Kinetics of spin coherence of electrons in $n$-type InAs quantum wells under intense terahertz laser fields

Abstract

Spin kinetics in $n$-type InAs quantum wells under intense terahertz laser fields is investigated by developing fully microscopic kinetic spin Bloch equations via the Floquet-Markov theory and the nonequilibrium Green's function approach, with all the relevant scattering, such as the electron-impurity, electron-phonon, and electron-electron Coulomb scattering explicitly included. We find that a {\em finite} steady-state terahertz spin polarization induced by the terahertz laser field, first predicted by Cheng and Wu [Appl. Phys. Lett. {\bf 86}, 032107 (2005)] in the absence of dissipation, exists even in the presence of all the scattering. We further discuss the effects of the terahertz laser fields on the spin relaxation and the steady-state spin polarization. It is found that the terahertz laser fields can {\em strongly} affect the spin relaxation via hot-electron effect and the terahertz-field-induced effective magnetic field in the presence of spin-orbit coupling. The two effects compete with each other, giving rise to {\em non-monotonic} dependence of the spin relaxation time as well as the amplitude of the steady state spin polarization on the terahertz field strength and frequency. The terahertz field dependences of these quantities are investigated for various impurity densities, lattice temperatures, and strengths of the spin-orbit coupling. Finally, the importance of the electron-electron Coulomb scattering on spin kinetics is also addressed.

arXiv comment17 pages, 16 figures, Phys. Rev. B 78, 2008, in press

References in corpus (45)

• Spintronics: Fundamentals and applications
• Spins in few-electron quantum dots
• Coherent control of a single electron spin with electric fields
• Semiconductor Spintronics
• Driven quantum transport on the nanoscale
• Electric Dipole Induced Spin Resonance in Quantum Dots
• Orbital mechanisms of electron spin manipulation by an electric field
• Measurement of Rashba and Dresselhaus spin-orbit magnetic fields
• Coherent single electron spin control in a slanting Zeeman field
• Excitonic Dynamical Franz-Keldysh Effect
• Dynamical Franz-Keldysh effect
• Floquet-Markov description of the parametrically driven, dissipative harmonic quantum oscillator
• Imaging spin flows in semiconductors subject to electric, magnetic, and strain fields
• Electric Dipole Spin Resonance for Heavy Holes in Quantum Dots
• High temperature spin dephasing in n-typed GaAs quantum wells
• Magneto-Gyrotropic Photogalvanic Effects in Semiconductor Quantum Wells
• Effect of initial spin polarization on spin dephasing and electron g factor in a high-mobility two-dimensional electron system
• Efficient electron spin manipulation in a quantum well by an in-plane electric field
• Electric Dipole Induced Spin Resonance in Disordered Semiconductors
• Hot-electron effect in spin dephasing in $n$-type GaAs quantum wells
• Spin relaxation in $n$-type GaAs quantum wells from a full microscopic approach
• Kinetics of spin coherence of electrons in an undoped semiconductor quantum well
• Linear optical absorption spectra of mesoscopic structures in intense THz fields: free particle properties
• Spin Dynamics and Spin Transport
• Oscillatory D'yakonov-Perel' spin dynamics in two dimensional electron gases
• Detection of large magneto-anisotropy of electron spin dephasing in a high-mobility two-dimensional electron system in a $[001]$ GaAs/AlGaAs quantum well
• Dependence of spin dephasing on initial spin polarization in a high-mobility two-dimensional electron system
• Hole spin dephasing in $p$-type semiconductor quantum wells
• Multi-subband effect in spin dephasing in semiconductor quantum wells
• Theory of Electric Dipole Spin Resonance in a Parabolic Quantum Well
• Spin relaxation due to the Bir-Aronov-Pikus mechanism in intrinsic and $p$-type GaAs quantum wells from a fully microscopic approach
• Spin relaxation under identical Dresselhaus and Rashba coupling strengths in GaAs quantum wells
• Control of spin coherence in $n$-type GaAs quantum wells using strain
• Effect of electron-electron scattering on spin dephasing in a high-mobility low-density twodimensional electron gas
• Intense terahertz laser fields on a quantum dot with Rashba spin-orbit coupling
• Intense terahertz laser fields on a two-dimensional electron gas with Rashba spin-orbit coupling
• Role of spin-orbit coupling in the far infrared absorption of lateral semiconductor dots
• Spin oscillations in transient diffusion of a spin pulse in n-type semiconductor quantum wells
• Control of electron spin and orbital resonance in quantum dots through spin-orbit interactions
• Resonant spin polarization and spin current in a two-dimensional electron gas
• Diffusion and transport of spin pulses in an $n$-type semiconductor quantum well
• Spin relaxation in an InAs quantum dot in the presence of terahertz driving fields
• Non-Markovian hole spin kinetics in $p$-type GaAs quantum wells
• Optically-Induced Suppression of Spin Relaxation in Two-Dimensional Electron Systems with Rashba Interaction
• Intense terahertz laser fields on a two-dimensional hole gas with Rashba spin-orbit coupling

Cited by in corpus (7)

• Spin dynamics in semiconductors
• Optical response of graphene under intense terahertz fields
• Electron spin relaxation in bulk III-V semiconductors from a fully microscopic kinetic spin Bloch equation approach
• Interplay between spin-orbit interactions and a time-dependent electromagnetic field in monolayer graphene
• Electron spin relaxation in paramagnetic Ga(Mn)As quantum wells
• Pulse-pumped double quantum dot with spin-orbit coupling
• Terahertz radiation-induced conductivity, Kerr and Faraday angles, and spin textures in a two-dimensional electron gas with spin-orbit coupling subjected to a high magnetic field and periodic potential