Strain-Induced Coupling of Spin Current to Nanomechanical Oscillations

Mal’shukov, A. G.; Tang, Chi-Shung; Chu, Chon-Saar; Chao, K. A.

doi:10.1103/physrevlett.95.107203

Cited by 49 publications

(40 citation statements)

References 21 publications

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“…Similarly, a setup coupling the electron spin to the mechanical motion of a nanomechanical system is proposed in Ref. 58. The latter method employs the strain-induced spin-orbit interaction of electrons in a narrow gap semiconductor.…”

Section: Discussion Of Resultsmentioning

confidence: 99%

Tunneling currents in ferromagnetic systems with multiple broken symmetries

2007

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A system exhibiting multiple simultaneously broken symmetries offers the opportunity to influence physical phenomena such as tunneling currents by means of external control parameters. In this paper, we consider the broken SU (2) (internal spin) symmetry of ferromagnetic systems coexisting with i) the broken U (1) symmetry of superconductors and ii) the broken spatial inversion symmetry induced by a Rashba term in a spin-orbit coupling Hamiltonian. In order to study the effect of these broken symmetries, we consider tunneling currents that arise in two different systems; tunneling junctions consisting of non-unitary spin-triplet ferromagnetic superconductors and junctions consisting of ferromagnets with spin-orbit coupling. In the former case, we consider different pairing symmetries in a model where ferromagnetism and superconductivity coexist uniformly. An interplay between the relative magnetization orientation on each side of the junction and the superconducting phase difference is found, similarly to that found in earlier studies on spin-singlet superconductivity coexisting with spiral magnetism. This interplay gives rise to persistent spin-and charge-currents in the absence of an electrostatic voltage that can be controlled by adjusting the relative magnetization orientation on each side of the junction. In the second system, we study transport of spin in a system consisting of two ferromagnets with spin-orbit coupling separated by an insulating tunneling junction. A persistent spin-current across the junction is found, which can be controlled in a well-defined manner by external magnetic and electric fields. The behavior of this spin-current for important geometries and limits is studied.

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Section: Discussion Of Resultsmentioning

confidence: 99%

Tunneling currents in ferromagnetic systems with multiple broken symmetries

2007

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“…Alternative concepts for nanomachines are based on electrostatic forces, 1 thermal fluctuations, 2 torques induced by circularly polarized light, 3 and angular momentum transfer by spin-polarized currents. [4][5][6][7] In this paper, we elaborate on this last idea. A spin-polarized current carries an angular momentum current,…”

Section: Introductionmentioning

confidence: 99%

Current-driven ferromagnetic resonance, mechanical torques, and rotary motion in magnetic nanostructures

2007

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We study theoretically the detection and possible utilization of electric current-induced mechanical torques in ferromagnetic-normal-metal heterostructures generated by spin-flip scattering or the absorption of transverse spin currents by a ferromagnet. To this end, we analyze the dc voltage signals over a spin valve driven by an ac current. In agreement with recent studies, this "rectification," measured as a function of ac frequency and applied magnetic field, contains important information on the magnetostatics and magnetodynamics. Subsequently, we show that the vibrations excited by spin-transfer to the lattice can be detected as a splitting of the dc voltage resonance. Finally, we propose a concept for a spin-transfer-driven electric nanomotor based on integrating metallic nanowires with carbon nanotubes, in which the current-induced torques generate a rotary motion.

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“…On the other hand, the strain can be associated with mechanical motion of solid, in particular, with oscillations in nanomechanical systems. This effect, in turn, facilitates the tuning of SOI with nanomechanical oscillations and allows the design of interesting devices [6]. Therefore, a detailed knowledge of the strain induced SOI in semiconductors is essential for understanding, modeling, and design of future functional devices.…”

Section: Introductionmentioning

confidence: 99%

Strain Induced k-Linear Spin Splitting in III-V Semiconductors

Skierkowski

Majewski

2007

Acta Phys. Pol. A

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We present theoretical studies of the linear-k strain induced spin splitting of the conduction band in the zinc-blende semiconductors. The studies are based on ab initio calculations performed within the density functional theory with non-scalar relativistic effects fully taken into account. This permits one to construct effective Hamiltonian for the strain induced linear-k spin splitting of the zinc-blende semiconductors. This Hamiltonian reproduces fully the structure of the strain induced linear-k spin splitting and generalizes previously introduced and commonly used effective Hamiltonian.

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Strain-Induced Coupling of Spin Current to Nanomechanical Oscillations

Cited by 49 publications

References 21 publications

Tunneling currents in ferromagnetic systems with multiple broken symmetries

Tunneling currents in ferromagnetic systems with multiple broken symmetries

Current-driven ferromagnetic resonance, mechanical torques, and rotary motion in magnetic nanostructures

Strain Induced k-Linear Spin Splitting in III-V Semiconductors

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