標題: Theory of excitonic artificial atoms: InGaAs/GaAs quantum dots in strong magnetic fields
作者: Cheng, SJ
Sheng, WD
Hawrylak, P
電子物理學系
Department of Electrophysics
公開日期: 1-Dec-2003
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.
URI: http://dx.doi.org/10.1103/PhysRevB.68.235330
http://hdl.handle.net/11536/27336
ISSN: 2469-9950
DOI: 10.1103/PhysRevB.68.235330
期刊: PHYSICAL REVIEW B
Volume: 68
Issue: 23
起始頁: 0
結束頁: 0
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