18 citations · 37 across the 9 of their papers we have counts for
10 papers
Quantum Geometry and Pair Breaking in Intra- and Intervalley Superconductivity of Rhombohedral Graphene
Louis Primeau, Yang Zhang, Shi-Zeng Lin
The observation of superconductivity emerging from a spin- and valley-polarized normal state in rhombohedral graphene raises a basic puzzle: intravalley Cooper pairs involve states…
Interlayer Exciton Condensate Stiffness Is Non-Monotonic in Quantum Metric
Bo Zou, Yitong Zhang, Siddhartha Sarkar +3
Identifying the origin of the superfluid stiffness of electron-electron and electron-hole pair condensates is an important issue in flat-band physics. Here, we study the stiffness…
Beyond the Lowest Landau Level: Unlocking More Robust Fractional States Using Flat Chern Bands with Higher Vortexability
Yitong Zhang, Siddhartha Sarkar, Xiaohan Wan +3
Enhancing the many-body gap of a fractional state is crucial for realizing robust fractional excitations. For fractional Chern insulators, existing studies suggest that making flat…
Modeling Quantum Geometry for Fractional Chern Insulators with unsupervised learning
Ang-Kun Wu, Louis Primeau, Jingtao Zhang +3
Fractional Chern insulators (FCIs) in moire materials present a unique platform for exploring strongly correlated topological phases beyond the paradigm of ideal quantum geometry.…
Unconventional Fractional Phases in Multi-Band Vortexable Systems
Siddhartha Sarkar, Xiaohan Wan, Ang-Kun Wu +2
In this Letter, we study topological flat bands with distinct features that deviate from conventional Landau level behavior. We show that even in the ideal quantum geometry limit,…
Edge-driven transition between extended quantum anomalous Hall crystal and fractional Chern insulator in rhombohedral graphene multilayers
Zezhu Wei, Ang-Kun Wu, Miguel Gonçalves +1
Fractional Chern insulators (FCI) with fractionally quantized Hall conductance at fractional fillings and an extended quantum anomalous Hall (EQAH) crystal with an integer quantize…
Doping-induced Quantum Anomalous Hall Crystals and Topological Domain Walls
Miguel Gonçalves, Shi-Zeng Lin
Doping carriers into a correlated quantum ground state offers a promising route to generate new quantum states. The recent advent of moiré superlattices provided a versatile platfo…
Quantum-metric-induced quantum Hall conductance inversion and reentrant transition in fractional Chern insulators
Ang-Kun Wu, Siddhartha Sarkar, Xiaohan Wan +2
The quantum metric of single-particle wave functions in topological flatbands plays a crucial role in determining the stability of fractional Chern insulating (FCI) states. Here, w…
Contrasting twisted bilayer graphene and transition metal dichalcogenides for fractional Chern insulators: an emergent gauge picture
Heqiu Li, Ying Su, Yong Baek Kim +3
The recent experimental discovery of the zero-field fractional Chern insulator (FCI) in twisted moiré superlattices has sparked immense interest in this exotic to…
Symmetry-based classification of exact flat bands in single and bilayer moiré systems
Siddhartha Sarkar, Xiaohan Wan, Shi-Zeng Lin +1
We study the influence of spatial symmetries on the appearance and the number of exact flat bands (FBs) in single and bilayer systems with Dirac or quadratic band crossing points,…