Electronic Charge and Spin Density Distribution in a Quantum Ring with Spin-Orbit and Coulomb InteractionsPhysical Review B
PublisherThe American Physical Society
AbstractCharge and spin density distributions are studied within a nanoring structure endowed with Rashba and Dresselhaus spin-orbit interactions (SOIs). For a small number of electrons, in the presence of an external magnetic ﬁeld and of the Coulomb interaction, the energy spectrum of the system is calculated through an exact numerical diagonalization procedure. The eigenstates thus determined are used to estimate the charge and spin densities around the ring. We ﬁnd that when more than two electrons are considered, the charge density deformations induced by SOIs are dramatically ﬂattened by the Coulomb repulsion, while the spin density deformations are ampliﬁed.
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