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Universal conductance fluctuations in a multi-subband quantum well

✍ Scribed by H.A. Carmona; A.K. Geim; C.J.G.M. Langerak; T.J. Foster; C.V. Brown; P.C. Main; S.P. Beaumont

Publisher: Elsevier Science
Year: 1995
Tongue: English
Weight: 253 KB
Volume: 211
Category: Article
ISSN: 0921-4526
DOI: 10.1016/0921-4526(94)01087-h

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✦ Synopsis

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 p~rallei to the plane. We attribute the fluctuations to rapid electron-impurity scattering between different 2D subbands wl~ich 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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