Viscous magnetotransport and Gurzhi effect in bilayer electron system

Abstract

We observe a large negative magnetoresistance and a decrease of resistivity with increasing temperature, known as the Gurzhi effect, in a bilayer electron (BL) system formed by a wide GaAs quantum well. A hydrodynamic model for the single fluid transport parameters in narrow channels is employed and successfully describes our experimental findings. We find that the electron-electron scattering in the bilayer is more intensive in comparison with a single-band well (SW). The hydrodynamic assumption implies a strong dependence on boundary conditions, which can be characterized by slip length, describing the behavior of a liquid near the edge. Our results reveal that slip length in a BL is shorter than in a SW, and that the BL system goes deeper into the hydrodynamic regime. This is in agreement with the model proposed where the slip length is of the order of the electron-electron mean free path.

8 pages, 8 figures

References in corpus (13)

• Hydrodynamics of electrons in graphene
• Hydrodynamics in graphene: Linear-response transport
• Non-local transport and the Hall viscosity of 2D hydrodynamic electron liquids
• Electron hydrodynamics dilemma: whirlpools or no whirlpools
• Transport signatures of Hall viscosity
• Colossal negative magnetoresistance in a 2D electron gas
• Microwave zero-resistance states in a bilayer electron system
• Stokes paradox in electronic Fermi liquids
• Resonance oscillations of magnetoresistance in double quantum wells
• Kinetic theory of transport for inhomogeneous electron fluids
• Dissipative and Hall viscosity of a disordered 2D electron gas
• Viscous magnetoresistance of correlated electron liquids
• Manifestations of classical size effect and electronic viscosity in the magnetoresistance of narrow two-dimensional conductors: Theory and experiment

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