Magnetic semiconductor artificial atom with many particles: Thomas-Fermi model and ferromagnetic phases

Details Magnetic semiconductor artificial atom with many particles: Thomas-Fermi model and ferromagnetic phases Magnetic semiconductor artificial atom with many particles: Thomas-Fermi model and ferromagnetic phases

2005-04-21

arxiv.org/abs/cond-mat/0504559v2

Physics

Condensed Matter

Mesoscale and Nanoscale Physics

13 pages, 5 figures, submitted to PRB

Scientific paper

Many-particle electron states in semiconductor quantum dots with carrier-mediated ferromagnetism are studied theoretically within the self-consistent Boltzmann equation formalism. Depending on the conditions, a quantum dot may contain there phases: partially spin-polarized ferromagnetic, fully spin-polarized ferromagnetic, and paramagnetic phases. The physical properties of many-body ferromagnetic confined systems come from the competing carrier-mediated ferromagnetic and Coulomb interactions. The magnetic phases in gated quantum dots with holes can be controlled by the voltage or via optical methods.

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