8 papers
Supermoiré Chern mosaic in helical trilayer WSe2
Zhenyu Wang, Mingjie Zhang, Hai Meng +19
Helically twisted multilayers offer access to moiré physics beyond the single-superlattice paradigm, yet their correlated and topological transport properties remain largely unexp…
Simultaneous nanoscale imaging of local conductivity and chemical potential in a quantum Hall isospin ferromagnet
Jiawei Hu, Shiyu Zhu, Bohao Li +7
Quantum Hall isospin ferromagnetism in multilayer graphene offers a versatile playground for exploring flat band correlated physics, driven by the intricate coupling of spin, valle…
Exact Universal Characterization of Chiral-Symmetric Higher-Order Topological Phases
Jia-Zheng Li, Xun-Jiang Luo, Fengcheng Wu +1
Utilizing Bott index vectors formulated through a series of polynomials of position operators under open boundary conditions, we establish a universal, rigorous, and complete corre…
Signature of gate tunable superconducting network in twisted bilayer graphene
Yingbo Wang, Yingzhuo Han, Lu Cao +14
Twisted van der Waals materials provide a tunable platform for investigating two-dimensional superconductivity and quantum phases. Using spectra-imaging scanning tunneling microsco…
Boundary topological insulators and superconductors of Altland-Zirnbauer tenfold classes
Xun-Jiang Luo, Fengcheng Wu
In a class of systems, there are gapped boundary-localized states described by a boundary Hamiltonian. The topological classification of gapped boundary Hamiltonians, same as the s…
Characterization of higher-order topological superconductors using Bott indices
Xun-Jiang Luo, Jia-Zheng Li, Meng Xiao +1
The abundance of bulk and boundary topologies in higher-order topological phases offer remarkable tunability and diversity to boundary states but also pose a challenge to their uni…