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Schematic illustration of a spherical bubble risen in monolayer graphene. The graphene is on the top of the silicon oxide substrate.
The gate voltage dependence of radius of the graphene bubbles. The triangles denote the experimental data extracted from Ref. 18 . The solid line is our theoretical relation, which is a part of an ellipse.
The for gate voltages from −35 V to 0 V.
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