Quantum Dynamics of a Nanomagnet driven by Spin-Polarized Current

Abstract

A quantum theory of magnetization dynamics of a nanomagnet as a sequence of scatterings of each electron spin with the macrospin state of the magnetization results in each encounter a probability distribution of the magnetization recoil state associated with each outgoing state of the electron. The quantum trajectory of the magnetization contains the average motion tending in the large spin limit to the semi-classical results of spin transfer torque and the fluctuations giving rise to a quantum magnetization noise and an additional noise traceable to the current noise.

4 pages, 4 figures

References in corpus (4)

• Spin Transfer Torques
• Stochastic resonance of a nanomagnet excited by spin transfer torque
• Spin-torque shot noise in magnetic tunnel junctions
• Coherent control of nanomagnet dynamics via ultrafast spin torque pulses

Cited by in corpus (12)

• Spin transfer due to quantum fluctuations of magnetization
• Quantum spin-transfer torque induced nonclassical magnetization dynamics and electron-magnetization entanglement
• A Quantum Approach of Meso-Magnet Dynamics with Spin Transfer Torque
• Energy and momentum conservation in spin transfer
• Quantum magnetization fluctuations via spin shot noise
• Quantum kinetic theory of spin-transfer torque and magnon-assisted transport in nanostructures
• Theory of atomistic simulation of spin-transfer torque in nanomagnets
• Influence of Quantum and Thermal Noise on Spin-Torque-Driven Magnetization Switching
• Shot noise of charge and spin transport in a junction with a precessing molecular spin
• Magnetization Dynamics driven by Non-equilibrium Spin-Orbit Coupled Electron Gas
• Quantum noise in the spin transfer torque effect
• Optimal Control of Stochastic Magnetization Dynamics by Spin Current