Research output: Contribution to journal › Article › peer-review
Obstacle-induced Gurzhi effect and hydrodynamic electron flow in two-dimensional systems. / Levin, A. D.; Gusev, G. M.; Chitta, V. A. et al.
In: Physical Review B, Vol. 111, No. 12, 125302, 06.03.2025.Research output: Contribution to journal › Article › peer-review
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TY - JOUR
T1 - Obstacle-induced Gurzhi effect and hydrodynamic electron flow in two-dimensional systems
AU - Levin, A. D.
AU - Gusev, G. M.
AU - Chitta, V. A.
AU - Kvon, Z. D.
AU - Jaroshevich, A. S.
AU - Utkin, D. E.
AU - Dmitriev, D. V.
AU - Bakarov, A. K.
N1 - Финансирующий спонсор Номер финансирования Акроним Conselho Nacional de Desenvolvimento Científico e Tecnológico CNPq Advanced Technology Research Council ATRC Fundação de Amparo à Pesquisa do Estado de São Paulo 2021/12470-8,2024/06755-8,2019/16736-2 FAPESP Russian Science Foundation 23-72-30003,19-72-30023 RSF
PY - 2025/3/6
Y1 - 2025/3/6
N2 - he viscous flow of electrons in a narrow channel requires both strong electron-electron interactions and no-slip boundary conditions. However, introducing obstacles within the liquid can significantly increase flow resistance and, as a result, amplify the effects of viscosity. Even in samples with smooth walls, the presence of an obstacle can strongly alter electron behavior, leading to pronounced hydrodynamic effects. We investigated transport in mesoscopic samples containing a disordered array of obstacles. In contrast to samples without obstacles, which do not show a decrease in resistivity with rising temperature, samples with obstacles exhibit a significant resistivity reduction as the temperature increases (the Gurzhi effect). By measuring the negative magnetoresistance, we extracted shear viscosity and other parameters through comparison with theoretical predictions. Consequently, narrow-channel samples with a disordered obstacle array provide a valuable platform for studying hydrodynamic electron flow independently of boundary conditions.
AB - he viscous flow of electrons in a narrow channel requires both strong electron-electron interactions and no-slip boundary conditions. However, introducing obstacles within the liquid can significantly increase flow resistance and, as a result, amplify the effects of viscosity. Even in samples with smooth walls, the presence of an obstacle can strongly alter electron behavior, leading to pronounced hydrodynamic effects. We investigated transport in mesoscopic samples containing a disordered array of obstacles. In contrast to samples without obstacles, which do not show a decrease in resistivity with rising temperature, samples with obstacles exhibit a significant resistivity reduction as the temperature increases (the Gurzhi effect). By measuring the negative magnetoresistance, we extracted shear viscosity and other parameters through comparison with theoretical predictions. Consequently, narrow-channel samples with a disordered obstacle array provide a valuable platform for studying hydrodynamic electron flow independently of boundary conditions.
UR - https://www.mendeley.com/catalogue/c149f25e-72cd-3855-8387-f82a74b21462/
UR - https://www.scopus.com/record/display.uri?eid=2-s2.0-86000289091&origin=inward&txGid=42daefa99f6651ed716e7abf13d53a52
U2 - 10.1103/PhysRevB.111.125302
DO - 10.1103/PhysRevB.111.125302
M3 - Article
VL - 111
JO - Physical Review B
JF - Physical Review B
SN - 2469-9950
IS - 12
M1 - 125302
ER -
ID: 65024921