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Nonlocal Magnetoresistance at the Crossover between the Classical and Quantum Transport Regimes
Geim, A K; Main, P C; Beton, P H; Streda, P; Eaves, L; Wilkinson, C D W; Beaumont, S P
Surface Science. 1992;263(1-3):298-302.
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Abstract
A new type of non-local oscillatory magnetoresistance effect is observed in heavily-doped n+-GaAs wires over a limited range of temperature (10 less-than-or-equal-to T less-than-or-equal-to 50 K) and at magnetic fields sufficiently large to give rise to Landau quantisation. The effect is observed when quantum ballistic transport along the edges coexists with diffusive and dissipative conduction in the bulk. In a similar range of magnetic field, universal conductance fluctuations observed in the wires cannot be explained by current theory.
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conductors; edge states; fluctuations; resistance; systems; wire
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