Magnetoresistance induced by rare strong scatterers in a high-mobility two-dimensional electron gas

L. Bockhorn, I. V. Gornyi, D. Schuh, C. Reichl, W. Wegscheider, and R. J. Haug
Phys. Rev. B 90, 165434 – Published 27 October 2014

Abstract

We observe a strong negative magnetoresistance at nonquantizing magnetic fields in a high-mobility two-dimensional electron gas. This strong negative magnetoresistance consists of a narrow peak around zero magnetic field and a huge magnetoresistance at larger fields. The peak shows parabolic magnetic field dependence and is attributed to the interplay of smooth disorder and rare strong scatterers. We identify the rare strong scatterers as macroscopic defects in the material and determine their density from the peak curvature.

  • Figure
  • Figure
  • Figure
  • Figure
  • Received 3 February 2014
  • Revised 7 October 2014

DOI:https://doi.org/10.1103/PhysRevB.90.165434

©2014 American Physical Society

Authors & Affiliations

L. Bockhorn1,*, I. V. Gornyi2,3, D. Schuh4, C. Reichl5, W. Wegscheider5, and R. J. Haug1

  • 1Institut für Festkörperphysik, Leibniz Universität Hannover, D-30167 Hannover, Germany
  • 2Institut für Nanotechnologie, Karlsruhe Institute of Technology, D-76021 Karlsruhe, Germany
  • 3A.F. Ioffe Physico-Technical Institute, 194021 St. Petersburg, Russia
  • 4Institut für Experimentelle und Angewandte Physik, Universität Regensburg, D-93053 Regensburg, Germany
  • 5Laboratorium für Festkörperphysik, ETH Zürich, CH-8093 Zürich, Switzerland

  • *bockhorn@nano.uni-hannover.de

Article Text (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
×