Spin-orbit interaction induced spin selective transmission through a multi-terminal mesoscopic ring

Abstract

Articles you may be interested inInterplay of magnetic field and geometry in magneto-transport of mesoscopic loops with Rashba and Dresselhaus spin-orbit interactions Spindependent transmission through a mesoscopic ring: determination of the spinorbit interaction strengths from the final spin orientation and spin flips AIP Conf.Spin dependent transport in a multi-terminal mesoscopic ring is investigated in presence of Rashba and Dresselhaus spin-orbit interactions. Within a tight-binding framework, we use a general spin density matrix formalism to evaluate all three components (P x , P y , and P z ) of the polarization vector associated with the charge current through the outgoing leads. It explores the dynamics of the spin polarization vector of current propagating through the system subjected to the Rashba and/or the Dresselhaus spin-orbit couplings. The sensitivity of the polarization components on the electrode-ring interface geometry is discussed in detail. Our present analysis provides an understanding of the coupled spin and electron transport in mesoscopic bridge systems. V C 2013 AIP Publishing LLC.

Generation of fully spin-polarized currents in three-terminal graphene-based transistors

“…Note that in most three-terminal systems the spin-orbit interaction which couples the spin of electrons with their motion is the main source in generation of pure spin currents [26][27][28]36 . Moreover, the spin-orbit interaction may lead to spin-flip scattering between electronic states with opposite spin orientations which lessens the degree of spin polarization in multiterminal structures.…”

“…On the other hand, in the case of spintronic devices, it is very important to find nonmagnetic materials and design appropriate nano-structures where a spinpolarized current can be injected and flowed without becoming depolarized 21 . Historically, various three-terminal structures for generating spin currents with spin-orbit interaction, ferromagnetic contacts and interference effect have been proposed [22][23][24][25][26][27][28] . Here, we propose novel spin-dependent Y-shaped and Tshaped transistors based solely on carbon atoms and intrinsic magnetism in zigzag edges for generating fully spinpolarized currents in the system.…”

Spin conductances and spin polarization components in a three-terminal ring subject to Rashba coupling

“…15 Various other aspects of spin dependent transport in multi-terminal mesoscopic rings have also been investigated, including charge and spin currents, 16 the number of terminals, 17 the effects of coupling between the leads and the ring, 18 and zero-conductance resonances. 19 Although there have been a few reports involving spin dependent transport in multi-terminal mesoscopic rings, [14][15][16][17][18][19][20] there have been, to the best of our knowledge, few works 20 related to the components of the spin polarization vectors in 3-lead rings.…”

Spin-dependent Seebeck effect in Aharonov–Bohm rings with Rashba and Dresselhaus spin–orbit interactions

“…The generation of spin polarization by utilizing mesoscopic ring in the presence of SOI with [17,18,19] and without magnetic field [14,20,21,22,23,24,25,26] have been widely studied. The magnetic flux induces the geometric phase of wave functions of electrons in the ring, implying that there is a phase difference between the upper arm and the lower one.…”