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"Domain-wall-induced electromagnons in magnetoelectric materials".

ORAL

Abstract

Amongst the properties of multiferroic materials, magnetoelectric coupling, which provides a handle for controlling electrical dipole moments by applying magnetic fields (or magnetic moments by electric fields), is promising for the design of novel sensors and data storage media with lower power consumption and higher efficiency. In addition, the potential provided by the existence of electromagnons together with the topological defects such as domain walls opens the opportunity of enhancing the magnetoelectric response as well as creating electrically-driven configurable magnonic circuits. In this work, the observation of dynamical couplings between magnons and optical phonons in systems possessing ferroelectric domains is reported which leads to emergence of new hybrid quasi-particles, namely domain-wall-induced electromagnons and induces THz resonances in magnetoelectric responses. Such quasi-particles are preferentially localized either near the domain walls or near the middle of domains due to scatterings. As a result, larger magnetoelectric conversion is acquired that can be exploited to design more reliable and ultrafast magnetoelectric devices with less energy consumption.

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Publication: Domain-wall-induced electromagnons in multiferroics

Presenters

  • S. Omid Sayedaghaee

    University of Arkansas

Authors

  • S. Omid Sayedaghaee

    University of Arkansas

  • Charles Paillard

    Laboratoire Structures, Propriétés et Modélisation des Solides, CentraleSupélec, CNRS UMR 580, Université Paris-Saclay, 91190 Gif-sur-Yvette, France, University Paris-Saclay, SPMS Centrale Supelec Université Paris Saclay

  • Sergey Prosandeev1

    Physics Department and Institute for Nanoscience and Engineering, University of Arkansas, Fayetteville, Arkansas 72701, USA

  • Bin Xu

    School of Physical Science and Technology, Soochow University, Suzhou, Jiangsu 215006, China, Soochow University, China, Soochow University, School of Physical Science and Technology, Soochow University, Suzhou, China

  • Sergei Prokhorenko

    Physics Department and Institute for Nanoscience and Engineering, University of Arkansas, Fayetteville, Arkansas 72701, USA, University of Arkansas

  • Yousra Nahas

    Physics Department and Institute for Nanoscience and Engineering, University of Arkansas, Fayetteville, Arkansas 72701, USA, University of Arkansas

  • Laurent Bellaiche

    Physics Department and Institute for Nanoscience and Engineering, University of Arkansas, Fayetteville, Arkansas 72701, USA, University of Arkansas