2010/04/20 by Xi Chen, Qing‐Rong Zheng, Qing-Rong Zheng +1 · 2 citations
Engineering · Physics and Astronomy · #Condensed matter physics #Ferromagnetism #Magnetic field #Magnetic flux #Magnetic flux quantum #Magnetic properties of thin films #Physics #Quantum and electron transport phenomena #Quantum dot #Quantum mechanics #Semiconductor materials and devices #Spin (aerodynamics) #Spin–orbit interaction #cond-mat.mes-hall #cond-mat.str-el
paper · pdf · doi:10.1088/0953-8984/22/18/186004
published in Journal of Physics Condensed Matter 22(18), 186004 (IOP Publishing) · 17pages, 7figures
openalex publication_date 2010/04/20 · arxiv created 2010/04/26 · arxiv updated 2010/04/27 · openalex created_date 2025/10/10 · openalex updated_date 2026/08/05
The spin transfer effect in a ferromagnet-quantum dot (insulator)-ferromagnet Aharonov-Bohm (AB) ring system with Rashba spin-orbit (SO) interactions is investigated by means of the Keldysh nonequilibrium Green function method. It is found that both the magnitude and direction of the spin transfer torque (STT) acting on the right ferromagnet electrode can be effectively controlled by changing the magnetic flux threading the AB ring or the gate voltage on the quantum dot. The STT can be greatly augmented by matching a proper magnetic flux and an SO interaction at a cost of low electrical current. The STT, electrical current and spin current are uncovered to oscillate with the magnetic flux. The present results are expected to be useful for information storage in nanospintronics.