Spin currents, spin populations, and dielectric function of noncentrosymmetric semiconductors

Article

关键词: ELECTRON-GAS;    POLARIZATION;    RESONANCE;    CRYSTALS;    SYSTEMS;   

DOI  :  10.1103/PhysRevB.70.161201

来源: SCIE

【 摘 要 】

In Maxwellian electrodynamics, specific properties of the responses to external fields are included in constitutive equations. For noncentrosymmetric semiconductors, spin conductivity can be expressed in terms of the contribution of electric-dipole transitions between spin-split spectrum branches to the dielectric function. In a dissipationless regime, a spin current driven by an external electric field is tantamount to a background current in an equilibrium system with a reduced symmetry. The importance of transients and gradients for efficient spin-flux injection is emphasized.

【 授权许可】

Free