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Non-Fermi Liquids in Conducting Two-Dimensional Networks

Jongjun M. Lee, Masaki Oshikawa, and Gil Young Cho
Phys. Rev. Lett. 126, 186601 – Published 6 May 2021
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Abstract

We explore the physics of novel fermion liquids emerging from conducting networks, where 1D metallic wires form a periodic 2D superstructure. Such structure naturally appears in marginally twisted bilayer graphenes, moire transition metal dichalcogenides, and also in some charge-density wave materials. For these network systems, we theoretically show that a remarkably wide variety of new non-Fermi liquids emerge and that these non-Fermi liquids can be classified by the characteristics of the junctions in networks. Using this, we calculate the electric conductivity of the non-Fermi liquids as a function of temperature, which show markedly different scaling behaviors than a regular 2D Fermi liquid.

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  • Received 1 October 2020
  • Accepted 1 April 2021

DOI:https://doi.org/10.1103/PhysRevLett.126.186601

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.

© 2021 American Physical Society

Physics Subject Headings (PhySH)

Condensed Matter, Materials & Applied Physics

Authors & Affiliations

Jongjun M. Lee1,5,*, Masaki Oshikawa2,3,4,†, and Gil Young Cho1,5,‡

  • 1Department of Physics, Pohang University of Science and Technology (POSTECH), Pohang 37673, Republic of Korea
  • 2Institute for Solid State Physics, The University of Tokyo, Kashiwa 277-8581, Japan
  • 3Kavli Institute for the Physics and Mathematics of the Universe, Kashiwa 277-8583, Japan
  • 4Trans-scale Quantum Science Institute, University of Tokyo, Bunkyo-ku, Tokyo 113-0033, Japan
  • 5Center for Artificial Low Dimensional Electronic Systems, Institute for Basic Science (IBS), Pohang 37673, Korea

  • *michaelj.lee@postech.ac.kr
  • oshikawa@issp.u-tokyo.ac.jp
  • gilyoungcho@postech.ac.kr

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Issue

Vol. 126, Iss. 18 — 7 May 2021

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