Quantum transport in diffusive microstructures in high magnetic fields |
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| Affiliation: | 1. Department of Mechanical, Materials and Manufacturing Engineering, University of Nottingham Ningbo China, Ningbo, China;2. Research Group for Fluids and Thermal Engineering, University of Nottingham Ningbo China, Ningbo, China;3. Nottingham Ningbo China Beacons of Excellence Research and Innovation Institute, Ningbo, China;4. Department of Electrical and Electronic Engineering, University of Nottingham Ningbo China, Ningbo, China;5. Research Group for Fluids and Thermal Engineering, University of Nottingham, Nottingham, UK;6. Key Laboratory of Carbonaceous Wastes Processing and Process Intensification Research of Zhejiang Province, University of Nottingham Ningbo China, Ningbo, China |
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| Abstract: | We have studied magnetotransport in diffusive submicron wires (n+-GaAs) at high magnetic fields where ωcτ>1. The system allowed us to follow a transition from orthodox mesoscopic behaviour to the regime of edge state transport.We found that for ωcτ>1 the universal conductance fluctuations (UCF) can no longer be scaled in terms of only one parameter, the phase coherence length. This breakdown of universal scaling is seen as a large increase of the Lee-Stone correlation field while the magnitude of UCF is unchanged in strong disagreement with the theoretical prediction.A qualitatively new magnetoresistance oscillatory effect has been observed at intermediate temperatures (10K
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