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Current issue   Ukr. J. Phys. 2014, Vol. 58, N 9, p.888-893

    Paper

Bauzha O.S.

Taras Shevchenko National University of Kyiv
(64, Volodymyrs’ka Str., Kyiv 01033, Ukraine; e-mail: asb@univ.kiev.ua)

Magnetic Properties of Quantum Rings in the Presence of Spin-Orbit and Electron-Electron Interactions

Section: Nanosystems
Original Author's Text: Ukrainian

Abstract: The separate and combined influences of the spin-orbit and electron-electron interactions on the electron magnetization in quantum rings have been studied theoretically on the basis of the spin-density-functional theory and the Kohn–Sham equation used for the calculation of electron states in two-dimensional parabolic quantum rings containing from two to six electrons. The magnetization of electrons in a quantum ring is calculated at zero temperature. The revealed abrupt changes in the ring magnetization are associated with the crossing of electron states that occurs if the spin-orbit and/or electron-electron interactions are taken into consideration.

Key words: Kohn–Sham, qubit, Hartree–Fock, Broyden, Rashba, quantum dots, spin-orbit splitting.