Valley transport driven by dynamic lattice distortion

Yuya Ominato, Daigo Oue, and Mamoru Matsuo
Phys. Rev. B 105, 195409 – Published 6 May 2022

Abstract

Angular momentum conversion between mechanical rotation and the valley degree of freedom in 2D Dirac materials is investigated theoretically. Coupling between the valley and vorticity of dynamic lattice distortions is derived by applying the k·p method to 2D Dirac materials with an inertial effect. Lattice strain effects are also incorporated. Valley transfer and valley-dependent carrier localization are predicted using the dynamic lattice distortions. The transport properties are found to be controllable, allowing the system to be insulating and to generate pulsed charge current. Our formalism offers a route toward mechanical manipulation of valley dynamics in 2D Dirac materials.

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  • Received 19 October 2021
  • Revised 15 April 2022
  • Accepted 27 April 2022

DOI:https://doi.org/10.1103/PhysRevB.105.195409

©2022 American Physical Society

Physics Subject Headings (PhySH)

Condensed Matter, Materials & Applied Physics

Authors & Affiliations

Yuya Ominato1, Daigo Oue1,2, and Mamoru Matsuo1,3,4,5

  • 1Kavli Institute for Theoretical Sciences, University of Chinese Academy of Sciences, Beijing 100190, China
  • 2The Blackett Laboratory, Department of Physics, Imperial College London, Prince Consort Road, Kensington, London SW7 2AZ, United Kingdom
  • 3CAS Center for Excellence in Topological Quantum Computation, University of Chinese Academy of Sciences, Beijing 100190, China
  • 4RIKEN Center for Emergent Matter Science (CEMS), Wako, Saitama 351-0198, Japan
  • 5Advanced Science Research Center, Japan Atomic Energy Agency, Tokai 319-1195, Japan

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Issue

Vol. 105, Iss. 19 — 15 May 2022

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