Very weak bonds to artificial atoms formed by quantum corrals

doi:10.1126/science.abe2600

GSTDTAP > 气候变化

DOI	10.1126/science.abe2600
	Very weak bonds to artificial atoms formed by quantum corrals
	Fabian Stilp; Andreas Bereczuk; Julian Berwanger; Nadine Mundigl; Klaus Richter; Franz J. Giessibl
	2021-06-11
发表期刊	Science
出版年	2021
英文摘要	Chemical bonds generally form between electronic states of atoms; in principle, other electronic states could also form bonds. Stilp et al. found that the electronic states created within quantum corrals, large rings of iron atoms on a copper surface, can form chemical bonds with metal atoms on an atomic force microscope tip. The corral states form from many electrons but have a large spatial extent compared with an atomic orbital. The covalent bond to a 48-atom corral state had an energy of just 5 millielectron volts. Science , abe2600, this issue p. [1196][1] 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. [1]: /lookup/doi/10.1126/science.abe2600
领域	气候变化 ; 资源环境
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文献类型	期刊论文
条目标识符	http://119.78.100.173/C666/handle/2XK7JSWQ/329913
专题	气候变化资源环境科学
推荐引用方式 GB/T 7714	Fabian Stilp,Andreas Bereczuk,Julian Berwanger,et al. Very weak bonds to artificial atoms formed by quantum corrals[J]. Science,2021.
APA	Fabian Stilp,Andreas Bereczuk,Julian Berwanger,Nadine Mundigl,Klaus Richter,&Franz J. Giessibl.(2021).Very weak bonds to artificial atoms formed by quantum corrals.Science.
MLA	Fabian Stilp,et al."Very weak bonds to artificial atoms formed by quantum corrals".Science (2021).