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Universal Conductance Fluctuations in a Multi-Subband Quantum-Well
Carmona, H A; Geim, A K; Langerak, C J G M; Foster, T J; Brown, C V; Main, P C; Beaumont, S P
Physica B. 1995;211(1-4):437-439.
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Abstract
We have investigated mesoscopic conductance fluctuations in a GaAs quantum well with five electrically quantised two-dimensional (2D) subbands occupied. The conductance fluctuations occur even in a magnetic field parallel to the plane. We attribute the fluctuations to rapid electron-impurity scattering between different 2D subbands which leads to quasi-3D motion of electrons within the quantum well. We also report for the first time, the angular correlation of the fluctuations as the magnetic field is rotated.
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diffusion; extrinsic conductivity; heterostructures; high magnetic-fields; localization; magnetoresistance; metals
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- Related website <Go to ISI>://A1995RD54400113
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