2007/01/18 by R. Citro, F. Romeo, Francesco Romeo · 1 citation
Engineering · Physics and Astronomy · #Advancements in Semiconductor Devices and Circuit Design #Charge (physics) #Condensed matter physics #Coupling (piping) #Ferromagnetism #Materials science #Mesoscopic physics #Molecular wire #Physics #Quantum and electron transport phenomena #Quantum mechanics #Spin (aerodynamics) #Spintronics #Spin–orbit interaction #Topological Materials and Phenomena #cond-mat.mes-hall
paper · pdf · doi:10.1103/physrevb.75.073306
published as Phys.Rev.B, 75, 073306 (2007) · 6 pages, 5 figures, to appear in PRB
arxiv created 2007/01/18 · openalex publication_date 2007/02/26 · arxiv updated 2009/12/01 · openalex created_date 2025/10/10 · openalex updated_date 2026/08/05
We analyze the effect of Rashba spin-orbit coupling and of a local tunnel barrier on the persistent spin and charge currents in a one-dimensional conducting Aharonov-Bohm ring symmetrically coupled to two leads. First, as an important consequence of the spin splitting, it is found that a persistent spin current can be induced, which is not simply proportional to the charge current. Second, a magnification effect of the persistent spin current is shown when one tunes the Fermi energy near the Fano-type antiresonances of the total transmission coefficient governed by the tunnel barrier strength. As an unambiguous signature of spin-orbit coupling, we also show the possibility to produce a persistent pure spin current at the interference zeros of the transmittance. This widens the possibilities of employing mesoscopic conducting rings in phase-coherent spintronics applications.