Quantum Monte-Carlo Study of Electron Correlation in Heterostructure Quantum Dots

Chou, Mei-Yin

Georgia Tech Research Corporation, Atlanta, GA

关键词: Nanostructures;    Quantum Wells;    36 Materials Science;    Quantum Monte Carlo Methods;    Electron-Electron Interactions;   

DOI  :  10.2172/894945
RP-ID  :  DOE/ER/45930-4
RP-ID  :  FG02-01ER45930
RP-ID  :  894945

美国|英语

来源: UNT Digital Library

【 摘 要 】

The goal of this project is to study electron correlation in a confined geometry (quantum dots) within the two-dimensional quantum well in the sandwiches of two semiconductor materials. For these systems one is able to tune the electronic properties by controlling the size and the electron number, creating tremendous potential for novel applications. Much effort in this emerging field has been devoted to producing entangled states that are required for quantum information processing. At the same time, new physical phenomena have emerged from these artificial structures. Adding electrons to a quantum dot is more complicated than filling up discrete energy levels due to electron correlation. Therefore, our project is focusing on employing the state-of-the-art quantum Monte Carlo methods to study the electron-electron interaction. A close examination of the breakdown of Hund's rules and electron localization has been conducted in our simulations. The results are summarized in this report.