1972/03/01 by Zhen-Gang Zhu, Jamal Berakdar, F.I. Rakovich
Chemistry · Earth and Planetary Sciences · Physics and Astronomy · #Biotite #Charge (physics) #Chemistry #Chlorite #Ferrous #Flux (metallurgy) #Geochemistry #Geological and Geochemical Analysis #Geology #Magnetic flux #Magnetic flux quantum #Materials science #Metallurgy #Mineral #Mineralogy #Oscillation (cell signaling) #Persistent current #Picosecond #Precipitation #Quantum #Quantum and electron transport phenomena #Quartz #Radioactive element chemistry and processing #Semiconductor #Semiconductor Quantum Structures and Devices #Topological Materials and Phenomena #Uraninite #Uranium #cond-mat.mes-hall
paper · pdf · doi:10.1088/0953-8984/21/14/145801
published as J. Phys.: Condens. Matter 21 (2009) 145801 · 15pages, 5 figures
openalex publication_date 1972/03/01 · arxiv created 2009/02/11 · openalex created_date 2016/06/24 · openalex updated_date 2026/04/28
We investigate the non-equilibrium charge and spin-dependent currents in a quantum ring with a Rashba spin-orbit interaction (SOI) driven by two asymmetric picosecond electromagnetic pulses. The equilibrium persistent charge and persistent spin-dependent currents are investigated as well. It is shown that the dynamical charge and the dynamical spin-dependent currents vary smoothly with a static external magnetic flux and the SOI provides a SU(2) effective flux that changes the phases of the dynamic charge and the dynamic spin-dependent currents. The period of the oscillation of the total charge current with the delay time between the pulses is larger in a quantum ring with a larger radius. The parameters of the pulse fields control to a certain extent the total charge and the total spin-dependent currents. The calculations are applicable to nanometre rings fabricated in heterojunctions of III-V and II-VI semiconductors containing several hundreds of electrons.