Addition Spectra of Quantum Dots: the Role of Dielectric Mismatch
Addition Spectra of Quantum Dots: the Role of Dielectric Mismatch
复制标题
DOI：
10.1021/jp0000026
复制
发表时间：
1999-08
影响因子：
3.3
通讯作者：
A. Franceschetti;A. Williamson;A. Zunger
中科院分区：
文献类型：
--
作者：
A. Franceschetti;A. Williamson;A. Zunger
利用原子赝势波函数，计算了InAs量子点的电子和空穴加成能以及准粒子能隙。我们发现，相加能和准粒子能隙强烈地依赖于周围材料的介电常数Eout，并且当Eout远小于点的介电常数时，电子−电子与空穴−空穴的相互作用主要受表面极化效应的影响。我们预测了添加能和准粒子能隙作为尺寸和Eout的函数，并将我们的结果与最近的单点隧道光谱实验进行了比较。
Using atomistic pseudopotential wave functions, we calculate the electron and hole addition energies and the quasi-particle gap of InAs quantum dots. We find that the addition energies and the quasi-particle gap depend strongly on the dielectric constant eout of the surrounding material, and that when eout is much smaller than the dielectric constant of the dot the electron−electron and hole−hole interactions are dominated by surface polarization effects. We predict the addition energies and the quasi-particle gap as a function of size and eout, and compare our results with recent single-dot tunneling spectroscopy experiments.