Graf, Herbert and Vancea, J. and Hoffmann, H. (2002) Single-electron tunneling at room temperature in cobalt nanoparticles. APPLIED PHYSICS LETTERS, 80 (7). pp. 1264-1266. ISSN 0003-6951
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We report on the observation of the Coulomb blockade with Coulomb staircases at room temperature in cobalt nanoparticles, with sizes ranging between 1 and 4 nm. A monolayer of these particles is supported by a thin 1-2 nm thick Al2O3 film, deposited on a smooth Au(111) surface. The local electrical transport on isolated Co clusters was investigated with a scanning tunneling microscope (STM). The tunnel contact of the STM tip allowed us to observe single-electron tunneling in the double barrier system STM-tip/Co/Al2O3/Au. Very high values of the Coulomb blockade of up to 1.0 V were reproducibly measured at room temperature on different particles with this setup. The current-voltage characteristics fit well by simulations based on the orthodox theory of single-electron tunneling. (C) 2002 American Institute of Physics.
| Item Type: | Article |
|---|---|
| Uncontrolled Keywords: | JUNCTIONS; |
| Subjects: | 500 Science > 530 Physics |
| Divisions: | Physics > Institute of Experimental and Applied Physics |
| Depositing User: | Dr. Gernot Deinzer |
| Date Deposited: | 09 Nov 2021 09:12 |
| Last Modified: | 09 Nov 2021 09:12 |
| URI: | https://pred.uni-regensburg.de/id/eprint/40586 |
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