Orbital magnetic properties of quantum dots: the role of electron-electron interactions

Phys. Rev. B 69 075311 (2004). We study the magnetic orbital response of a system of N interacting electrons confined in a two-dimensional geometry and subjected to a perpendicular magnetic field in the finite temperature Hartree-Fock approximation. The electron-electron interaction is modelled by a...

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Bibliographic Details
Main Authors da Silva, L. G. G. V. Dias, Lewenkopf, Caio H, Studart, Nelson
Format Journal Article
LanguageEnglish
Published 22.09.2003
Subjects
Physics - Mesoscale and Nanoscale Physics
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Summary:Phys. Rev. B 69 075311 (2004). We study the magnetic orbital response of a system of N interacting electrons confined in a two-dimensional geometry and subjected to a perpendicular magnetic field in the finite temperature Hartree-Fock approximation. The electron-electron interaction is modelled by a short-range Yukawa-type potential. We calculate the ground state energy, magnetization, and magnetic susceptibility as a function of the temperature, the potential range, and the magnetic field. We show that the amplitude and period of oscillations in the magnetic susceptibility are strongly affected by the electron-electron interaction as evidenced in experimental results. The zero-field susceptibility displays both paramagnetic and diamagnetic phases as a function of temperature and the number of confined electrons.
DOI:10.48550/arxiv.cond-mat/0309500