Energy levels and far-infrared spectroscopy for two electrons in a semiconductor nanoring

Abstract

The effects of electron-electron interaction of a two-electron nanoring on the energy levels and far-infrared (FIR) spectroscopy have been investigated based on a model calculation which is performed within the exactly numerical diagonalization. It is found that the interaction changes the energy spectra dramatically, and also shows significant influence on the FIR spectroscopy. The crossings between the lowest spin-singlet and triplet states induced by the coulomb interaction are clearly revealed. Our results are related to the experiment recently carried out by A. Lorke et al. [Phys. Rev. Lett. 84, 2223 (2000)].

17 pages, 6 figures, revised and accepted by Phys. Rev. B (Dec. 15)

References in corpus (3)

• Spectroscopy of nanoscopic semiconductor rings
• Influence of shape of quantum dots on their far-infrared absorption
• Spin and density longitudinal response of quantum dots in time-dependent local-spin-density approximation

Cited by in corpus (6)

• Electron localization and optical absorption of polygonal quantum rings
• Spin entanglement induced by spin-orbit interactions in coupled quantum dots
• Multi-domain electromagnetic absorption of triangular quantum rings
• Magnetic field control of the intraband optical absorption in two-dimensional quantum rings
• Controlled Operations in a Strongly Correlated Two-Electron Quantum Ring
• Symmetry dependent electron localization and optical absorption of polygonal quantum rings