Vertically coupled quantum dots in the local spin-density functional theory
Vertically coupled quantum dots in the local spin-density functional theory
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局域自旋密度泛函理论中的垂直耦合量子点
DOI：
10.1103/physrevb.63.115316
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发表时间：
2001
影响因子：
3.7
通讯作者：
F. Garcías
中科院分区：
文献类型：
--
作者：
M. Pi;A. Emperador;M. Barranco;F. Garcías
利用局域自旋密度泛函理论研究了零磁场下垂直耦合双量子点的结构。这些点是相同的，并且具有有限的宽度，并且整个系统是轴对称的。我们首先讨论了厚度对单点加和光谱的影响。接下来，我们描述了耦合点的结构作为不同电子数的点间距离的函数。此外，光谱，洪德规则，和分子类型的配置进行了讨论。结果表明，自相互作用修正的密度泛函的结果并没有起到非常重要的作用，在计算的加成谱。
We have investigated the structure of double quantum dots vertically coupled at zero magnetic field within local-spin-density functional theory. The dots are identical and have a finite width, and the whole system is axially symmetric. We first discuss the effect of thickness on the addition spectrum of one single dot. Next we describe the structure of coupled dots as a function of the interdot distance for different electron numbers. Addition spectra, Hund’s rule, and molecular-type configurations are discussed. It is shown that self-interaction corrections to the density-functional results do not play a very important role in the calculated addition spectra.