101 citations · 286 across the 14 of their papers we have counts for
14 papers
Topologically Protected Surface Altermagnetism on Antiferromagnets
Valentin Leeb, Peru d'Ornellas, Fernando de Juan +1
Altermagnetism (AM) and its associated spin-transport phenomena are typically linked to spin-split electronic band structures in bulk materials. However, the crystal surface has a…
Collinear -wave magnetism and hidden orbital ferrimagnetism
Valentin Leeb, Johannes Knolle
In the absence of spin-orbit coupling, collinear magnets are classified as even-wave magnets, i.e., either ferro-, antiferro-, or altermagnets. It is based on the belief that colli…
Altermagnetism Without Crystal Symmetry
Peru d'Ornellas, Valentin Leeb, Adolfo G. Grushin +1
Altermagnetism is a collinear magnetic order in which opposite spin species are exchanged under a real-space rotation. Hence, the search for physical realizations has focussed on c…
Raman Circular Dichroism and Quantum Geometry of Chiral Quantum Spin Liquids
Eduard Koller, Valentin Leeb, Natalia B. Perkins +1
We show that the quantum geometry of fractionalized spin excitations in Mott-insulating quantum spin liquids (QSL) gives rise to a finite Raman circular dichroism (RCD) signal. We…
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…
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…
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…
Realizing Altermagnetism in Fermi-Hubbard Models with Ultracold Atoms
Purnendu Das, Valentin Leeb, Johannes Knolle +1
Altermagnetism represents a type of collinear magnetism, that is in some aspects distinct from ferromagnetism and from conventional antiferromagnetism. In contrast to the latter, s…
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…
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…
Theory of Difference Frequency Quantum Oscillations
Valentin Leeb, Johannes Knolle
Quantum oscillations (QO) describe the periodic variation of physical observables as a function of inverse magnetic field in metals. The Onsager relation connects the basic QO freq…
Quantum oscillations in a doped Mott insulator beyond Onsager's relation
Valentin Leeb, Johannes Knolle
The kinetic energy of electrons in a magnetic field is quenched resulting in a discrete set of highly degenerate Landau levels (LL) which gives rise to fascinating phenomena like t…
Anomalous Quantum Oscillations in a Heterostructure of Graphene on a Proximate Quantum Spin Liquid
V. Leeb, K. Polyudov, S. Mashhadi +4
The quasi two-dimensional Mott insulator -RuCl is proximate to the sought-after Kitaev quantum spin liquid (QSL). In a layer of -RuCl on graphene the dominant Kitaev…