| Download | - View final version: Scanning tunneling spectroscopy reveals a silicon dangling bond charge state transition (PDF, 1005 KiB)
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| DOI | Resolve DOI: https://doi.org/10.1088/1367-2630/17/7/073023 |
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| Author | Search for: Labidi, Hatem1; Search for: Taucer, Marco; Search for: Rashidi, Mohammad1; Search for: Koleini, Mohammad1; Search for: Livadaru, Lucian; Search for: Pitters, Jason1; Search for: Cloutier, Martin1; Search for: Salomons, Mark1; Search for: Wolkow, Robert A.1 |
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| Name affiliation | - National Research Council of Canada. National Institute for Nanotechnology
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| Format | Text, Article |
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| Subject | STM, scanning tunneling spectroscopy, silicon dangling bond, charge state transition, silicon atomic quantum dot |
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| Abstract | We report the study of single dangling bonds (DBs) on a hydrogen-terminated silicon (100) surface using a low-temperature scanning tunneling microscope. By investigating samples prepared with different annealing temperatures, we establish the critical role of subsurface arsenic dopants on the DB electronic properties. We show that when the near-surface concentration of dopants is depleted as a result of 1250 °Cflash anneals, a single DB exhibits a sharp conduction step in its I(V) spectroscopy that is not due to a density of states effect but rather corresponds to a DB charge state transition. The voltage position of this transition is perfectly correlated with bias-dependent changes in the STM images of the DB at different charge states. Density functional theory calculations further highlight the role of subsurface dopants on DB properties by showing the influence of the DB-dopant distance on the DB state. We discuss possible theoretical models of electronic transport through the DB that could account for our experimental observations. |
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| In | |
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| Language | English |
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| Peer reviewed | Yes |
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| NPARC number | 21276129 |
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| Export citation | Export as RIS |
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| Report a correction | Report a correction (opens in a new tab) |
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| Record identifier | 91489134-57e6-406a-8e37-3daf84adbedd |
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| Record created | 2015-09-25 |
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| Record modified | 2020-06-02 |
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