36 citations · 165 across the 12 of their papers we have counts for
12 papers
Gradient-based optimization of non-Abelian fractional quantum states in patterned superlattices
Yifei Guan, Lichen Yu, Zizhuang Liu +2
The realization of fractional Chern insulator (FCI) states in moiré heterostructures has attracted intense interest in the study of correlated topological states. So far, most expe…
Electronic states at twist stacking faults in rhombohedral graphite
Xiaoqian Liu, Yifei Guan, Oleg V. Yazyev
Flat bands in graphitic materials emerged as a platform for realizing tunable correlated physics. As a nodal-line semimetal, rhombohedral graphite features flat drumhead surface st…
Strongly correlated Hofstadter subbands in minimally twisted bilayer graphene
Cheng Shen, Yifei Guan, Davide Pizzirani +7
Moiré superlattice in twisted bilayer graphene has been proven to be a versatile platform for exploring exotic quantum phases. Extensive investigations have been invoked focusing o…
Renormalization group of topological scattering networks
Zhe Zhang, Yifei Guan, Junda Wang +5
Exploring and understanding topological phases in systems with strong distributed disorder requires developing fundamentally new approaches to replace traditional tools such as top…
Observation of Kekulé vortices induced in graphene by hydrogen adatoms
Y. Guan, C. Dutreix, H. Gonzales-Herrero +5
Fractional charges are one of the wonders of the fractional quantum Hall effect, a liquid of strongly correlated electrons in a large magnetic field. Fractional excitations are als…
Symmetry and topology of hyperbolic Haldane models
Anffany Chen, Yifei Guan, Patrick M. Lenggenhager +3
Particles hopping on a two-dimensional hyperbolic lattice feature unconventional energy spectra and wave functions that provide a largely uncharted platform for topological phases…
Electronic transport in graphene with out-of-plane disorder
Yifei Guan, Oleg V. Yazyev
Real-world samples of graphene often exhibit various types of out-of-plane disorder -- ripples, wrinkles and folds -- introduced at the stage of growth and transfer processes. Thes…
Engineering SYK interactions in disordered graphene flakes under realistic experimental conditions
Marta Brzezinska, Yifei Guan, Oleg V. Yazyev +2
We model SYK (Sachdev-Ye-Kitaev) interactions in disordered graphene flakes up to 300 000 atoms (100 nm in diameter) subjected to an out-of-plane magnetic field of 5-20 T…
Re-entrant magic-angle phenomena in twisted bilayer graphene in integer magnetic fluxes
Yifei Guan, Oleg V. Yazyev, Alexander Kruchkov
In this work we address the re-entrance of magic-angle phenomena (band flatness and quantum-geometric transport) in twisted bilayer graphene (TBG) subjected to strong magnetic flux…
Unconventional Flat Chern Bands and 2 Charges in Skyrmionic Moiré Superlattices
Yifei Guan, Oleg V. Yazyev, Alexander Kruchkov
The interplay of topological characteristics in real space and reciprocal space can lead to the emergence of unconventional topological phases. In this Letter, we implement a novel…
Landau Levels of the Euler Class Topology
Yifei Guan, Adrien Bouhon, Oleg V. Yazyev
Two-dimensional systems with () symmetry exhibit the Euler class topology in each two-band subspace realizing a fragile topology b…
Landau Levels as a Probe for Band Topology in Graphene Moiré Superlattices
QuanSheng Wu, Jianpeng Liu, Oleg V. Yazyev
We propose Landau levels as a probe for the topological character of electronic bands in two-dimensional moiré superlattices. We consider two configurations of twisted double bilay…