Magnetoresistance of electrons in quantum ring with Rashba spin-orbit interaction
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The influence of Rashba spin-orbit interaction on the transport properties of the two-dimensional quantum ring with finite width has been investigated in the presence of the uniform perpendicular magnetic field. The dependence of magnetoresistance on the magnetic field and Rashba spin-orbit coupling parameter in quantum ring with finite width are investigated. It was shown that in the presence Rashba spin-orbit interaction that the beating pattern is destroyed.Keywords:
Spin–orbit interaction
Rashba effect
Orbit (dynamics)
We show theoretically that conversion between spin and charge by spin-orbit interaction in metals occurs even in a nonlocal setup where magnetization and spin-orbit interaction are spatially separated if electron diffusion is taken into account. Calculation is carried out for the Rashba spin-orbit interaction treating the coupling with a ferromagnet perturbatively. The results indicate the validity of the concept of effective spin gauge field (spin motive force) in the nonlocal configuration. The inverse Rashba-Edelstein effect observed for a trilayer of a ferromagnet, a normal metal and a heavy metal can be explained in terms of the nonlocal effective spin gauge field.
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Rashba effect
Orbit (dynamics)
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The observation of Rashba spin splitting in graphene on the Ni (111) substrate, motivates the studies to manipulate electron spin via Rashba spin-orbit coupling in graphene. We derive the effective spin-orbit force in Rashba coupled graphene from the Heisenberg equation of motion. The spin-orbit force, different from that in conventional semiconductors, can provide us a physical picture of unusual spin separation due to Rashba spin-orbit coupling in graphene. Finally, we numerically calculate spin Hall conductance and qualitatively explain the result by the spin-orbit force picture in graphene.
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Rashba effect
Orbit (dynamics)
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Influence of Rashba spin-orbit interaction in InAs/GaAs self-organization quantum dot is investigated by considering the Rashba spin-orbit interaction with intermediate coupling method.Our numeriaul results show that the Rashba spin-orbit interaction have more effect to polaron's ground state energy.The electron vector dependence of the ratio of spin-orbit interaction to the total ground state energy or other energy composition is obvious and the splitting energy has the same magnitude as the contribution of the polaron,so it can not be neglected.One can see that even without any external magnetic field,the ground state energy can be split by the Rashba spin-orbit interaction,and this split is not a single but a complex one.Since the present of the phonons,whose energy gives negative contribution to the polaron's,the spin-splitting states of the polaron are more stable than electron's.Rashba interaction can not be neglected.
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Spin–orbit interaction
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In this work I review of the theoretical and experimental issue related to the Rashba Spin-Orbit interaction in semiconductor nanostructures. The Rashba spin-orbit interaction has been a promising candidate for controlling the spin of electrons in the field of semiconductor spintronics. In this work, I focus study of the electrons spin and holes in isolated semiconductor quantum dots and rings in the presence of magnetic fields. Spin-dependent thermodynamic properties with strong spin-orbit coupling inside their band structure in systems are investigated in this work. Additionally, specific heat and magnetization in two dimensional, one-dimensional quantum ring and dot nanostructures with Spin Orbit Interaction are discussed.
Spin–orbit interaction
Rashba effect
Semiconductor nanostructures
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The gate-controllable Ruderman-Kittel-Kasuya-Yosida (RKKY) magnetic interaction between the magnetic impurities embedded in one- and two-dimensional electron gas in the presence of Rashba spin-orbit coupling was analyzed theoretically. By using the eigenfunctions of the single-particle Rashba Hamiltonian as the basis of second quantization, we derived the RKKY interaction by fully taking into account the spin-orbit interaction. The dependence of the RKKY magnetic interaction on the Rashba spin-orbit coupling strength was obtained numerically. Our results clearly indicate that the RKKY interaction can be significantly modified by an applied voltage via the Rashba spin-orbit coupling.
RKKY interaction
Spin–orbit interaction
Rashba effect
Hamiltonian (control theory)
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The influence of Rashba spin-orbit interaction on the transport properties of the two-dimensional quantum ring with finite width has been investigated in the presence of the uniform perpendicular magnetic field. The dependence of magnetoresistance on the magnetic field and Rashba spin-orbit coupling parameter in quantum ring with finite width are investigated. It was shown that in the presence Rashba spin-orbit interaction that the beating pattern is destroyed.
Spin–orbit interaction
Rashba effect
Orbit (dynamics)
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Spin–orbit interaction
Hamiltonian (control theory)
Rashba effect
Orbit (dynamics)
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Rashba effect
Spin–orbit interaction
Orbit (dynamics)
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It is shown that in two-dimensional semiconductors, the electron-phonon interaction and polaron mass correction are both significantly enhanced by the Rashba spin-orbit coupling. The mass correction is positive for the upper Rashba branch and negative for the lower Rashba branch. Both Rashba branches have the same polaron binding energy, which is higher than that for systems in the absence of spin-orbit interaction. To the leading order, the correction to the binding energy is proportional to the square of the spin-orbit coupling strength.
Spin–orbit interaction
Rashba effect
Orbit (dynamics)
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We perform an all-optical spin-dynamic measurement of the Rashba spin-orbit interaction in (110)-oriented GaAs/AlGaAs quantum wells. The crystallographic direction of quantum confinement allows us to disentangle the contributions to spin-orbit coupling from the structural inversion asymmetry (Rashba term) and the bulk inversion asymmetry. We observe an unexpected temperature dependence of the Rashba spin-orbit interaction strength that signifies the importance of the usually neglected higher-order terms of the Rashba coupling.
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Orbit (dynamics)
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