Fast-electron magneto-optical spectrum of a two-dimensional electron gas in the presence of spin-orbit interaction and quantizing magnetic fields

C. H. Yang, W. Xu, and C. S. Tang
Phys. Rev. B 76, 155301 – Published 2 October 2007

Abstract

In this paper, we present a theoretical study of the optical spectrum induced by electron-electron interaction in a spin-split two-dimensional electron gas (2DEG) in the presence of high magnetic fields. The presence of the Zeeman splitting and the Rashba spin-orbit interaction (RSOI) is considered so that the profile of the magneto-optical conductivity depends strongly on spintronic coefficients. We find that in sharp contrast to the case of a spin-degenerate 2DEG, the presence of the RSOI in a 2DEG can open up new channels for magneto-optical transition via absorption scattering. The unique features of the selection rules for optical transition in a spin-split 2DEG are examined and the dependence of the magneto-optical spectrum on radiation frequency, magnetic field, and sample parameters is discussed. This study is relevant to the characterization of the Rashba spintronic systems using magneto-optical experiments and to the application of systems such as terahertz magneto-optical devices.

  • Figure
  • Figure
  • Figure
  • Figure
  • Received 1 February 2007

DOI:https://doi.org/10.1103/PhysRevB.76.155301

©2007 American Physical Society

Authors & Affiliations

C. H. Yang1,2, W. Xu2,3,*, and C. S. Tang4

  • 1Faculty of Mathematics and Physics, Nanjing University of Information Science and Technology, Nanjing 210044, China
  • 2Key Laboratory of Materials Physics, Institute of Solid State Physics, Chinese Academy of Sciences, Hefei 230031, China
  • 3Department of Theoretical Physics, Research School of Physical Sciences and Engineering, Australian National University, Canberra Australian Capital Territory 0200, Australia
  • 4Research Center for Applied Sciences, Academia Sinica, Taipei 11529, Taiwan

  • *wen105@rsphysse.anu.edu.au

Article Text (Subscription Required)

Click to Expand

References (Subscription Required)

Click to Expand
Issue

Vol. 76, Iss. 15 — 15 October 2007

Reuse & Permissions
Access Options
Author publication services for translation and copyediting assistance advertisement

Authorization Required


×
×

Images

×

Sign up to receive regular email alerts from Physical Review B

Log In

Cancel
×

Search


Article Lookup

Paste a citation or DOI

Enter a citation
×