Frequency anomaly in the Rashba-effect induced magnetization oscillations of a high-mobility two-dimensional electron system

B. Rupprecht, S. Heedt, H. Hardtdegen, Th. Schäpers, Ch. Heyn, M. A. Wilde, and D. Grundler
Phys. Rev. B 87, 035307 – Published 16 January 2013

Abstract

With the direct measurement of the quantum oscillatory magnetization M of a two-dimensional electron system (2DES) in an InGaAs/InP asymmetric quantum well we discover a frequency anomaly of the de Haas–van Alphen effect which is not consistent with existing theories on spin-orbit interaction (SOI). Strikingly, the oscillatory magnetoresistance of the same heterostructure, that is, the Shubnikov–de Haas effect conventionally used to explore SOI, does not show the frequency anomaly. This explains why our finding has not been reported for almost three decades. The understanding of the ground state energy of a 2DES is evidenced to be incomplete when SOI is present.

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  • Received 22 December 2010

DOI:https://doi.org/10.1103/PhysRevB.87.035307

©2013 American Physical Society

Authors & Affiliations

B. Rupprecht1, S. Heedt2, H. Hardtdegen2, Th. Schäpers2, Ch. Heyn3, M. A. Wilde1,*, and D. Grundler1

  • 1Lehrstuhl für Physik funktionaler Schichtsysteme, Technische Universität München, Physik Department, James-Franck-Strasse 1, D-85747 Garching b. München, Germany
  • 2Peter Grünberg Institut (PGI-9) and JARA-FIT Jülich-Aachen Research Alliance, Forschungszentrum Jülich, D–52425 Jülich, Germany
  • 3Institut für Angewandte Physik und Zentrum für Mikrostrukturforschung, Universität Hamburg, D-20355 Hamburg, Germany

  • *mwilde@ph.tum.de

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Vol. 87, Iss. 3 — 15 January 2013

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