Marginal Fermi Liquid in Twisted Bilayer Graphene

6 pags., 4 figs.

Bibliographic Details
Authors: González Carmona, José, Stauber, Tobias
Format: article
Status:Published version
Publication Date:2020
Country:España
Institution:Consejo Superior de Investigaciones Científicas (CSIC)
Repository:DIGITAL.CSIC. Repositorio Institucional del CSIC
OAI Identifier:oai:digital.csic.es:10261/227250
Online Access:http://hdl.handle.net/10261/227250
Access Level:Open access
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spelling Marginal Fermi Liquid in Twisted Bilayer GrapheneGonzález Carmona, JoséStauber, Tobias6 pags., 4 figs.Linear resistivity at low temperatures is a prominent feature of high-Tc superconductors which has also been found recently in twisted bilayer graphene. We show that due to an extended van Hove singularity (VHS), the T-linear resistivity can be obtained from a microscopic tight-binding model for filling factors close to the VHS. The linear behavior is shown to be related to the linear energy dependence of the electron quasiparticle decay rate which implies the low-energy logarithmic attenuation of the quasiparticle weight. These are distinctive features of a marginal Fermi liquid, which we also see reflected in the respective lowerature logarithmic corrections of the heat capacity and the thermal conductivity, leading to the consequent violation of the Wiedemann-Franz law. We also show that there is a crossover at T∼6 K from the marginal Fermi liquid regime to a regime dominated by excitations on the Dirac cone right above the VHS that also yields a linear resistivity albeit with smaller slope, in agreement with experimental observations.This work has been supported by Spain’s MINECO under Grant No. FIS2017-82260-P as well as by the CSIC Research Platform on Quantum Technologies PTI-001.American Physical SocietyMinisterio de Economía y Competitividad (España)Consejo Superior de Investigaciones Científicas (España)Consejo Superior de Investigaciones Científicas [https://ror.org/02gfc7t72]2021202120202021info:eu-repo/semantics/articlehttp://purl.org/coar/resource_type/c_6501Publisher's versioninfo:eu-repo/semantics/publishedVersionhttp://hdl.handle.net/10261/227250reponame:DIGITAL.CSIC. Repositorio Institucional del CSICinstname:Consejo Superior de Investigaciones Científicas (CSIC)Inglés#PLACEHOLDER_PARENT_METADATA_VALUE#info:eu-repo/grantAgreement/MINECO/Plan Estatal de Investigación Científica y Técnica y de Innovación 2013-2016/FIS2017-82260-Phttp://dx.doi.org/10.1103/PhysRevLett.124.186801Síinfo:eu-repo/semantics/openAccessoai:digital.csic.es:10261/2272502026-05-22T06:33:51Z
dc.title.none.fl_str_mv Marginal Fermi Liquid in Twisted Bilayer Graphene
title Marginal Fermi Liquid in Twisted Bilayer Graphene
spellingShingle Marginal Fermi Liquid in Twisted Bilayer Graphene
González Carmona, José
title_short Marginal Fermi Liquid in Twisted Bilayer Graphene
title_full Marginal Fermi Liquid in Twisted Bilayer Graphene
title_fullStr Marginal Fermi Liquid in Twisted Bilayer Graphene
title_full_unstemmed Marginal Fermi Liquid in Twisted Bilayer Graphene
title_sort Marginal Fermi Liquid in Twisted Bilayer Graphene
dc.creator.none.fl_str_mv González Carmona, José
Stauber, Tobias
author González Carmona, José
author_facet González Carmona, José
Stauber, Tobias
author_role author
author2 Stauber, Tobias
author2_role author
dc.contributor.none.fl_str_mv Ministerio de Economía y Competitividad (España)
Consejo Superior de Investigaciones Científicas (España)
Consejo Superior de Investigaciones Científicas [https://ror.org/02gfc7t72]
description 6 pags., 4 figs.
publishDate 2020
dc.date.none.fl_str_mv 2020
2021
2021
2021
dc.type.none.fl_str_mv info:eu-repo/semantics/article
http://purl.org/coar/resource_type/c_6501
Publisher's version
info:eu-repo/semantics/publishedVersion
format article
status_str publishedVersion
dc.identifier.none.fl_str_mv http://hdl.handle.net/10261/227250
url http://hdl.handle.net/10261/227250
dc.language.none.fl_str_mv Inglés
language_invalid_str_mv Inglés
dc.relation.none.fl_str_mv #PLACEHOLDER_PARENT_METADATA_VALUE#
info:eu-repo/grantAgreement/MINECO/Plan Estatal de Investigación Científica y Técnica y de Innovación 2013-2016/FIS2017-82260-P
http://dx.doi.org/10.1103/PhysRevLett.124.186801
Sí
dc.rights.none.fl_str_mv info:eu-repo/semantics/openAccess
eu_rights_str_mv openAccess
dc.publisher.none.fl_str_mv American Physical Society
publisher.none.fl_str_mv American Physical Society
dc.source.none.fl_str_mv reponame:DIGITAL.CSIC. Repositorio Institucional del CSIC
instname:Consejo Superior de Investigaciones Científicas (CSIC)
instname_str Consejo Superior de Investigaciones Científicas (CSIC)
reponame_str DIGITAL.CSIC. Repositorio Institucional del CSIC
collection DIGITAL.CSIC. Repositorio Institucional del CSIC
repository.name.fl_str_mv
repository.mail.fl_str_mv
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