Figure 3: Classical confinement of the RBS.

(a) Comparison between measured (solid-red) and simulated (dashed-blue) normalized conductance oscillations (G_osc) in the RBS channel at zero magnetic field (B). (b) Magnetic field dependence of the giant oscillations at back-gate voltage (V_BG) 1.6 V. The oscillations decay rapidly with magnetic field, indicating a shift to transport channels that do not include the RBS. The average conductance, , over the displayed gate voltage range has been subtracted from the conductance, G(B), at each constant B trace to remove the strong magnetic field dependence of the GL resistance: . (c) Comparison between normalized conductance amplitude of the measured (solid-red) and simulated (dashed-blue) oscillations as a function of magnetic field. The simulations reproduce the observed rapid decay in oscillation amplitude due to classical confinement, in which collapse of the giant oscillations occurs as , where B_C is the critical magnetic field, is the Fermi momentum in the GL, L is the size of the LGR, is Plank’s constant divided by 2π and e is the elementary charge.