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- W1995517557 abstract "In the present paper we investigate the influence of the contact region on the distribution of the chemical potential in integer quantum Hall samples as well as the longitudinal and Hall resistance as a function of the magnetic field. First we use a standard quantum Hall sample geometry and analyze the influence of the length of the leads where current enters/leaves the sample and the ratio of the contact width to the width of these leads. Furthermore we investigate potential barriers in the current-injecting leads and the measurement arms in order to simulate nonideal contacts. Second we simulate nonlocal quantum Hall samples with applied gating voltage at the metallic contacts. For such samples it has been found experimentally that both the longitudinal and Hall resistance as a function of the magnetic field can change significantly. Using the nonequilibrium network model we are able to reproduce most qualitative features of the experiments." @default.
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- W1995517557 date "2009-12-29" @default.
- W1995517557 modified "2023-09-30" @default.
- W1995517557 title "Systematic study of nonideal contacts in integer quantum Hall systems" @default.
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- W1995517557 doi "https://doi.org/10.1103/physrevb.80.235331" @default.
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