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Orbital effects of a strong in-plane magnetic field on a gate-defined quantum dot

Peter Stano, Chen-Hsuan Hsu, Leon C. Camenzind, Liuqi Yu, Dominik Zumbühl, and Daniel Loss
Phys. Rev. B 99, 085308 – Published 22 February 2019
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Abstract

We theoretically investigate the orbital effects of an in-plane magnetic field on the spectrum of a quantum dot embedded in a two-dimensional electron gas (2DEG). We derive an effective two-dimensional Hamiltonian where these effects enter in proportion to the flux penetrating the 2DEG. We quantify the latter in detail for harmonic, triangular, and square potential of the heterostructure. We show how the orbital effects allow one to extract a wealth of information, for example, on the heterostructure interface, the quantum dot size and orientation, and the spin-orbit fields. We illustrate the formalism by extracting this information from recent measured data [L. C. Camenzind et al., arXiv:1804.00162; Nat. Commun. 9, 3454 (2018)].

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  • Received 31 March 2018
  • Revised 5 February 2019

DOI:https://doi.org/10.1103/PhysRevB.99.085308

©2019 American Physical Society

Physics Subject Headings (PhySH)

Condensed Matter, Materials & Applied Physics

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Key Image

3D Map of a Quantum Dot’s Potential

Published 22 May 2019

A new experimental method provides a way to determine the 3D confining potential of an electron in a quantum dot, allowing improved control over the electron’s spin.

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Authors & Affiliations

Peter Stano1,2,3, Chen-Hsuan Hsu1, Leon C. Camenzind4, Liuqi Yu4, Dominik Zumbühl4, and Daniel Loss1,4

  • 1RIKEN Center for Emergent Matter Science, 2-1 Hirosawa, Wako, Saitama, 351-0198 Japan
  • 2Department of Applied Physics, School of Engineering, University of Tokyo, 7-3-1 Hongo, Bunkyo-ku, Tokyo 113-8656, Japan
  • 3Institute of Physics, Slovak Academy of Sciences, 845 11 Bratislava, Slovakia
  • 4Department of Physics, University of Basel, Klingelbergstrasse 82, CH-4056 Basel, Switzerland

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Issue

Vol. 99, Iss. 8 — 15 February 2019

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