Orbital magnetic phase and pure persistent spin current in spin-orbit coupling mesoscopic rings
arXiv:1503.04274 · doi:10.1209/0295-5075/86/67009
Abstract
By solving the Rashba model of mesoscopic rings, we give analytically the ground-state properties of the ring, including the spin polarization, the persistent charge and spin currents (PCC and PSC). These ground-state properties can be given based on four kinds of electron numbers in rings. The effect of the self-inductance of the ring leads to the self-sustained magnetic flux (SSMF) and the self-sustained PCC and PSC, which break spontaneously time-reversal symmetry to form orbital magnetic phase (OMP). To tune the spin-orbit coupling strength or electron number of the ring can induce the phase transition between the OMP and non-OMP. For exact one-dimensional rings we find the coexistence of the pure PSC and SSMF. This property of the pure PSC may provide a new scheme to measure the pure PSC.
7 pages, 2 figures
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Cited by in corpus (5)
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- Non-adiabatic generation of a pure spin current in a 1D quantum ring with spin-orbit interaction
- Persistent charge and spin currents in a 1D ring with Rashba and Dresselhaus spin-orbit interactions by excitation with a terahertz pulse
- Theory of spin polarization in mesoscopic spin-orbit coupling systems
- Nonadiabatic generation of spin currents in a quantum ring with Rashba and Dresselhaus spin-orbit interactions