Shear viscosity of interacting graphene

Kitinan Pongsangangan; Pedro Cosme; Emanuele Di Salvo; Lars Fritz

doi:10.1103/PhysRevB.110.045443

Shear viscosity of interacting graphene

Kitinan Pongsangangan, Pedro Cosme, Emanuele Di Salvo, Lars Fritz

Sub Condensed-Matter Theory, Statistical and Computational Physics

Research output: Contribution to journal › Article › Academic › peer-review

Abstract

One of the hallmark properties of fluids is their shear viscosity which is, among other things, responsible for parabolic flow profiles through narrow channels. In recent years, there has been a growing number of observations of said flow profiles in electronic transport measurements in a variety of material systems, most notably in graphene. In this paper, we investigate the shear viscosity of interacting graphene from a theoretical point of view. We study both a phenomenological as well as a microscopic model and find excellent agreement between the two. Our main finding is collective modes make a sizable contribution to the viscosity that can equal or even outweigh the electronic contribution that is usually assumed dominant. We comment on how this finding carries over to systems beyond graphene and related Dirac materials.

Original language	English
Article number	045443
Pages (from-to)	1-7
Number of pages	7
Journal	Physical Review B
Volume	110
Issue number	4
DOIs	https://doi.org/10.1103/PhysRevB.110.045443
Publication status	Published - 15 Jul 2024

Bibliographical note

Publisher Copyright:
© 2024 American Physical Society.

Funding

K.P. and L.F. acknowledge former collaborations and discussions with H. T. C. Stoof, T. Ludwig, S. Grubinskas, R. A. Duine, E. I. Kiselev, A. Lucas, J. Lux, A. Mitchell, M. M\u00FCller, A. Rosch, S. Sachdev, J. Schmalian, H. Teras, M. Vojta, G. Wagner, T. Meng, and J. Waissman. K.P. thanks the Institute for the Promotion of Teaching Science and Technology (IPST) of Thailand for support from a Ph.D. scholarship. One of the authors (P.C.) acknowledges the funding provided by Funda\u00E7\u00E3o para a Ci\u00EAncia e a Tecnologia (FCT-Portugal) through Grant No. PD/BD/150415/2019 and Project No. PTDC/FIS-OUT/3882/2020. This work is part of the D-ITP consortium, a program of the Netherlands Organisation for Scientific Research (NWO) that is funded by the Dutch Ministry of Education, Culture and Science (OCW).

Funders	Funder number
Fundação para a Ciência e a Tecnologia
Nederlandse Organisatie voor Wetenschappelijk Onderzoek
IPST
OCW
Institute for the Promotion of Teaching Science and Technology
NWO
Ministerie van onderwijs, cultuur en wetenschap
FCT-Portugal	PD/BD/150415/2019, PTDC/FIS-OUT/3882/2020

Keywords

Collective description
Electron interactions
Flow
Quantum
Transport

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PhysRevB.110.045443Final published version, 484 KB

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abstract = "One of the hallmark properties of fluids is their shear viscosity which is, among other things, responsible for parabolic flow profiles through narrow channels. In recent years, there has been a growing number of observations of said flow profiles in electronic transport measurements in a variety of material systems, most notably in graphene. In this paper, we investigate the shear viscosity of interacting graphene from a theoretical point of view. We study both a phenomenological as well as a microscopic model and find excellent agreement between the two. Our main finding is collective modes make a sizable contribution to the viscosity that can equal or even outweigh the electronic contribution that is usually assumed dominant. We comment on how this finding carries over to systems beyond graphene and related Dirac materials.",

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Shear viscosity of interacting graphene

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Keywords

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