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Thermoelectric response in two-dimensional Dirac systems: Role of particle-hole pairs

Kitinan Pongsangangan, Simonas Grubinskas, and Lars Fritz

  • Institute for Theoretical Physics, Utrecht University, 3584 CE Utrecht, Netherlands

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Phys. Rev. Research 4, 043107 – Published 15 November, 2022

DOI: https://doi.org/10.1103/PhysRevResearch.4.043107

Abstract

Clean two-dimensional Dirac systems have received a great deal of attention for being a prime candidate to observe hydrodynamical transport behavior in interacting electronic systems. This is mostly due to recent advances in the preparation of ultrapure samples with sufficiently strong interactions. In this paper we investigate the role of collective modes in the thermoelectric transport properties of those systems. We find that dynamical particle-hole pairs, plasmons, make a sizable contribution to the thermal conductivity. While the increase at the Dirac point is moderate, it becomes large towards larger doping. We suspect that this is a generic feature of ultraclean two-dimensional electronic systems, also applicable to degenerate systems.

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See Also

Hydrodynamics of charged two-dimensional Dirac systems. I. Thermoelectric transport

Kitinan Pongsangangan, T. Ludwig, H. T. C. Stoof, and Lars Fritz
Phys. Rev. B 106, 205126 (2022)

Hydrodynamics of charged Dirac electrons in two dimensions. II. Role of collective modes

Kitinan Pongsangangan, Tim Ludwig, Henk T. C. Stoof, and Lars Fritz
Phys. Rev. B 106, 205127 (2022)

Article Text

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Phys. Rev. Research 4, 043107– Published 15 November, 2022
  • Received 15 May 2022
  • Revised 25 August 2022
  • Accepted 11 October 2022
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Published by the American Physical Society under the terms of the Creative Commons Attribution 4.0 International license. Further distribution of this work must maintain attribution to the author(s) and the published article's title, journal citation, and DOI.

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