An Exchange-Coupled Donor Molecule in Silicon
An Exchange-Coupled Donor Molecule in Silicon
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DOI：
10.1021/nl5023942
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发表时间：
2014-10-01
期刊：
影响因子：
10.8
通讯作者：
Ferguson, Andrew J.
中科院分区：
文献类型：
--
作者：
Gonzalez-Zalba, M. F.;Saraiva, Andre;Ferguson, Andrew J.
我们提出了一个相结合的实验和理论演示的能谱和交换耦合的硅纳米晶体管中的隔离施主对。原子轨道的分子杂化导致单电子和双电子结合能和充电能相对于单施主情况的增强，这是量子电子器件的理想特征。我们的氢分子模型的基础上的多路中央电池校正的有效质量理论，结合了完整的配置相互作用处理的2-电子光谱匹配的测量数据的砷双原子分子与原子间距离R = 2.3 +/- 0.5 nm。
We present a combined experimental-theoretical demonstration of the energy spectrum and exchange coupling of an isolated donor pair in a silicon nanotransistor. The molecular hybridization of the atomic orbitals leads to an enhancement of the one- and two-electron binding energies and charging energy with respect to the single donor case, a desirable feature for quantum electronic devices. Our hydrogen molecule-like model based on a multivalley central-cell corrected effective mass theory incorporating a full configuration interaction treatment of the 2-electron spectrum matches the measured data for an arsenic diatomic molecule with interatomic distance R = 2.3 +/- 0.5 nm.