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  • Letter

Magnon-exciton proximity coupling at a van der Waals heterointerface

A. Gloppe1,2,*, M. Onga3, R. Hisatomi2, A. Imamoğlu4, Y. Nakamura2,5, Y. Iwasa3,6,†, and K. Usami2,‡

  • 1Université de Strasbourg, CNRS, Institut de Physique et Chimie des Matériaux de Strasbourg (IPCMS), UMR 7504, F-67000 Strasbourg, France
  • 2Research Center for Advanced Science and Technology (RCAST), The University of Tokyo, Meguro-ku, Tokyo 153-8904, Japan
  • 3Quantum-Phase Electronics Center (QPEC) and Department of Applied Physics, The University of Tokyo, Tokyo 113-8656, Japan
  • 4Institute for Quantum Electronics, ETH Zurich, CH-8093 Zurich, Switzerland
  • 5RIKEN Center for Quantum Computing (RQC), Wako, Saitama 351-0198, Japan
  • 6RIKEN Center for Emergent Matter Science (CEMS), Wako, Saitama 351-0198, Japan

  • *arnaud.gloppe@ipcms.unistra.fr
  • †iwasa@ap.t.u-tokyo.ac.jp
  • ‡usami@qc.rcast.u-tokyo.ac.jp
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Phys. Rev. B 105, L121403 – Published 7 March, 2022

DOI: https://doi.org/10.1103/PhysRevB.105.L121403

Abstract

We report on an optically probed ferromagnetic resonance experiment which elucidates the magnon-exciton coupling at the interface between a magnetic thin film and an atomically thin semiconductor. Our approach allies the long-lived magnons hosted in a film of yttrium iron garnet (YIG) to strongly bound excitons in a flake of a transition metal dichalcogenide, MoSe2. The magnons induce on the excitons a dynamical valley Zeeman effect ruled by interfacial exchange interactions. This nascent class of hybrid system suggests new opportunities for information transduction between microwave and optical regions.

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Phys. Rev. B 105, L121403– Published 7 March, 2022
  • Received 23 September 2021
  • Revised 27 January 2022
  • Accepted 1 February 2022
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