954 citations · 7.3k across the 85 of their papers we have counts for
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The "Sign problem" of the 3rd order anomalous Hall effect in topological magnetic materials
Xu Zhang, Kai Sun, Zi Yang Meng
The anomalous Hall effect (AHE), which provides a bridgeway between the geometry of quantum wavefunctions and transport measurements, has been a key focus of intensive studies. In…
Nearly flat Chern band in periodically strained monolayer and bilayer graphene
Xiaohan Wan, Siddhartha Sarkar, Kai Sun +1
The flat band is a key ingredient for the realization of interesting quantum states for novel functionalities. In this work, we investigate the conditions for the flat band in both…
Intrinsic nonlinear Hall effect and gate-switchable Berry curvature sliding in twisted bilayer graphene
Meizhen Huang, Zefei Wu, Xu Zhang +8
Though the observation of the quantum anomalous Hall effect and nonlocal transport response reveals nontrivial band topology governed by the Berry curvature in twisted bilayer grap…
Topological exact flat bands in two dimensional materials under periodic strain
Xiaohan Wan, Siddhartha Sarkar, Shi-Zeng Lin +1
We study flat bands and their topology in 2D materials with quadratic band crossing points (QBCPs) under periodic strain. In contrast to Dirac points in graphene, where strain acts…
Band theory and boundary modes of high-dimensional representations of infinite hyperbolic lattices
Nan Cheng, Francesco Serafin, James McInerney +3
Periodic lattices in hyperbolic space are characterized by symmetries beyond Euclidean crystallographic groups, offering a new platform for classical and quantum waves, demonstrati…
Massive Dirac fermions in moiré superlattices: a route towards topological flat minibands
Ying Su, Heqiu Li, Chuanwei Zhang +2
We demonstrate a generic mechanism to realize topological flat minibands by confining massive Dirac fermions in a periodic moiré potential, which can be achieved in a heterobilayer…