12 citations · 26 across the 14 of their papers we have counts for
4 papers · 1 filter
Orbital magnetization and magnetic susceptibility of interacting electrons
Jian Kang, Minxuan Wang, Oskar Vafek
We present a rigorous derivation of the orbital magnetization for interacting electrons within the self-consistent Hartree-Fock approximation. Our method also allows us to derive f…
Ferromagnetism vs. Antiferromagnetism in Narrow-Band Systems: Competition Between Quantum Geometry and Band Dispersion
Haoyu Hu, Oskar Vafek, Kristjan Haule +1
Magnetism in narrow-band systems arises from the interplay between electronic correlations, quantum geometry, and band dispersion. In particular, both ferro and anti-ferro magnets…
Extended Fractional Chern Insulators Near Half Flux in Twisted Bilayer Graphene Above the Magic Angle
Joe Finney, Aaron L. Sharpe, Linsey K. Rodenbach +7
Fractional Chern insulators (FCIs) -- the lattice analog of fractional quantum Hall states -- form as fractionalized quasiparticles emerge in a partially-filled Chern band. This fr…
Kekulé Spiral Order from Strained Topological Heavy Fermions
Jonah Herzog-Arbeitman, Dumitru Călugăru, Haoyu Hu +5
The topological heavy fermion (THF) model of twisted bilayer graphene is a framework for treating its strongly interacting topological flat bands. In this work, we employ the THF m…