Stilp, Fabian and Bereczuk, Andreas and Berwanger, Julian and Mundigl, Nadine and Richter, Klaus and Giessibl, Franz J. (2021) Very weak bonds to artificial atoms formed by quantum corrals. SCIENCE, 372 (6547). pp. 1196-1200. ISSN 0036-8075, 1095-9203
Full text not available from this repository. (Request a copy)Abstract
We explored the bonding properties of the quantum corral (a circle of 48 iron atoms placed on a copper surface) reported by Crommie et al. in 1993, along with variants, as an artificial atom using an atomic force microscope (AFM). The original corral geometry confines 102 electrons to 28 discrete energy states, and we found that these states can form a bond to the front atom of the AFM with an energy of about 5 millielectron volts. The measured forces are about 1/1000 of typical forces in atomically resolved AFM. The confined electrons showed covalent attraction to metal tips and Pauli repulsion to CO-terminated tips. The repulsion at close distance was evident from the response of corral states created by deliberately placing single iron atoms inside the corral. The forces scaled appropriately with a 24-atom corral.
| Item Type: | Article |
|---|---|
| Uncontrolled Keywords: | FORCE; MANIPULATION; WAVES |
| Subjects: | 500 Science > 530 Physics |
| Divisions: | Physics > Institute of Theroretical Physics > Chair Professor Richter > Group Klaus Richter Physics > Institute of Experimental and Applied Physics > Chair Professor Giessibl > Group Franz J. Giessibl |
| Depositing User: | Dr. Gernot Deinzer |
| Date Deposited: | 28 Jul 2022 06:18 |
| Last Modified: | 28 Jul 2022 06:18 |
| URI: | https://pred.uni-regensburg.de/id/eprint/45960 |
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