Figure 4: Temperature dependence of RD in the BLG/2DEG vertical heterostructure.
From: Anomalous low-temperature Coulomb drag in graphene-GaAs heterostructures
(a) Configuration for the Coulomb drag measurements. A voltage drop Vdrag appears in the 2DEG in response to a current Idrive that flows in BLG. (b) Low-energy parabolic band structure of massive chiral holes in BLG39. (c) Parabolic band structure of Schrödinger electrons in the 2DEG. (d) RD in the low-T limit. The red solid line is a fit based on the functional form reported in equation (1) with Tc~190 mK. Contrary to the SLG/2DEG case, no signal of saturation is observed down to the lowest values of T. The inset shows an optical microscopy image of the contacted BLG on the etched 2DEG GaAs channel. The red dashed line denotes the BLG boundaries. The scale bar is 10 μm long.
