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Collective excitations in twisted bilayer graphene close to the magic angle
Niels C. H. Hesp, Iacopo Torre, Daniel Rodan-Legrain +14
The electronic properties of twisted bilayer graphene (TBG) can be dramatically different from those of a single graphene layer, in particular when the two layers are rotated relat…
Intrinsic 1T' phase induced in atomically thin 2H-MoTe by a single terahertz pulse
Jiaojian Shi, Ya-Qing Bie, Alfred Zong +12
Polymorphic transitions in layered transition metal dichalcogenides provide an excellent platform for discovering exotic phenomena associated with metastable states, ranging from t…
Angle-Dependent {\it Ab initio} Low-Energy Hamiltonians for a Relaxed Twisted Bilayer Graphene Heterostructure
Shiang Fang, Stephen Carr, Ziyan Zhu +2
We present efficient angle-dependent low-energy Hamiltonians to describe the properties of the twisted bilayer graphene (tBLG) heterostructure, based on {\it ab initio} calculation…
Derivation of Wannier orbitals and minimal-basis tight-binding hamiltonians for twisted bilayer graphene: a first-principles approach
Stephen Carr, Shiang Fang, Hoi Chun Po +2
Twisted bilayer graphene (TBLG) has emerged as an important platform for studying correlated phenomena, including unconventional superconductivity, in two-dimensional systems. The…
Dirac fermions and flat bands in the ideal kagome metal FeSn
Mingu Kang, Linda Ye, Shiang Fang +19
The kagome lattice based on 3d transition metals is a versatile platform for novel topological phases hosting symmetry-protected electronic excitations and exotic magnetic ground s…
Clean 2D superconductivity in a bulk van der Waals superlattice
Aravind Devarakonda, Hisashi Inoue, Shiang Fang +7
Advances in low-dimensional superconductivity are often realized through improvements in material quality. Apart from a small group of organic materials, there is a near absence of…
Creating Weyl nodes and controlling their energy by magnetization rotation
Madhav Prasad Ghimire, Jorge I. Facio, Jhih-Shih You +6
As they do not rely on the presence of any crystal symmetry, Weyl nodes are robust topological features of an electronic structure that can occur at any momentum and energy. Acting…
Giant enhancement of interlayer exchange in an ultrathin 2D magnet
Dahlia R. Klein, David MacNeill, Qian Song +8
Following the recent isolation of monolayer CrI3, there has been a surge of new two-dimensional van der Waals magnetic materials, whose incorporation in van der Waals heterostructu…
An exact continuum model for low-energy electronic states of twisted bilayer graphene
Stephen Carr, Shiang Fang, Ziyan Zhu +1
We introduce a complete physical model for the single-particle electronic structure of twisted bilayer graphene (tBLG), which incorporates the crucial role of lattice relaxation. O…