The Influence of Impurities on the Shubnikov-De Haas and Hall Resistance of Two-Dimensional Electron Gases in GaAs/AlxGa1-xas Heterostructures Investigated by Back-Gating and Persistent Photoconductivity
It is well-known that in the Quantum-Hall (QH) regime the Shubnikov-de Haas (SdH) oscillations and the Hall resistance show a non-ohmic behaviour, which apparently is spin-dependent. We report on new measurements on this effect, which have been carried out with the help of a back-gate and by the use of the effect of persistent photoconductivity induced by light of out-gap energy.
KeywordsEffective Mass Landau Level Current Dependence Hall Resistance Persistent Photoconductivity
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