Strange metallic transport above correlated insulating states in twisted bilayer graphene

Recent experiments report ubiquitous observations of correlated insulating states at integer fillings of low energy bands, that give way to strange metal transport with T-linear resistivity upon heating, in magic-angle twisted bilayer graphene (MATBG). However, a theoretical framework that provides an understanding of this strange metal transport starting from the low energy correlated insulator physics of MATBG remains lacking. In this work, we focus on local tendencies for spontaneous symmetry breaking in the order parameters describing topological correlated insulating states. We consider the effect of the redirection of bulk current flow due to fluctuations of the order parameter landscape on transport. We find that thermal fluctuations in the landscape of heterogeneous order parameter configurations above the ordering transition lead to T-linear resistivity over a wide range of temperatures. Furthermore, we discuss the effects of such physics on the Hall resistivity at temperatures above the ordering transition.