Apparent strange metal behavior in small angle twisted bilayer graphene

Strange metals are an intriguing class of conductors known for their unconventional electronic properties. These materials, while not fully understood, are typically characterized by their linear temperature-dependent resistivity and linear field-dependent magnetotransport. In this theoretical work we focus on the electronic transport properties of twisted bilayer graphene, a material that is believed to exhibit strange metal behavior. We adapt and develop a version of the Sachdev-Ye-Kitaev model [A. Patel, et al. Phys. Rev. X 8, 021049 (2018)] to determine how a true strange metal will behave, and contrast this with some of our previous work on linear electrical transport in twisted bilayer graphene [G. Sharma et al. Nature Communications 12, 5737 (2021)] and linear magnetotransport in disordered 2D materials [J. Ping et al. Phys. Rev. Lett. 113 047206 (2014)]. Our results highlight the possibility of ordinary metals mimicking strange metal characteristics and underscore the necessity for careful interpretation of experimental data.