Temperature-dependent current–voltage characteristics of (a) tri- and (b) four-layer graphene interconnects. Insets show the details of the low electric field measurements. For tri- and four-layer graphene, resistors show sublinear characteristics at low field (<0.01 V/μm) and superlinear I-V curve for the high field due to the heat effect.
Liu et al. Nanoscale Research Letters 2013 8:335 doi:10.1186/1556-276X-8-335