• Rapid Communication

Stopping electrons with radio-frequency pulses in the quantum Hall regime

Benoit Gaury, Joseph Weston, and Xavier Waintal
Phys. Rev. B 90, 161305(R) – Published 22 October 2014
PDFHTMLExport Citation

Abstract

Most of the functionality of modern electronic circuits relies on the possibility to modify the path followed by the electrons using, e.g., field effect transistors. Here we discuss the interplay between the modification of this path and the quantum dynamics of the electronic flow. Specifically, we study the propagation of charge pulses through the edge states of a two-dimensional electron gas in the quantum Hall regime. By sending radio-frequency (rf) excitations on a top gate capacitively coupled to the electron gas, we manipulate these edge states dynamically. We find that a fast rf change of the gate voltage can stop the propagation of the charge pulse inside the sample. This effect is intimately linked to the vanishing velocity of bulk states in the quantum Hall regime and the peculiar connection between momentum and transverse confinement of Landau levels. Our findings suggest possibilities for stopping, releasing, and switching the trajectory of charge pulses in quantum Hall systems.

  • Figure
  • Figure
  • Figure
  • Figure
  • Received 28 April 2014
  • Revised 16 June 2014

DOI:https://doi.org/10.1103/PhysRevB.90.161305

©2014 American Physical Society

Authors & Affiliations

Benoit Gaury, Joseph Weston, and Xavier Waintal*

  • Université Grenoble Alpes, INAC-SPSMS, F-38000 Grenoble, France and CEA, INAC-SPSMS, F-38000 Grenoble, France

  • *xavier.waintal@cea.fr

Article Text (Subscription Required)

Click to Expand

Supplemental Material (Subscription Required)

Click to Expand

References (Subscription Required)

Click to Expand
Issue

Vol. 90, Iss. 16 — 15 October 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
×