Many-particle resonances in excited states of semiconductor quantum dots

Details Many-particle resonances in excited states of semiconductor quantum dots Many-particle resonances in excited states of semiconductor quantum dots

2000-02-29

arxiv.org/abs/cond-mat/0002444v1

Physics

Condensed Matter

Strongly Correlated Electrons

9 pages, 6 ps figures

Scientific paper

10.1103/PhysRevB.62.4647

Anderson impurity model for semiconductor quantum dot is extended to take into account both particle and hole branches of charge excitations. It is shown that in dots with even number of electrons where the Kondo effect is absent in the ground state, novel midgap exciton states emerge in the energy spectrum due to Kondo-type shake-up processes. The relevance of the model to heterostructures doped by transition metal impurities and to rare earth ions adsorbed on metallic surfaces is discussed.

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