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Spin exchange interaction with tunable range between graphene quantum dots
Spin exchange interaction tunable graphene quantum dots
2010/11/22
We study the spin exchange between two electrons localized in separate quantum dots in graphene.The electronic states in the conduction band are coupled indirectly by tunneling to a common continuum o...
Existence of vertical spin stiffness in Landau-Lifshitz-Gilbert equation in ferromagnetic semiconductors
Existence of vertical spin stiffness ferromagnetic semiconductors
2010/11/18
We calculate the magnetization torque due to the spin polarization of the itinerant electrons by deriving the kinetic spin Bloch equations based on the s-d model. We find that the first-order gradient...
Semiconductor quantum ring as a solid-state spin qubit
Semiconductor quantum ring solid-state spin qubit
2010/11/19
The implementation of a spin qubit in a quantum ring occupied by one or a few electrons is proposed. Quantum bit involves the Zeeman sublevels of the highest occupied orbital. Such a qubit can be init...
Transient Spin Dynamics in Semiconductors
Spin polarized transport Semiconductors Interfaces Electrical injection
2010/9/25
We investigate the spin-resolved dynamics of spin-polarized carriers injected via a ferromagnetic scanningtunnelling-microscope tip (STM tip) into uniformly and non-uniformly n-doped bulk semiconducto...
Manipulation with Spin Ordering in Ferromagnetic Semiconductors
Spin Ordering Ferromagnetic Semiconductors
2010/10/21
A short overview is given of recent advances in the field of carrier-controlled ferromagnetism in Mn-based III-V and II-VI diluted magnetic semiconductors and their nanostructures. The tailoring of do...