Physics – Condensed Matter – Mesoscale and Nanoscale Physics
Scientific paper
2009-02-11
J. Phys.: Condens. Matter 21 (2009) 145801
Physics
Condensed Matter
Mesoscale and Nanoscale Physics
15pages, 5 figures
Scientific paper
10.1088/0953-8984/21/14/145801
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 nano-meter rings fabricated in heterojuctions of III-V and II-VI semiconductors containing several hundreds electrons.
Berakdar Jamal
Zhu Zhen-Gang
No associations
LandOfFree
Electromagnetic Pulse Driven Spin-dependent Currents in Semiconductor Quantum Rings does not yet have a rating. At this time, there are no reviews or comments for this scientific paper.
If you have personal experience with Electromagnetic Pulse Driven Spin-dependent Currents in Semiconductor Quantum Rings, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Electromagnetic Pulse Driven Spin-dependent Currents in Semiconductor Quantum Rings will most certainly appreciate the feedback.
Profile ID: LFWR-SCP-O-487584