Coulomb drag of viscous electron fluids: Drag viscosity and negative drag conductivity

[en] We show that Coulomb drag in bilayer systems in the regime of electron hydrodynamics leads to additional viscosity terms in the hydrodynamic equations, the drag, and drag-Hall viscosities, besides the well-known kinematic and Hall viscosities. These additional viscosity terms arise from a change of the stress tensor due to the interlayer Coulomb interactions. All four viscosity terms are tunable by varying the applied magnetic field and the electron densities in the two layers. At certain ratios between the electron densities in the two layers, the drag viscosity dramatically changes the longitudinal transport resulting in a negative drag conductivity.

Disciplines :

Physics

Author, co-author :

HASDEO, Eddwi Hesky ; University of Luxembourg ; Research Center for Quantum Physics, National Research and Innovation Agency, Indonesia

IDRISOV, Edvin ; University of Luxembourg > Faculty of Science, Technology and Medicine > Department of Physics and Materials Science > Team Thomas SCHMIDT ; Abrikosov Center for Theoretical Physics, Institutskii per, MIPT, Dolgoprudnyi, Russia

SCHMIDT, Thomas ; University of Luxembourg > Faculty of Science, Technology and Medicine (FSTM) > Department of Physics and Materials Science (DPHYMS) ; School of Chemical and Physical Sciences, Victoria University of Wellington, Wellington, New Zealand

External co-authors :

Language :

English

Title :

Coulomb drag of viscous electron fluids: Drag viscosity and negative drag conductivity

Publication date :

20 March 2023

Journal title :

Physical Review. B

ISSN :

2469-9950

eISSN :

2469-9969

Publisher :

American Physical Society (APS)

Volume :

107

Issue :

Peer reviewed :

Peer Reviewed verified by ORBi

Additional URL :

https://link.aps.org/article/10.1103/PhysRevB.107.L121107

Funders :

Fonds National de la Recherche Luxembourg

Available on ORBilu :

since 21 November 2023

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