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Multiple-photon transitions in electrically detected magnetic resonance measurements of 4HSiC transistors

James P. Ashton and Patrick M. Lenahan
Phys. Rev. B 102, 020101(R) – Published 17 July 2020

Abstract

We report an ultralow-field frequency-swept electrically detected magnetic resonance (fsEDMR) measurement scheme sensitive to so-called ultrastrong coupling in paramagnetic systems, which arises from comparatively strong driving fields and weak Zeeman interaction with small static fields. We observe multiple-photon transitions in the EDMR spectrum of a 4H-SiC transistor. The multiphoton transitions are a strong function of the linearly polarized driving field and of the static field. The observation of both field-swept EDMR at a constant frequency and fsEDMR demonstrate that the transitions we observe are caused by multiphoton transitions. In the small static field and large driving-field regime, Bloch-Siegert effects cause small changes to the resonant frequency. We observe these Bloch-Siegert shifts in the resonance frequency in the ultralow-field fsEDMR scheme and verify the observation by also measuring the driving field directly using Faraday's law of induction and a sensing coil. Multiphoton transitions are important for quantum engineering applications.

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  • Received 10 May 2020
  • Revised 29 June 2020
  • Accepted 30 June 2020

DOI:https://doi.org/10.1103/PhysRevB.102.020101

©2020 American Physical Society

Physics Subject Headings (PhySH)

Condensed Matter, Materials & Applied PhysicsQuantum Information, Science & Technology

Authors & Affiliations

James P. Ashton* and Patrick M. Lenahan

  • Department of Engineering Science and Mechanics, The Pennsylvania State University, University Park, Pennsylvania 16802, USA

  • *jamesashton1015@gmail.com

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Issue

Vol. 102, Iss. 2 — 1 July 2020

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