124 citations · 1.6k across the 61 of their papers we have counts for
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Altermagnetism from a Cu-Fe Lieb Lattice in FeSe/Cuprate Heterostructures
Ying Li, Augustin Davignon, Peng Rao +4
Realizing altermagnetism in high- cuprate-based systems would provide a direct route for studying spin-split electronic bands in the absence of net magnetization and investiga…
Microscopic Emergence of Ancilla Lattice Physics in the Emery Model
Mikołaj Walicki, Johannes Knolle, Krzysztof Wohlfeld
We derive a controlled low-energy effective theory for the three-band Emery model on the Lieb lattice near (n=2) filling. Starting from the positive charge-transfer regime, a seque…
GHz non-reciprocal optical conductivity in hematite (-)
Peng Rao, Johannes Gröbmeyer, P. Peter Stavropoulos +5
We study the non-reciprocal properties of the iron oxide -FeO (hematite) in the canted easy-plane antiferromagnetic phase, specifically in the GHz to THz frequency range…
Magnetic Bloch Oscillations in Odd-Wave Magnets and the Nonlinear Edelstein Effect
Jonas Habel, Johannes Knolle
Bloch oscillations (BOs) are a quantum phenomenon in which electrons subjected to an electric field in a periodic potential exhibit an oscillating current without a net drift. In r…
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…
Fate of Topological Dirac Magnons in van der Waals Ferromagnets at Finite Temperature
Rintaro Eto, Ignacio Salgado-Linares, Masahito Mochizuki +2
Dirac magnons, the bosonic counterparts of Dirac fermions in graphene, provide a unique platform to explore symmetry-protected band crossings and quantum geometry in magnetic insul…
Unstable periodic orbits galore and quantum hyperscarring in highly frustrated magnets
Andrea Pizzi, Claudio Castelnovo, Johannes Knolle
Highly frustrated magnets, with their macroscopically-degenerate classical ground states and massively-entangled quantum spin liquid phases, have been pivotal to the development of…
Order-by-disorder in magnets with frustrated spin interactions -- classical and large- limits via the spin functional integral
Peng Rao, Johannes Knolle
We investigate spin systems with extensive degeneracies in the classical ground states due to anisotropic frustrated spin interactions, where the degeneracy is not protected by sym…
Extrinsic contribution to bosonic thermal Hall transport
Léo Mangeolle, Johannes Knolle
Bosonic excitations like phonons and magnons dominate the low-temperature transport of magnetic insulators. Similar to electronic Hall responses, the thermal Hall effect (THE) of c…
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…
Exploring d-Wave Magnetism in Cuprates from Oxygen Moments
Ying Li, Valentin Leeb, Krzysztof Wohlfeld +2
The antiferromagnetic parent phase of high-T cuprates has been established as a Néel state of copper moments, but early work pointed out the important role of ligand oxygen orb…
Ferrimagnetic Kitaev spin liquids in mixed spin 1/2 spin 3/2 honeycomb magnets
Willian Natori, Yang Yang, Hui-Ke Jin +2
We explore the potential experimental realization of the mixed-spin Kitaev model in materials such as ZrRuCl, where spin-1/2 and spin-3/2 ions occupy distinct s…
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…
Anomalous quantum oscillations from boson-mediated interband scattering
Léo Mangeolle, Johannes Knolle
Quantum oscillations (QO) in metals refer to the periodic variation of thermodynamic and transport properties as a function of inverse applied magnetic field. QO frequencies are no…
A Field Guide to non-Onsager Quantum Oscillations in Metals
Valentin Leeb, Nico Huber, Christian Pfleiderer +2
Quantum oscillation (QO) measurements constitute a powerful method to measure the Fermi surface (FS) properties of metals. The observation of QOs is usually taken as strong evidenc…
Numerical Study of Quantum Oscillations of the Quasiparticle Lifetime: Impurity Spectroscopy, Novel Electric Field and Strain Effects
Valentin Leeb, Johannes Knolle
Quantum oscillation (QOs) measurements constitute one of the most powerful methods for determining the Fermi surface (FS) of metals, exploiting the famous Onsager relation between…
Tunable band topology and optical conductivity in altermagnets
Peng Rao, Alexander Mook, Johannes Knolle
We study two-dimensional -wave altermagnetic metals taking into account the presence of substrate-induced Rashba spin-orbit coupling. We consider the altermagnet bandstructure u…
Continuum of magnetic excitations in the Kitaev honeycomb iridate DLiIrO
Thomas Halloran, Yishu Wang, K. W. Plumb +12
Inelastic neutron scattering (INS) measurements of powder DLi)(Ir)O reveal low energy magnetic excitations with a scattering cross section that is broad in…
Spontaneous Formation of Altermagnetism from Orbital Ordering
Valentin Leeb, Alexander Mook, Libor Šmejkal +1
Altermagnetism has emerged as a third type of collinear magnetism. In contrast to standard ferromagnets and antiferromagnets, altermagnets exhibit extra even-parity wave spin order…
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…
Interband scattering- and nematicity-induced quantum oscillation frequency in FeSe
Valentin Leeb, Johannes Knolle
Understanding the nematic phase observed in the iron-chalcogenide materials is crucial for describing their superconducting pairing. Experiments on FeSeS showed that on…
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…
Quantum Oscillations of the Quasiparticle Lifetime in a Metal
Nico Huber, Valentin Leeb, Andreas Bauer +4
Following nearly a century of research, it remains a puzzle that the low-lying excitations of metals are remarkably well explained by effective single-particle theories of non-inte…