Universal Scaling of Intrinsic Resistivity in Two-Dimensional Metallic Borophene

Two-dimensional boron sheets (borophenes) have been successfully synthesized in experiments and are expected to exhibit intriguing transport properties. A comprehensive first-principles study is reported of the intrinsic electrical resistivity of emerging borophene structures. The resistivity is highly dependent on different polymorphs and electron densities of borophene. Interestingly, a universal behavior of the intrinsic resistivity is well-described using the Bloch-Gruneisen model. In contrast to graphene and conventional metals, the intrinsic resistivity of borophenes can be easily tuned by adjusting carrier densities, while the Bloch-Gruneisen temperature is nearly fixed at 100K. This work suggests that monolayer boron can serve as intriguing platform for realizing tunable two-dimensional electronic devices.