380 citations · 5k across the 76 of their papers we have counts for
76 papers
Realization of ideal flat band by rotated d-orbitals in Kagome metals
Dongwook Kim, Feng Liu
Recently there has been intense interest in Kagome metals, which are expected to host flat bands (FBs). However, the observed FBs are non-ideal as they are not flat over the whole…
Topological field-effect transistor with quantized ON/OFF conductance of helical/chiral dislocation states
Xiaoyin Li, Feng Liu
Topology is a key ingredient driving the emergence of quantum devices. Topological field-effect transistor (TFET) has been proposed to outperform the conventional FET by replacing…
Anomalous Bilayer Quantum Hall Effect
Gurjyot Sethi, D. N. Sheng, Feng Liu
In parallel to the condensed-matter realization of quantum Hall (Chern insulators), quantum spin Hall (topological insulators), and fractional quantum Hall (fractional Chern insula…
Excitonic Condensate in Flat Valence and Conduction Bands of Opposite Chirality
Gurjyot Sethi, Martin Cuma, Feng Liu
Excitonic Bose-Einstein condensation (EBEC) has drawn increasing attention recently with the emergence of 2D materials. A general criterion for EBEC, as expected in an excitonic in…
Negative Interatomic Spring Constant Manifested by Topological Phonon Flat Band
Bowen Xia, Hang Liu, Feng Liu
Phonons as bosons are different from electrons as fermions. Unlike interatomic electron hopping that can be either positive or negative and further tuned by spin-orbit coupling, in…
Effective Model for Fractional Topological Corner Modes in Quasicrystals
Citian Wang, Feng Liu, Huaqing Huang
High-order topological insulators (HOTIs), as generalized from topological crystalline insulators (TCIs), are characterized with lower-dimensional metallic boundary states protecte…