2007/06/26 by J. S. Sheng, J S Sheng, Kai Chang · 8 citations
Chemistry · Physics and Astronomy · #Advanced Physical and Chemical Molecular Interactions #Electron #Exchange interaction #Ground state #Impurity #Magnetic field #Magnetic impurity #Mesoscopic physics #Quantum and electron transport phenomena #Spin (aerodynamics) #Topological Materials and Phenomena #Zeeman effect #cond-mat.mes-hall
paper · pdf · doi:10.1088/0953-8984/20/02/025222
published in Journal of Physics Condensed Matter 20(2), 025222 (IOP Publishing) · 8 pages, 11 figures
arxiv created 2007/06/26 · openalex publication_date 2007/12/13 · arxiv updated 2015/05/12 · openalex created_date 2016/06/24 · openalex updated_date 2026/08/05
Spin states and persistent currents are investigated theoretically in a mesoscopic ring with an embedded magnetic ion under a uniform magnetic field including the spin-orbit interactions. The magnetic impurity acts as a spin-dependent δ-potential for electrons and results in gaps in the energy spectrum, consequently suppresses the oscillation of the persistent currents. The competition between the Zeeman splittings and the s-d exchange interaction leads to a transition of the electron ground state in the ring. The interplay between the periodic potential induced by the Rashba and Dresselhaus spin-orbit interactions and the δ-potential induced by the magnetic impurity leads to significant variation in the energy spectrum, charge density distribution, and persistent currents of electrons in the ring.