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Nonlocal drag thermoelectricity generated by ferroelectric van der Waals heterostructures

Ping Tang1, Ken-ichi Uchida2,3, and Gerrit E. W. Bauer1,3,4,5,6

  • 1WPI-AIMR, Tohoku University, 2-1-1 Katahira, Sendai 980-8577, Japan
  • 2National Institute for Materials Science, Tsukuba 305-0047, Japan
  • 3Institute for Materials Research, Tohoku University, 2-1-1 Katahira, Sendai 980-8577, Japan
  • 4Center for Spintronics Research Network, Tohoku University, Sendai 980-8577, Japan
  • 5Zernike Institute for Advanced Materials, University of Groningen, 9747 AG Groningen, Netherlands
  • 6Kavli Institute for Theoretical Sciences, University of the Chinese Academy of Sciences, Beijing 10090, China

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Phys. Rev. B 107, L121406 – Published 21 March, 2023

DOI: https://doi.org/10.1103/PhysRevB.107.L121406

Abstract

The “ferron” excitations of the electric-dipolar order carry energy as well as electric dipoles. Here, we predict a nonlocal ferron-drag effect in a ferroelectric on top of a metallic film: An electric current in the conductor generates a heat current in the ferroelectric by long-range charge-dipole interactions. The nonlocal Peltier and its reciprocal Seebeck effect can be controlled by electric gates and detected thermographically. We predict large effects for van der Waals ferroelectric films on graphene.

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Phys. Rev. B 107, L121406– Published 21 March, 2023
  • Received 1 July 2022
  • Revised 19 February 2023
  • Accepted 9 March 2023
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