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Title:Electrical control of spin dynamics in finite one-dimensional systems
Authors:A. Pertsova, M. Stamenova, and S. Sanvito, 2011
Abstract: We investigate the possibility of the electrical control of spin transfer in monoatomic chains incorporating spin impurities. Our theoretical framework is the mixed quantum-classical (Ehrenfest) description of the spin dynamics, in the spirit of the s-d model, where the itinerant electrons are described by a tight-binding model while localized spins are treated classically. Our main focus is on the dynamical exchange interaction between two well-separated spins. This can be quantified by the transfer of excitations in the form of transverse spin oscillations. We systematically study the effect of an electrostatic gate bias Vg on the interconnecting channel and we map out the long-range dynamical spin transfer as a function of Vg. We identify regions of Vg giving rise to significant amplification of the spin transmission at low frequencies and relate this to the electronic structure of the channel.
ICHEC Project:Ab initio simulations of spin-dynamics
Publication:Phys. Rev. B 84, 155436 (2011). doi: 10.1103/PhysRevB.84.155436
URL: http://link.aps.org/doi/10.1103/PhysRevB.84.155436
Status: Published

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