514 citations · 2.6k across the 56 of their papers we have counts for
11 papers · 1 filter
Van der Waals Heterostructure PtHgSe/CrI for Topological Valleytronics
Zheng Liu, Yulei Han, Yafei Ren +2
We identify a valley-polarized Chern insulator in the van der Waals heterostructure, PtHgSe/CrI, for potential applications with interplay between electric, magneti…
Twistronics in graphene-based van der Waals structures
Ya-Ning Ren, Yu Zhang, Yi-Wen Liu +1
The electronic properties of van der Waals (vdW) structures can be substantially modified by the moire superlattice potential, which strongly depends on the twist angle among the c…
Tunable lattice reconstruction and bandwidth of flat bands in magic-angle twisted bilayer graphene
Yi-Wen Liu, Ying Su, Xiao-Feng Zhou +10
The interplay between interlayer van der Waals interaction and intralayer lattice distortion can lead to structural reconstruction in slightly twisted bilayer graphene (TBG) with t…
Robust two-dimensional ice on graphene built from finite-length water molecular chains
Sheng Han, Jia-Bin Qiao, Lin-Fang Hou +7
Interfacial ice on graphene has attracted much attention because it is a model system to study two-dimensional (2D) ice structures on chemically inert substrates. While water-graph…
WKB estimate of bilayer graphene's magic twist angles
Yafei Ren, Qiang Gao, A. H. MacDonald +1
Graphene bilayers exhibit zero-energy flat bands at a discrete series of magic twist angles. In the absence of intra-sublattice inter-layer hopping, zero-energy states satisfy a Di…
Quantum Phases of Kagome Electron System with Half-Filled Flat Bands
Yafei Ren, Hong-Chen Jiang, Zhenhua Qiao +1
We study the quantum phase diagram of spinful fermions on kagome lattice with half-filled lowest flat bands. To understand the competition between magnetism, flat band frustration,…
Valley-Current Splitter in Minimally Twisted Bilayer Graphene
Tao Hou, Yafei Ren, Yujie Quan +3
We study the electronic transport properties at the intersection of three topological zero-lines as the elementary current partition node that arises in minimally twisted bilayer g…
Engineering Corner States from Two-Dimensional Topological Insulators
Yafei Ren, Zhenhua Qiao, Qian Niu
We theoretically demonstrate that the second-order topological insulator with robust corner states can be realized in two-dimensional topological insulators by apply…
Approaching Three-Dimensional Quantum Hall effect in Bulk HfTe5
Pang Wang, Yafei Ren, Fangdong Tang +5
The discovery of quantum Hall effect in two-dimensional (2D) electronic systems inspired the topological classifications of electronic systems1,2. By stacking 2D quantum Hall effec…
Electron interactions in strain-induced zero-energy flat band in twisted bilayer graphene near the magic angle
Yu Zhang, Zhe Hou, Ya-Xin Zhao +6
In the vicinity of the magic angle in twisted bilayer graphene (TBG), the two low-energy van Hove singularities (VHSs) become exceedingly narrow1-10 and many exotic correlated stat…
Breaking whispering-gallery modes of massless Dirac fermions in graphene quantum dots by Coulomb interaction
Zhong-Qiu Fu, Ke-Ke Bai, Ya-Ning Ren +2
Coulomb interaction is of central importance in localized energy levels (bound states) or electronic flat bands and could result in many exotic quantum phases, such as magnetic, su…