2010/12/22 by Marian Nita, M. Niţă, D. C. Marinescu +3 · 15 citations
Physics and Astronomy · #Adiabatic process #Asymmetry #Atomic physics #Charge (physics) #Condensed matter physics #Current (fluid) #Dephasing #Electron #Mechanical and Optical Resonators #Momentum (technical analysis) #Physics #Quantum and electron transport phenomena #Quantum mechanics #Semiconductor Quantum Structures and Devices #Spin (aerodynamics) #Spin–orbit interaction #cond-mat.mes-hall
paper · pdf · doi:10.1103/physrevb.83.155427
published in Physical Review B 83(15) (American Physical Society) · 8 pages, 5 figures
arxiv created 2010/12/22 · openalex publication_date 2011/04/18 · arxiv updated 2015/05/20 · openalex created_date 2016/06/24 · openalex updated_date 2026/08/05
We demonstrate the theoretical possibility of obtaining a pure spin current in a 1D ring with spin-orbit interaction by irradiation with a nonadiabatic, two-component terahertz laser pulse, whose spatial asymmetry is reflected by an internal phase difference \ensuremathφ. The solutions of the equation of motion for the density operator are obtained for a spin-orbit coupling linear in the electron momentum (Rashba) and they are used to calculate the time-dependent charge and spin currents. We find that there are critical values of \ensuremathφ at which the charge current disappears, while the spin current reaches a maximum or a minimum value.