Quantum phases in artificial molecules
- 作者：Rontani ; Massimo ; Troiani ; Filippo ; Hohenester ; Ulrich ; Molinari ; Elisa
- 关键词：71.35.&minus ; y ; 71.45.Gm ; 73.23.&minus ; b ; 73.23.Hk ; A. Semiconductors ; A. Nanostructures ; D. Electron&ndash ; electron interactions
- 刊名：Solid State Communications
- 出版年：2001
- 期刊代码：101_00381098
- 类别：ms
- 出版时间：July 25, 2001
- 卷：119
- 期：4-5
- 页码：309-321
- 文件大小：361 K
摘要
The few-particle state of carriers confined in a quantum dot is controlled by the balance between their kinetic energy and their Coulomb correlation. In coupled quantum dots, both can be tuned by varying the inter-dot tunneling and interactions. Using a theoretical approach based on the diagonalization of the exact Hamiltonian, we show that the transitions between different quantum phases can be induced through the inter-dot coupling both for a system of few electrons (or holes) and for aggregates of electrons and holes. We discuss their manifestations, in addition energy spectra (accessible through capacitance or transport experiments) and optical spectra.