Hydrodynamic and Ballistic Transport over Large Length Scales in GaAs/AlGaAs

We study hydrodynamic and ballistic transport regimes through nonlocal resistance measurements and high-resolution kinetic simulations in a mesoscopic structure on a high-mobility two-dimensional electron system in a GaAs/AlGaAs heterostructure. We evince the existence of collective transport phenom...

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Bibliographic Details
Published in:Physical review letters 2021-02, Vol.126 (7), p.076803-076803, Article 076803
Main Authors: Gupta, Adbhut, Heremans, J J, Kataria, Gitansh, Chandra, Mani, Fallahi, S, Gardner, G C, Manfra, M J
Format: Article
Language:English
Subjects:
Aluminum gallium arsenides
ballistic transport
CONDENSED MATTER PHYSICS, SUPERCONDUCTIVITY AND SUPERFLUIDITY
Heterostructures
III-V semiconductors
Mesoscopic physics
Transport phenomena
transport techniques
two-dimensional electron gas
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Summary:We study hydrodynamic and ballistic transport regimes through nonlocal resistance measurements and high-resolution kinetic simulations in a mesoscopic structure on a high-mobility two-dimensional electron system in a GaAs/AlGaAs heterostructure. We evince the existence of collective transport phenomena in both regimes and demonstrate that negative nonlocal resistances and current vortices are not exclusive to only the hydrodynamic regime. The combined experiments and simulations highlight the importance of device design, measurement schemes, and one-to-one modeling of experimental devices to demarcate various transport regimes.
ISSN:0031-9007
1079-7114
DOI:10.1103/PhysRevLett.126.076803