262 citations · 536 across the 30 of their papers we have counts for
21 papers · 1 filter
Attraction from repulsion in an interacting Chern band: chiral superconductivity, generalized Hall crystals, and competing fractional Chern insulators
Fabian Pichler, Clemens Kuhlenkamp, Ashvin Vishwanath +1
Experiments realizing strong interactions in partially filled Chern bands have observed fractional Chern insulators (FCIs), superconductors, and topological crystals in close proxi…
Tensor network study of deconfined quantum criticality in a one-dimensional spin-phonon model
Anton Romen, Josef Willsher, David Hofmeier +2
Deconfined quantum critical points (DQCPs) describe continuous transitions between ordered phases beyond the Landau paradigm. A simple example is the Néel antiferromagnet (AFM) to…
Fractionalization from Kinetic Frustration in Doped Two-Dimensional SU(4) Quantum Magnets
Wilhelm Kadow, Ivan Morera, Eugene Demler +1
Separating electrons into emergent fractional quasiparticles is a hallmark of exotic quantum phases of matter with strong interactions. Understanding under which circumstances frac…
Electromagnetic Response of a Half-Filled Chern Band near Topological Criticality
Xinlei Yue, Fabian Pichler, Michael Knap +1
We evaluate electromagnetic-response observables in a half-filled Chern band, across a topological phase transition between a composite Fermi liquid (CFL) and a Fermi liquid (FL) p…
False Vacuum Decay in Flat-Band Ferromagnets: Role of Quantum Geometry and Chiral Edge States
Fabian Pichler, Clemens Kuhlenkamp, Michael Knap
Dynamical control of quantum matter is a challenging, yet promising direction for probing strongly correlated states. Motivated by recent experiments in twisted MoTe that demon…
Lessons from -RuCl3 for pursuing quantum spin liquid physics in atomically thin materials
Claudia Ojeda-Aristizabal, Xiaohu Zheng, Changsong Xu +20
Quantum spin liquids can arise from Kitaev magnetic interactions, and exhibit fractionalized excitations with the potential for a topological form of quantum computation. This revi…
Transient localization from fractionalization: vanishingly small heat conductivity in gapless quantum magnets
Shi Feng, Penghao Zhu, Johannes Knolle +1
Several candidate materials for gapless quantum spin liquids exhibit a vanishing thermal conductivity, which is at odds with theoretical predictions. Here, we show that a suppresse…
Microscopic Mechanism of Anyon Superconductivity Emerging from Fractional Chern Insulators
Fabian Pichler, Clemens Kuhlenkamp, Michael Knap +1
Fractional quantum Hall (FQH) states and superconductors typically require contrasting conditions, yet recent experiments have observed them in the same device. A natural explanati…
Theory of Angle Resolved Photoemission Spectroscopy of Altermagnetic Mott Insulators
Lorenzo Lanzini, Purnendu Das, Michael Knap
Altermagnetism has emerged as an unconventional form of collinear magnetism with spatial rotational symmetries, that give rise to strongly spin-split bands despite of an underlying…
Purely electronic model for exciton-polaron formation in moiré heterostructures
Fabian Pichler, Mohammad Hafezi, Michael Knap
Understanding interactions between excitons and correlated electronic states presents a fundamental challenge in quantum many-body physics. Here, we introduce a purely electronic m…
Theory of Nonlinear Spectroscopy of Quantum Magnets
Anubhav Srivastava, Stefan Birnkammer, GiBaik Sim +2
Two-dimensional coherent spectroscopy (2DCS) is an established method for characterizing molecules and has been proposed in the THz regime as a new tool for probing exotic excitati…
Fractionalized Prethermalization in the One-Dimensional Hubbard Model
Anton Romen, Johannes Knolle, Michael Knap
Prethermalization phenomena in driven systems are generally understood via a local Floquet Hamiltonian obtained from a high-frequency expansion. Remarkably, recently it has been sh…
Gate-tunable Bose-Fermi mixture in a strongly correlated moiré bilayer electron system
Amine Ben Mhenni, Wilhelm Kadow, Mikołaj J. Metelski +9
Quantum gases consisting of species with distinct quantum statistics, such as Bose-Fermi mixtures, can behave in a fundamentally different way than their unmixed constituents. This…
Scattering Theory of Chiral Edge Modes in Topological Magnon Insulators
Stefan Birnkammer, Michael Knap, Johannes Knolle +2
Topological magnon insulators exhibit robust edge modes with chiral properties similar to quantum Hall edge states. However, due to their strong localization at the edges, interact…
Giant enhancement of exciton diffusion near an electronic Mott insulator
Pranshoo Upadhyay, Daniel G. Suárez-Forero, Tsung-Sheng Huang +9
Bose-Fermi mixtures naturally appear in various physical systems. In semiconductor heterostructures, such mixtures can be realized, with bosons as excitons and fermions as dopant c…
Probing magnetism in moiré heterostructures with quantum twisting microscopes
Fabian Pichler, Wilhelm Kadow, Clemens Kuhlenkamp +1
Spin-ordered states close to metal-insulator transitions are poorly understood theoretically and challenging to probe in experiments. Here, we propose that the quantum twisting mic…
Deconfined Quantum Criticality in the long-range, anisotropic Heisenberg Chain
Anton Romen, Stefan Birnkammer, Michael Knap
Deconfined quantum criticality describes continuous phase transitions that are not captured by the Landau-Ginzburg paradigm. Here, we investigate deconfined quantum critical points…
Signatures of Domain-Wall Confinement in Raman Spectroscopy of Ising Spin Chains
Stefan Birnkammer, Johannes Knolle, Michael Knap
Mesonic bound states of domain walls can be stabilized in quasi one-dimensional magnetic compounds. Here, we theoretically study the Raman light scattering response of a twisted Ki…
Single-hole spectra of Kitaev spin liquids: from dynamical Nagaoka ferromagnetism to spin-hole fractionalization
Wilhelm Kadow, Hui-Ke Jin, Johannes Knolle +1
The dynamical response of a quantum spin liquid upon injecting a hole is a pertinent open question. In experiments, the hole spectral function, measured momentum-resolved in angle-…
Kinetic Ferromagnetism and Topological Magnons of the Hole-Doped Kitaev Spin Liquid
Hui-Ke Jin, Wilhelm Kadow, Michael Knap +1
We study the effect of hole doping on the Kitaev spin liquid (KSL) and find that for ferromagnetic (FM) Kitaev exchange the system is very susceptible to the formation of a FM…
Evaluation of time-dependent correlators after a local quench in iPEPS: hole motion in the t-J model
C. Hubig, A. Bohrdt, M. Knap +2
Infinite projected entangled pair states (iPEPS) provide a convenient variational description of infinite, translationally-invariant two-dimensional quantum states. However, the si…