Temperature Dependence of Electron Viscosity in Superballistic GaAs Point Contacts
arXiv:2405.09097 · doi:10.1103/PhysRevLett.134.026302
Abstract
Electron transport in suspended and non-suspended GaAs point contacts (PCs) of different widths is experimentally studied. The superballistic contribution to the conductance, that demonstrates a distinctive quadratic dependence on the PC width and temperature growth, is extracted from the experiment. The studied PCs are shown to be described in the framework of hydrodynamic electron flow a in wide temperature range. At low temperatures, , the viscosity is found out to obey the law expected for 2D systems, while at higher temperatures it has the dependence . Similar measurements performed after the suspension of PCs, i.e. their separation from substrate, show that the electron viscosity reduces in the whole temperature range, that indicates an enhanced electron-electron interaction in suspended structures.
arXiv comment7 pages, 4 figures
References in corpus (29)
- Negative local resistance caused by viscous electron backflow in graphene
- Superballistic flow of viscous electron fluid through graphene constrictions
- Electron Viscosity, Current Vortices and Negative Nonlocal Resistance in Graphene
- Hydrodynamic electron flow in high-mobility wires
- Non-local transport and the hydrodynamic shear viscosity in graphene
- Hydrodynamic description of transport in strongly correlated electron systems
- Higher-Than-Ballistic Conduction of Viscous Electron Flows
- Negative magnetoresistance in viscous flow of two-dimensional electrons
- All-Electric Quantum Point Contact Spin Valve
- Hydrodynamics in graphene: Linear-response transport
- Ballistic miniband conduction in a graphene superlattice
- Bulk and shear viscosities of the 2D electron liquid in a doped graphene sheet
- Wigner crystal physics in quantum wires
- Viscous electron fluids
- Spin Properties of Low Density One-Dimensional Wires
- Viscous electron flow in mesoscopic two-dimensional electron gas
- Hydrodynamic approach to two-dimensional electron systems
- Geometric control of universal hydrodynamic flow in a two dimensional electron fluid
- Electronic hydrodynamics and the breakdown of the Wiedemann-Franz and Mott laws in interacting metals
- Magnetohydrodynamics in graphene: shear and Hall viscosities
- Viscosity of two-dimensional electrons
- Stokes flow around an obstacle in viscous two-dimensional electron liquid
- Minibands in twisted bilayer graphene probed by magnetic focusing
- Imaging the zigzag Wigner crystal in confinement-tunable quantum wires
- Manifestations of classical size effect and electronic viscosity in the magnetoresistance of narrow two-dimensional conductors: Theory and experiment
- Superballistic electron flow through a point contact in a Ga[Al]As heterostructure
- Effects of Electron-Electron Scattering in Wide Ballistic Microcontacts
- Influence of e-e scattering on the temperature dependence of the resistance of a classical ballistic point contact in a two-dimensional electron system
- Long distance electron-electron scattering detected with point contacts
Cited by in corpus (5)
- Slip electron flow in GaAs microscale constrictions
- Superballistic paradox in electron fluids: Evidence of tomographic transport
- Giant Shubnikov-de Haas Oscillations with V-Shaped Minima in a High-Mobility Two-Dimensional Electron Gas: Experiment and Phenomenological Model
- Electron viscosity and device-dependent variability in four-probe electrical transport in ultra-clean graphene field-effect transistors
- How to accurately measure the mobility and viscosity of two-dimensional carriers?