The shear viscosity of interacting graphene

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

doi:10.48550/arXiv.2310.06829

The shear viscosity of interacting graphene

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

Research output: Working paper › Preprint › Academic

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 sizeable 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
Publisher	arXiv
Pages	1-9
Number of pages	9
DOIs	https://doi.org/10.48550/arXiv.2310.06829
Publication status	Published - 10 Oct 2023

Keywords

cond-mat.str-el
cond-mat.mes-hall

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2310.06829v1Submitted manuscript, 677 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 sizeable 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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AU - Salvo, Emanuele Di

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AB - 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 sizeable 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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The shear viscosity of interacting graphene

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