Spin and charge optical conductivities in spin-orbit coupled systems

Abstract

We study the frequency dependent spin- and charge- conductivity tensors of a two-dimensional electron gas (2DEG) with Rashba and Dresselhaus spin-orbit interaction. We show that the angular anisotropy of the spin-splitting energy induced by the interplay between the Rashba and Dresselhaus couplings gives rise to a characteristic spectral behavior of the spin and charge response which is significantly different from that of pure Rashba or Dresselhaus case. Such new spectral structures open the possibility for control of the optical response by applying an external bias and/or by adjusting the light frequency. In addition, it is shown that the relative strength of the spin-orbit coupling parameters can be obtained through optical probing.

13 pages, 4 figures. Revised version

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Cited by in corpus (13)

• Persistent Spin Textures in Semiconductor Nanostructures
• Anisotropic plasmons in a two-dimensional electron gas with spin-orbit interaction
• Beating of Friedel oscillations induced by spin-orbit interaction
• Frequency dependence of induced spin polarization and spin current in quantum wells
• Spin Hall and longitudinal conductivity of a conserved spin current in two dimensional heavy-hole gases
• Charge and spin density response functions of the clean two-dimensional electron gas with Rashba spin-orbit coupling at finite momenta and frequencies
• Two-dimensional electron gas in the regime of strong light-matter coupling: Dynamical conductivity and all-optical measurements of Rashba and Dresselhaus coupling
• Drude weight and optical conductivity of a two-dimensional heavy-hole gas with $k$-cubic spin-orbit interactions
• Thermoelectric effect of multiferroic oxide interfaces
• Spin torque contribution to the a.c. spin Hall conductivity
• Hybrid surface waves in two-dimensional Rashba-Dresselhaus materials
• Plasmonic detection of Rashba spin-orbit coupling in monolayer transition-metal dichalcogenides
• Vanishing of interband light absorption in a persistent spin helix state