Theory of excitonic artificial atoms: InGaAs/GaAs quantum dots in strong magnetic fields

Shun-Jen Cheng, Weidong Sheng, Pawel Hawrylak

研究成果: Article

31 引文 斯高帕斯(Scopus)

摘要

We develop a theory of excitonic artificial atoms in strong magnetic fields. The excitonic atoms are formed by N electrons and holes confined in a quantum dot. The single-particle levels are described by the Fock-Darwin spectrum in a magnetic field. The magnetic field induces crossing of energy levels and allows us to engineer degenerate shells. We apply exact diagonalization techniques to calculate the magnetic-field evolution of the ground state of the N-electron-hole complex and its emission spectra. We focus on degenerate shells and show that excitons condense into correlated states due to hidden symmetry. We relate the Fock-Darwin spectrum, hidden symmetries, and direct and exchange interaction among particles to the emission spectra as a function of number of electron-hole pairs (excitation power) and magnetic field.

原文English
期刊Physical Review B - Condensed Matter and Materials Physics
68
發行號23
DOIs
出版狀態Published - 30 十二月 2003

指紋 深入研究「Theory of excitonic artificial atoms: InGaAs/GaAs quantum dots in strong magnetic fields」主題。共同形成了獨特的指紋。

  • 引用此