1.2k citations · 2.2k across the 42 of their papers we have counts for
42 papers
Between Mott and cluster Mott: spin-orbit entangled dimer singlets in BaCeRuO
L. Pätzold, A. Sandberg, H. Schilling +8
The hexagonal 4d ruthenates Ba3MRu2O9 host structural dimers and exhibit a delicate balance of competing interactions. Hund's coupling, trigonal crystal-field splitting, and hoppin…
Spin-orbital-lattice entanglement in the ideal j=1/2 compound KIrCl
P. Warzanowski, M. Magnaterra, Ch. J. Sahle +9
Mott insulators with spin-orbit entangled j=1/2 moments host intriguing magnetic properties. The j=1/2 wave function requires cubic symmetry, while a noncubic crystal field mixes j…
THz Control of Exchange Mode in a Ferrimagnetic Cavity
Chris Reinhoffer, Ilya Razdolski, Philipp Stein +4
The interaction of terahertz (THz) radiation with high-frequency spin resonances in complex magnetic materials is central for modern ultrafast magnonics. Here we demonstrate strong…
Tuning the interlayer coupling in La0.7Sr0.3Mn0.95Ru0.05O3 / LaNiO3 multilayers with perpendicular magnetic anisotropy
Jörg Schöpf, Valentina Piva, Paul H. M. van Loosdrecht +6
In ferromagnetic oxide epitaxial multilayers, magnetic properties and interlayer coupling are determined by a variety of factors. Beyond the contribution of interlayer exchange cou…
Spin-orbit coupling in a half-filled shell: the case of KReCl
P. Warzanowski, M. Magnaterra, G. Schlicht +9
The half-filled shell of the configuration usually, in LS coupling, hosts a S = 3/2 ground state with quenched orbital moment. This state is not Jahn-Teller act…
Strong terahertz third-harmonic generation by kinetic heavy quasiparticles in CaRuO
C. Reinhoffer, Sven Esser, Sebastian Esser +6
We report on time-resolved nonlinear terahertz spectroscopy of a strongly correlated ruthenate, CaRuO, as a function of temperature, frequency and terahertz field strength. Thi…
Quasimolecular =3/2 moments in the cluster Mott insulator GaTaSe
M. Magnaterra, J. Attig, L. Peterlini +8
Quasimolecular orbitals in cluster Mott insulators provide a route to tailor exchange interactions, which may yield novel quantum phases of matter. We demonstrate the cluster Mott…
Impulsive Fermi magnon-phonon resonance in antiferromagnetic
Thomas W. J. Metzger, Kirill A. Grishunin, Chris Reinhoffer +13
Understanding spin-lattice interactions in antiferromagnets is one of the most fundamental issues at the core of the recently emerging and booming fields of antiferromagnetic spint…
Electronic excitations in J=0 Os halides studied by RIXS and optical spectroscopy
P. Warzanowski, M. Magnaterra, P. Stein +10
We demonstrate that the cubic antifluorite-type halides KOsCl, KOsBr, and RbOsBr are excellent realizations of non-magnetic J=0 compounds. The magnetic susc…
RIXS observation of bond-directional nearest-neighbor excitations in the Kitaev material NaIrO
M. Magnaterra, K. Hopfer, Ch. J. Sahle +13
Spin-orbit coupling locks spin direction and spatial orientation and generates, in semi-classical magnets, a local spin easy-axis and associated ordering. Quantum spin-1/2's defy t…
Disentangling the magneto-optic Kerr effect of manganite epitaxial heterostructures
Jörg Schöpf, Paul H. M. van Loosdrecht, Ionela Lindfors-Vrejoiu
Magneto-optic Kerr effect can probe the process of magnetization reversal in ferromagnetic thin films and thus be used as an alternative to magnetometry. Kerr effect is wavelength-…
Local symmetry breaking and low-energy continuum in KReCl
P. Stein, T. C. Koethe, L. Bohaty +3
Using polarization selective spontaneous Raman scattering, we have investigated the 5 transition metal compound KReCl which displays a series of structural phase transit…
Ellipticity control of terahertz high-harmonic generation in a Dirac semimetal
Semyon Germanskiy, Renato M. A. Dantas, Sergey Kovalev +9
We report on terahertz high-harmonic generation in a Dirac semimetal as a function of the driving-pulse ellipticity and on a theoretical study of the field-driven intraband kinetic…
High-order nonlinear terahertz probing of the two-band superconductor MgB: Third- and fifth-order harmonic generation
C. Reinhoffer, P. Pilch, A. Reinold +16
We report on high-order harmonic generation in the two-band superconductor MgB driven by intense terahertz electromagnetic pulses. Third- and fifth-order harmonics are resolved…
Quasimolecular electronic structure of the spin-liquid candidate BaInIrO
A. Revelli, M. Moretti Sala, G. Monaco +16
The mixed-valent iridate Ba3InIr2O9 has been discussed as a promising candidate for quantum spin-liquid behavior. The compound exhibits Ir ions in face-sharing IrO6 octahe…
Thickness and temperature dependence of the atomic-scale structure of SrRuO thin films
Xuanyi Zhang, Aubrey N. Penn, Lena Wysocki +6
Due to the strong lattice-property relationships which exist in complex oxide epitaxial layers, their electronic and magnetic properties can be modulated by structural distortions…
Magnetic interlayer coupling between ferromagnetic SrRuO layers through a SrIrO spacer
Lena Wysocki, Sven Erik Ilse, Lin Yang +5
A key element to tailor the properties of magnetic multilayers is the coupling between the individual magnetic layers. In case of skyrmion hosting multilayers, coupling of skyrmion…
Band-selective third-harmonic generation in superconducting MgB: Possible evidence for Higgs amplitude mode in the dirty limit
Sergey Kovalev, Tao Dong, Li-Yu Shi +13
We report on time-resolved linear and nonlinear terahertz spectroscopy of the two-band superconductor MgB with the superconducting transition temperature K. Th…
Origin of the hump anomalies in the Hall resistance loops of ultrathin SrRuO/SrIrO multilayers
Lin Yang, Lena Wysocki, Jörg Schöpf +6
The proposal that very small Néel skyrmions can form in SrRuO/SrIrO epitaxial bilayers and that the electric field-effect can be used to manipulate these skyrmions in gated…
Non-perturbative high-harmonic generation in the three-dimensional Dirac semimetal CdAs
Sergey Kovalev, Renato M. A. Dantas, Semyon Germanskiy +12
Harmonic generation is a general characteristic of driven nonlinear systems, and serves as an efficient tool for investigating the fundamental principles that govern the ultrafast…
High-Field Quantum Disordered State in -RuCl3: Spin Flips, Bound States, and a Multi-Particle Continuum
A. Sahasrabudhe, D. A. S. Kaib, S. Reschke +15
Layered -RuCl3 has been discussed as a proximate Kitaev spin liquid compound. Raman and THz spectroscopy of magnetic excitations confirm that the low-temperature antiferromagnet…
Spin-orbit entangled j=1/2 moments in BaCeIrO -- a frustrated fcc quantum magnet
A. Revelli, C. C. Loo, D. Kiese +16
We establish the double perovskite BaCeIrO as a nearly ideal model system for j=1/2 moments, with resonant inelastic x-ray scattering indicating a deviation of less than 1%…
Optically probing symmetry breaking in the chiral magnet Cu2OSeO3
R. B. Versteeg, I. Vergara, S. D. Schäfer +5
We report on the linear optical properties of the chiral magnet Cu2OSeO3, specifically associated with the absence of inversion symmetry, the chiral crystallographic structure, and…
Revealing puddles of electrons and holes in compensated topological insulators
N. Borgwardt, J. Lux, I. Vergara +7
Three-dimensional topological insulators harbour metallic surface states with exotic properties. In transport or optics, these properties are typically masked by defect-induced bul…