Figure 2
From: Stokes flow around an obstacle in viscous two-dimensional electron liquid
(a) The magnetoresistance of a GaAs quantum well in a Hall bar sample with obstacle and in a reference sample for different configurations, T = 1.4 K. The schematics show how the current source and the voltmeter are connected for the measurements: configuration with antidot is shown on the right side, configuration for reference without antidot is shown on the left side. (b) Temperature dependent magnetoresistance of a reference Hall bar sample. Dashes are examples illustrating magnetoresistance calculated from Eq. 2 for different temperatures: 1.5 K (blue), 27.7 K(light blue), 44 K (green). (c) Relaxation rates 1/τ (squares) and 1/τ2,ee (circles) as a function of the temperature obtained by fitting the theory with experimental results for the reference sample (black scatters) and a sample with an obstacle (red scatters). Thick black and red lines is Eq. 3, dashes is Eq. 4.
