Landau-Zener-Stückelberg-Majorana Interferometry of a Single Hole

Alex Bogan, Sergei Studenikin, Marek Korkusinski, Louis Gaudreau, Piotr Zawadzki, Andy S. Sachrajda, Lisa Tracy, John Reno, and Terry Hargett
Phys. Rev. Lett. 120, 207701 – Published 18 May 2018
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Abstract

We perform Landau-Zener-Stückelberg-Majorana (LZSM) spectroscopy on a system with strong spin-orbit interaction (SOI), realized as a single hole confined in a gated double quantum dot. Analogous to electron systems, at a magnetic field B=0 and high modulation frequencies, we observe photon-assisted tunneling between dots, which smoothly evolves into the typical LZSM funnel-shaped interference pattern as the frequency is decreased. In contrast to electrons, the SOI enables an additional, efficient spin-flip interdot tunneling channel, introducing a distinct interference pattern at finite B. Magnetotransport spectra at low-frequency LZSM driving show the two channels to be equally coherent. High-frequency LZSM driving reveals complex photon-assisted tunneling pathways, both spin conserving and spin flip, which form closed loops at critical magnetic fields. In one such loop, an arbitrary hole spin state is inverted, opening the way toward its all-electrical manipulation.

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  • Received 3 November 2017

DOI:https://doi.org/10.1103/PhysRevLett.120.207701

© 2018 American Physical Society

Physics Subject Headings (PhySH)

Condensed Matter, Materials & Applied Physics

Authors & Affiliations

Alex Bogan, Sergei Studenikin*, Marek Korkusinski, Louis Gaudreau, Piotr Zawadzki, and Andy S. Sachrajda

  • Emerging Technology Division, National Research Council, Ottawa, Canada K1A0R6

Lisa Tracy

  • Sandia National Laboratories, Albuquerque, New Mexico 87185, USA

John Reno and Terry Hargett

  • Center for Integrated Nanotechnologies, Sandia National Laboratories, Albuquerque, New Mexico 87185, USA

  • *Corresponding author. sergei.studenikin@nrc.ca
  • Corresponding author. andy.sachrajda@nrc.ca

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Issue

Vol. 120, Iss. 20 — 18 May 2018

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