Phys. Rev. B 98, 024424 (2018) - High figure of merit magneto-optics from interfacial skyrmions on topological insulators

High figure of merit magneto-optics from interfacial skyrmions on topological insulators

Tonmoy K. Bhowmick, Amrit De, and Roger K. Lake

Phys. Rev. B 98, 024424 – Published 25 July 2018; Erratum Phys. Rev. B 101, 209902 (2020)

Abstract

In the Kerr rotation geometry, magneto-optic memory devices typically suffer from low figure-of-merit (FOM) and long write times. We show that skyrmions formed at the interface of a thin-film multiferroic and a topological insulator can give rise to high FOM magneto-optic Kerr effects (MOKEs). Huge differential MOKE can arise in parts of the phase diagram. Resonancelike features in the MOKE spectra arising from the induced low energy TI band gap, the multiferroic-film thickness, and the high energy Drude-like behavior are resolved and explained. The Fermi level dependence of the MOKE signatures is distinct for the different magnetic textures. This has broad implications for magnetic texture characterization, electro-optic modulators and isolators, and high density magnetic optic memory.

Received 9 May 2018

DOI:https://doi.org/10.1103/PhysRevB.98.024424

©2018 American Physical Society

Physics Subject Headings (PhySH)

Condensed Matter, Materials & Applied Physics

Erratum

Erratum: High figure of merit magneto-optics from interfacial skyrmions on topological insulators [Phys. Rev. B 98, 024424 (2018)]

Tonmoy K. Bhowmick, Amrit De, and Roger K. Lake

Phys. Rev. B 101, 209902 (2020)

Authors & Affiliations

Tonmoy K. Bhowmick^*,†, Amrit De^*,‡, and Roger K. Lake^§

Department of Electrical Engineering, University of California, Riverside, California 92521, USA

^*These authors contributed equally to this work.
^†tbhow001@ucr.edu
^‡amritde@gmail.com
^§rlake@ece.ucr.edu

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Issue

Vol. 98, Iss. 2 — 1 July 2018

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