2000/05/03 by S. Viefers, P. Singha Deo, S. M. Reimann +2 · 1 citation
Engineering · Physics and Astronomy · #Molecular Junctions and Nanostructures #Quantum and electron transport phenomena #Semiconductor Quantum Structures and Devices #cond-mat.mes-hall
paper · pdf · doi:10.1103/physrevb.62.10668
7 pages REVTeX, including 8 postscript figures
arxiv created 2000/05/03 · openalex publication_date 2000/10/15 · arxiv updated 2009/11/30 · openalex created_date 2025/10/10 · openalex updated_date 2026/07/28
We present a numerical study of persistent currents in quantum rings using current-spin-density-functional theory (CSDFT). This formalism allows for a systematic study of the joint effects of spin, interactions and impurities for realistic systems. It is illustrated that CSDFT is suitable for describing the physical effects related to Aharonov-Bohm phases by comparing energy spectra of impurity-free rings to existing exact diagonalization and experimental results. Further, we examine the effects of a symmetry-breaking impurity potential on the density and current characteristics of the system and propose that narrowing the confining potential at fixed impurity potential will suppress the persistent current in a characteristic way.