Vanishing Zeeman energy in a two-dimensional hole gas

P. Del Vecchio, M. Lodari, A. Sammak, G. Scappucci, and O. Moutanabbir
Phys. Rev. B 102, 115304 – Published 17 September 2020

Abstract

A clear signature of Zeeman split states crossing is observed in a Landau fan diagram of strained germanium two-dimensional hole gas. The underlying mechanisms are discussed based on a perturbative model yielding a closed formula for the critical magnetic fields. These fields depend strongly on the energy difference between the topmost and neighboring valence bands and are sensitive to the quantum well thickness, strain, and spin-orbit interaction. The latter is a necessary feature for the crossing to occur. This framework enables a straightforward quantification of the hole-state parameters from simple measurements, thus paving the way for its use in design and modeling of hole-based quantum devices.

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  • Received 11 June 2020
  • Revised 29 August 2020
  • Accepted 31 August 2020

DOI:https://doi.org/10.1103/PhysRevB.102.115304

©2020 American Physical Society

Physics Subject Headings (PhySH)

Condensed Matter, Materials & Applied Physics

Authors & Affiliations

P. Del Vecchio1,*, M. Lodari2,*, A. Sammak3, G. Scappucci2,†, and O. Moutanabbir1,‡

  • 1Department of Engineering Physics, École Polytechnique de Montréal, Montréal, Case Postale 6079, Succursale Centre-Ville, Montréal, Québec, Canada H3C 3A7
  • 2QuTech and Kavli Institute of Nanoscience, TU Delft, P.O. Box 5046, 2600 GA Delft, Netherlands
  • 3QuTech and Netherlands Organisation for Applied Scientific Research, Stieltjesweg 1, 2628 CK Delft, Netherlands

  • *These authors contributed equally to this work.
  • g.scappucci@tudelft.nl
  • oussama.moutanabbir@polymtl.ca

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Issue

Vol. 102, Iss. 11 — 15 September 2020

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