Study of the electric capacitance spectra on symmetric quantum-dot pattern  

作　　者：戴振宏 孙金祚 张立德 隋鹏飞 黄士勇 卢卯旺 

机构地区：[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

出　　处：《Science China(Physics,Mechanics & Astronomy)》2003年第3期300-306,共7页中国科学：物理学、力学、天文学（英文版）

基　　金：the National Natural Seience Foundation of China(Grant No10074064);Youth Foundarion of Yantai Universiry(Grant No WL02Z7)

摘　　要：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.We have calculated the ground-state energy of the symmetric quantum-dot pattern by theab 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.

关 键 词：quantum-dot pattern UHFR many-electron states 

分 类 号：O471.1[理学—半导体物理]