Sb source evaporates in the form of Sb4. By adding a cracking part to crack Sb4 into single atoms, ultrathin Sb films can be grown. Surface states on 30 BL Sb(111) are spin-polarized topological surface states without inter-surface coupling. However, for 9 BL Sb(111), inter-surface coupling is significant near the edge of surface Brillouin zone. For 4 BL Sb(111), the space inversion asymmetry induced by the substrate must be taken into account for the interpretation of the surface states. Sb (110) thin films are relaxed. They follow even-ML growth mode below 6 ML. This growth mode is supported by calculations. | |
dc.language.iso | en | |
dc.subject | scanning tunneling microscopy/spectroscopy, topological insulator, Sb(111), Sb(110), surface state, thin film | |
dc.type | Thesis | |
dc.contributor.department | PHYSICS | |
dc.contributor.supervisor | WANG XUESEN | |
dc.description.degree | Ph.D | |
dc.description.degreeconferred | DOCTOR OF PHILOSOPHY | |
dc.identifier.isiut | NOT_IN_WOS | |
Appears in Collections: | Ph.D Theses (Open) |
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XuWentao.pdf | 6.88 MB | Adobe PDF | OPEN | None | View/Download |
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