Theory of Electric Dipole Spin Resonance in a Parabolic Quantum Well

Details Theory of Electric Dipole Spin Resonance in a Parabolic Quantum Well Theory of Electric Dipole Spin Resonance in a Parabolic Quantum Well

2006-02-10

arxiv.org/abs/cond-mat/0602264v1

Physics

Condensed Matter

Mesoscale and Nanoscale Physics

45 pages 6 figure

Scientific paper

10.1103/PhysRevB.73.165325

A theory of Electric Dipole Spin Resonance (EDSR), that is caused by various mechanisms of spin-orbit coupling, is developed as applied to free electrons in a parabolic quantum well. Choosing a parabolic shape of the well has allowed us to find explicit expressions for the EDSR intensity and its dependence on the magnetic field direction in terms of the basic parameters of the Hamiltonian. By using these expressions, we have investigated and compared the effect of specific mechanisms of spin orbit (SO) coupling and different polarizations of ac electric field on the intensity of EDSR. Angular dependences of the EDSR intensity are indicative of the relative contributions of the competing mechanisms of SO coupling. Our results show that electrical manipulating electron spins in quantum wells is generally highly efficient, especially by an in-plane ac electric field.

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