Electron-Electron Correlations in Square-Well Quantum Dots : Direct Energy Minimization Approach
Electron-Electron Correlations in Square-Well Quantum Dots : Direct Energy Minimization Approach
复制标题
方阱量子点中的电子-电子相关性：直接能量最小化方法
DOI：
10.1166/jnn.2011.3924
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发表时间：
2011
期刊：
影响因子：
--
通讯作者：
K.Hirose
中科院分区：
文献类型：
--
作者：
H.Goto;K.Hirose
使用直接能量最小化方案研究二维方阱量子点中的电子-电子相关性。通过改变点的大小和电子的数量来搜索基态电荷和自旋构型。对于双电子系统，计算相关能量和不计算相关能量的构型之间存在显着差异。描述了由动能和库仑相互作用能之间的相互作用产生的维格纳分子状结构的出现和熔化。计算电子-电子关联能和加成能谱，提取与方阱特殊效应相关的特殊电子数。
Electron–electron correlations in two-dimensional square-well quantum dots are investigated using the direct energy minimization scheme. Searches for groundstate charges and spin configurations are performed with varying the sizes of dots and the number of electrons. For a two-electron system, a standout difference between the configurations with and without counting correlation energy is demonstrated. The emergence and melting of Wigner-molecule-like structures arising from the interplay between the kinetic energy and Coulombic interaction energy are described. Electron–electron correlation energies and addition energy spectra are calculated, and special electron numbers related to peculiar effects of the square well are extracted.