Fig. 3
From: Double quantum criticality in superconducting tin arrays-graphene hybrid
Two QPTs observed in graphene–tin nanoislands array. a The sheet resistance Rs as a function of temperature T for different magnetic fields H from 0 to 3 kOe. The black and pink arrows indicate the Rs peaks. b, c The detailed data collected from the low temperature region (0.05~0.30 K) and high temperature region (2.0~3.0 K) with the magnetic fields varying from 2.4 to 3 kOe and from 1.4 to 2.4 kOe, respectively. The black and pink dashed lines indicate the critical fields H1* = 1.75 kOe and H2* = 2.58 kOe, respectively, where the Rs values are independent of the temperatures
