Spin-polarized dynamic transport in tubular two-dimensional electron gases

E. A. Rothstein, B. Horovitz, O. Entin-Wohlman, and A. Aharony
Phys. Rev. B 90, 245425 – Published 17 December 2014

Abstract

The ac conductance of a finite tubular two-dimensional electron gas is studied in the presence of the Rashba spin-orbit interaction. When the tube is coupled to two reservoirs, that interaction splits the steps in the dc current, introducing energy ranges with spin-polarized currents. For this setup, we calculate the current-current correlations (the noise spectrum) and show that the existence of these dc spin-polarized currents can be deduced from the shot noise. We also find that the Wigner-Smith time delay is almost unaffected by the spin-orbit interaction. When the tube is coupled to a single reservoir, we calculate the quantum capacitance and the charge-relaxation resistance, and find that they exhibit singularities near the openings of new channels.

  • Figure
  • Figure
  • Figure
  • Figure
  • Figure
  • Figure
  • Figure
3 More
  • Received 13 October 2014
  • Revised 8 December 2014

DOI:https://doi.org/10.1103/PhysRevB.90.245425

©2014 American Physical Society

Authors & Affiliations

E. A. Rothstein1, B. Horovitz1, O. Entin-Wohlman1,2,*, and A. Aharony1,2

  • 1Department of Physics, Ben Gurion University, Beer Sheva 84105, Israel
  • 2Raymond and Beverly Sackler School of Physics and Astronomy, Tel Aviv University, Tel Aviv 69978, Israel

  • *oraentin@bgu.ac.il

Article Text (Subscription Required)

Click to Expand

References (Subscription Required)

Click to Expand
Issue

Vol. 90, Iss. 24 — 15 December 2014

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
×