Theoretical studies indicate graphene could offer lower resistivity than copper. However, experimental evidence of the improved resistivity has been elusive. This paper from AIST demonstrates 8nm wide 6.4nm thick graphene interconnects with a resistivity of 3.2uohm-cm, which is significantly better than copper with similar dimensions. This milestone for graphene interconnect research is expected to motivate the process integration research that is required to take the technology to the next level.
[4.5. D. Kondo, et al., “Sub 10nm wide intercalated multi-layer graphene interconnects with low resistivity”, AIST]