Affiliation: | 1. Institute of Solid State Physics, Chinese Academy of Sciences, Hefei 230031, China;Department of Physics, Yantai University, Yantai 264005, China 2. Department of Physics, Yantai University, Yantai 264005, China; CCAST World Laboratory, Beijing 100080, China 3. Institute of Solid State Physics, Chinese Academy of Sciences, Hefei 230031, China 4. Department of Physics, Yantai University, Yantai 264005, China |
Abstract: | We have calculated the ground-state energy of the symmetric quantum-dot pattern by the ab initio calculation method, i.e. unrestricted Hartree-Fock-Roothaan (UHFR) method based on the Gaussian basis, and studied their electric capacitance spectra, assuming each quantum dot of quantum-dot pattern to be confined in a three-dimensional spherical potential well of finite depth. For the systems in question, our results show that our method and theoretical model not only give the electric capacitance peaks similar to s-shell and p-shell atom-like quantum dot, but also show some new fine-structure of electric capacitance in the symmetric quantum-dot pattern system. This method might be a feasible tool to study few-electron problems on the symmetric quantum-dot pattern system. |