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Cascade of electronic transitions in magic-angle twisted bilayer graphene
Dillon Wong, Kevin P. Nuckolls, Myungchul Oh +7
Magic-angle twisted bilayer graphene (MATBG) exhibits a rich variety of electronic states, including correlated insulators, superconductors, and topological phases. Understanding t…
Flat Chern Band From Twisted Bilayer MnBiTe
Biao Lian, Zhaochen Liu, Yuanbo Zhang +1
We construct a continuum model for the Moiré superlattice of twisted bilayer MnBiTe, and study the band structure of the bilayer in both ferromagnetic (FM) and antiferromag…
Spectroscopic signatures of many-body correlations in magic angle twisted bilayer graphene
Yonglong Xie, Biao Lian, Berthold Jäck +6
The discovery of superconducting and insulating states in magic angle twisted bilayer graphene (MATBG) has ignited considerable interest in understanding the nature of electronic i…
Topological photocurrent responses from chiral surface Fermi arcs
Guoqing Chang, Jiaxin Yin, Titus Neupert +10
The nonlinear optical responses from topological semimetals are crucial in both understanding the fundamental properties of quantum materials and designing next-generation light-se…
Topology-Bounded Superfluid Weight In Twisted Bilayer Graphene
Fang Xie, Zhida Song, Biao Lian +1
While regular flat bands are good for enhancing the density of states and hence the gap, they are detrimental to the superfluid weight. We show that the predicted nontrivial topolo…
The chiral SYK model
Biao Lian, S. L. Sondhi, Zhenbin Yang
We study the generalization of the Sachdev-Ye-Kitaev (SYK) model to a dimensional chiral SYK model of flavors of right-moving chiral Majorana fermions with all-to-all ran…
Type-II Ising superconductivity in two-dimensional materials with strong spin-orbit coupling
Chong Wang, Biao Lian, Xiaomi Guo +6
Recent discovery of Ising superconductivity protected against in-plane magnetic field by spin-orbit coupling (SOC) has stimulated intensive research interests. The effect, however,…
Negative flat band magnetism in a spin-orbit coupled correlated kagome magnet
Jia-Xin Yin, Songtian S. Zhang, Guoqing Chang +17
It has long been speculated that electronic flat band systems can be a fertile ground for hosting novel emergent phenomena including unconventional magnetism and superconductivity.…