Role of spin-orbit coupling in the far infrared absorption of lateral semiconductor dots

Abstract

We investigate the relevance of the spin-orit coupling to the far-infrared absorption of two-dimensional semiconductor dots. Varying the strength of the Dresselhaus term, a mechanism feasible in experiment by changing the dot width, distinctive splittings of the Kohn peak as well as additional low energy modes are predicted in a non-interacting model. Each mode has a spatial distribution of charge, perpendicular and in-plane spin densities that correlate in a peculiar way with the frequency and polarization of the external field. We study the robustness of these features against electron-electron interactions as well as the appearance of interaction-induced additional characteristics.

5 pages, 6 figures. Accepted for publication in Phys. Rev. B 2002

References in corpus (2)

• Spin-orbit coupling effects on quantum transport in lateral semiconductor dots
• Far infrared absorption in triangular and square quantum dots: characterization of corner and side modes

Cited by in corpus (14)

• Spin-orbit effects in GaAs quantum wells: Interplay between Rashba, Dresselhaus, and Zeeman interactions
• Electronic spin precession in semiconductor quantum dots with spin-orbit coupling
• Quantum dots based on spin properties of semiconductor heterostructures
• Intense terahertz laser fields on a quantum dot with Rashba spin-orbit coupling
• Spin switching in semiconductor quantum dots through spin-orbit coupling
• High density limit of the two-dimensional electron liquid with Rashba spin-orbit coupling
• Two exact properties of the perturbative expansion for the two-dimensional electron liquid with Rashba or Dresselhaus spin-orbit coupling
• Kinetics of spin coherence of electrons in $n$-type InAs quantum wells under intense terahertz laser fields
• Zeeman energy and anomalous spin splitting in lateral GaAs quantum dots
• Spin-orbit effects on the Larmor dispersion relation in GaAs quantum wells
• Spin-orbit excitations of quantum wells
• Predicted signatures of the intrinsic spin Hall effect in closed systems
• Far Infrared absorption of non center of mass modes and optical sum rule in a few electron quantum dot with Rashba spin-orbit coupling
• Magneto-Optical Quantum Switching in a System of Spinor Excitons