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(a) Electron microscope image of the studied asymmetric constriction. One can see on the left side the metal-surface depletion gate and on the right side the etched side gate. These two gates define the dimension of the quantum wire. (b) Schematic picture of the electron motion by different applied magnetic fields. One can see the magnetic deflection of the electrons toward the constriction depending on the magnetic field direction.
Conductance vs top-gate voltage . For , the channel in the hybrid constriction is defined and differs significantly when the magnetic field direction is changed.
(a) as a function of the probe-voltage for different magnetic fields is compared with the asymmetric conductance reference from D. Hartmann et al. (Ref. 11). One can see a higher value of the asymmetric conductance with asymmetric side walls than symmetric side walls. (b) The maximum of the asymmetric conductance vs increases linear and saturates for . (c) Probe-voltage vs magnetic field strength. The asymmetry is the dominating magnetic field effect for small .
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