• Editors' Suggestion
  • Rapid Communication

Determining the Rashba parameter from the bilinear magnetoresistance response in a two-dimensional electron gas

D. C. Vaz, F. Trier, A. Dyrdał, A. Johansson, K. Garcia, A. Barthélémy, I. Mertig, J. Barnaś, A. Fert, and M. Bibes
Phys. Rev. Materials 4, 071001(R) – Published 2 July 2020

Abstract

Two-dimensional (2D) Rashba systems have been intensively studied in the last decade due to their unconventional physics, tunability capabilities, and potential for spin-charge interconversion when compared to conventional heavy metals. With the advent of a new generation of spin-based logic and memory devices, the search for Rashba systems with more robust and larger conversion efficiencies is expanding. Conventionally, demanding techniques such as angle- and spin-resolved photoemission spectroscopy are required to determine the Rashba parameter αR that characterizes these systems. Here, we introduce a simple method that allows a quantitative extraction of αR, through the analysis of the bilinear response of angle-dependent magnetotransport experiments. This method is based on the modulation of the Rashba-split bands under a rotating in-plane magnetic field. We show that our method is able to correctly yield the value of αR for a wide range of Fermi energies in the 2D electron gas at the LaAlO3/SrTiO3 interface. By applying a gate voltage, we observe a maximum αR in the region of the band structure where interband effects maximize the Rashba effect, consistent with theoretical predictions.

  • Figure
  • Figure
  • Figure
  • Figure
  • Received 23 March 2020
  • Accepted 3 June 2020

DOI:https://doi.org/10.1103/PhysRevMaterials.4.071001

©2020 American Physical Society

Physics Subject Headings (PhySH)

Condensed Matter, Materials & Applied Physics

Authors & Affiliations

D. C. Vaz1,*,†, F. Trier1,*, A. Dyrdał2,*,‡, A. Johansson3, K. Garcia4,5, A. Barthélémy1, I. Mertig3, J. Barnaś2,6, A. Fert1,4,5, and M. Bibes1,§

  • 1Unité Mixte de Physique, CNRS, Thales, Université Paris-Saclay, 91767, Palaiseau, France
  • 2Faculty of Physics, Adam Mickiewicz University in Poznań, Uniwersytetu Poznańskiego 2, 61-614 Poznań, Poland
  • 3Institut für Physik, Martin-Luther-Universität, Halle-Wittenberg, 06099 Halle (Saale), Germany
  • 4CIC nanoGUNE BRTA, Tolosa Hiribidea, 76, E-20018 Donostia - San Sebastián, Spain
  • 5Department of Materials Physics UPV/EHU, Apartado 1072, 20080 Donostia - San Sebastián, Spain
  • 6Institute of Molecular Physics, Polish Academy of Sciences, M. Smoluchowskiego 17, 60-179 Poznań, Poland

  • *These authors contributed equally to this work
  • Current address: CIC nanoGUNE BRTA, Tolosa Hiribidea, 76, E-20018 Donostia - San Sebastian, Spain
  • adyrdal@amu.edu.pl
  • §manuel.bibes@cnrs-thales.fr

Article Text (Subscription Required)

Click to Expand

References (Subscription Required)

Click to Expand
Issue

Vol. 4, Iss. 7 — July 2020

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 Materials

Log In

Cancel
×

Search


Article Lookup

Paste a citation or DOI

Enter a citation
×