303 citations · 3.7k across the 90 of their papers we have counts for
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Electron dynamics in a three-dimensional Brillouin zone analysed by machine learning
Paulina Majchrzak, Charlotte Sanders, Yu Zhang +10
The electron dynamics in the unoccupied states of the Weyl semimetal PtBi is studied by time- and angle-resolved photoemission spectroscopy (TR-ARPES). The measurement's result…
Ultrafast carrier dynamics throughout the three-dimensional Brillouin zone of the Weyl semimetal PtBi
Paulina Majchrzak, Charlotte Sanders, Yu Zhang +10
Using time- and angle-resolved photoemission spectroscopy, we examine the unoccupied electronic structure and electron dynamics of the type-I Weyl semimetal PtBi. Using the abi…
Competing spin-orbital singlet states in the 4 honeycomb ruthenate AgLiRuO
T. Takayama, M. Blankenhorn, J. Bertinshaw +25
When spin-orbit-entangled -electrons reside on a honeycomb lattice, rich quantum states are anticipated to emerge, as exemplified by the Kitaev materials. Distinct yet equ…
Coexisting Z-type charge and bond order in metallic NaRuO
Arvind Kumar Yogi, Alexander Yaresko, C. I. Sathish +7
How particular bonds form in quantum materials has been a long-standing puzzle. Two key concepts dealing with charge degrees of freedom are dimerization (forming metal-metal bonds)…
Frustration model and spin excitations in the helimagnet FeP
A. S. Sukhanov, Y. V. Tymoshenko, A. A. Kulbakov +14
The metallic compound FeP belongs to the class of materials that feature a complex noncollinear spin order driven by magnetic frustration. While its double-helix magnetic structure…
Formation of orbital molecules on a pyrochlore lattice induced by A-O bond covalency
A. Krajewska, A. Yaresko, J. Nuss +15
The pyrochlore ruthenate InRuO displays a subtle competition between spin-orbital entanglement and molecular orbital formation. At room temperature, a spin-orbit-entang…
Nonmagnetic State and Spin-Orbit Excitations in KRuCl
H. Takahashi, H. Suzuki, J. Bertinshaw +10
Spin-orbit Mott insulators composed of transition metal ions may host excitonic magnetism due to the condensation of spin-orbital triplons. Prior experiments sugge…
Weakness of Correlation Effect Manifestation in BaNiAs: ARPES and LDA+DMFT study
N. S. Pavlov, T. K. Kim, A. Yaresko +3
The electronic spectral function of BaNiAs is investigated using both the angle-resolved photoemission spectroscopy (ARPES) and a combined computational scheme of local den…
Spin waves and spin-state transitions in a ruthenate high-temperature antiferromagnet
H. Suzuki, H. Gretarsson, H. Ishikawa +16
Ruthenium compounds play prominent roles in materials research ranging from oxide electronics to catalysis, and serve as a platform for fundamental concepts such as spin-triplet su…
Monoclinic SrIrO - A Dirac semimetal produced by non-symmorphic symmetry and spin-orbit coupling
T. Takayama, A. N. Yaresko, H. Takagi
SrIrO crystallizes in a monoclinic structure of distorted hexagonal perovskite at ambient pressure. The transport measurements show that the monoclinic SrIrO is a low-carri…
Pressure-induced collapse of spin-orbital Mott state in the hyperhoneycomb iridate -LiIrO
T. Takayama, A. Krajewska, A. S. Gibbs +8
Hyperhoneycomb iridate -LiIrO is a three-dimensional analogue of two-dimensional honeycomb iridates, such as -LiIrO, which recently appeared as another playgr…
Almost pure Mott state of InIrO in the limit of reduced inter-site hopping
A. Krajewska, T. Takayama, R. Dinnebier +4
The pyrochlore iridate InIrO is a strong Mott insulator with frustrated magnetism. Despite the large trigonal crystal field, a small admixture…
An optical investigation of the strong spin-orbital coupled magnetic semimetal YbMnBi
Dipanjan Chaudhuri, Bing Cheng, Alexander Yaresko +3
Strong spin-orbit coupling (SOC) can result in ground states with non-trivial topological properties. The situation is even richer in magnetic systems where the magnetic ordering c…
Optical anisotropy of the Jeff = 1/2 Mott insulator Sr2IrO4
D. Pröpper, A. N. Yaresko, M. Höppner +7
We report the complex dielectric function along and perpendicular to the IrO2 planes in the layered perovskite Sr2IrO4 determined by spectroscopic ellipsometry in the spectral rang…
S=1/2 quantum critical spin ladders produced by orbital ordering in Ba2CuTeO6
A. S. Gibbs, A. Yamamoto, A. N. Yaresko +10
The ordered hexagonal perovskite Ba2CuTeO6 hosts weakly coupled S=1/2 spin ladders produced by an orbital ordering of Cu2+. The magnetic susceptibility chi(T) of Ba2CuTeO6 is well…
Spin-orbit coupling induced semi-metallic state in the 1/3 hole doped hyper-kagome Na3Ir3O8
T. Takayama, A. Matsumoto, J. Nuss +5
The complex iridium oxide Na3Ir3O8 with a B-site ordered spinel structure was synthesized in single crystalline form, where the chiral hyper-kagome lattice of Ir atoms, as observed…
Fano Resonances in the Infrared Spectra of Phonons in Hyper-Kagome Na_3Ir_3O_8
D. Pröpper, A. N. Yaresko, T. I. Larkin +7
We report the complex dielectric function of high-quality Na_3Ir_3O_8 single crystals determined by spectroscopic ellipsometry in the spectral range from 15 meV to 2 eV. The far-in…
Anisotropic optical response of the mixed-valent Mott-Hubbard insulator NaCu2O2
Y. Matiks, A. N. Yaresko, K. Myung-Whun +4
We report the results of a comprehensive spectroscopic ellipsometry study of NaCu2O2, a compound composed of chains of edge-sharing Cu2+O4 plaquettes and planes of Cu1+ ions in a O…
Electronic structure and x-ray magnetic circular dichroism of YBa2Cu3O7/LaMnO3 superlattices from first-principles calculations
Xiaoping Yang, A. N. Yaresko, V. N. Antonov +1
The origin of x-ray magnetic circular dichroism (XMCD) at the Cu L2,3 edge in YBa2Cu3O7/La(1-x)Ca(x)MnO3 superlattices is revealed by performing first-principle electronic structur…
GdI_2: A New Ferromagnetic Excitonic Solid?
A. Taraphder, M. S. Laad, L. Craco +1
The two-dimensional, colossal magnetoresistive system GdI_2 develops an unusual metallic state below its ferromagnetic transition and becomes insulating at low temperatures. It is…
Dynamic spin susceptibility of paramagnetic spinel LiV2O4
V. Yushankhai, A. Yaresko, P. Fulde +1
In an attempt to explain inelastic neutron scattering data for LiV2O4 the dynamical spin susceptibility χ(Q,w) at zero temperature is calculated. Starting point is a weak coupling…
Electronic structure of charge-ordered Fe3O4 from calculated optical, megneto-optical Kerr effect, and O K-edge x-ray absorption spectra
I. Leonov, A. N. Yaresko, V. N. Antonov +1
The electronic structure of the low-temperature (LT) monoclinic magnetite, Fe3O4, is investigated using the local spin density approximation (LSDA) and the LSDA+U method. The self-…
Hard x-ray spectroscopy in NaxCoO2 and superconducting NaxCoO2 - yH2O: A view on the bulk Co electronic properties
Philippe Leininger, J. -P. Rueff, J. -M. Mariot +6
The electronic properties of Co in bulk Na0.7CoO2 and the superconducting hydrated compound Na0.35CoO2 - y H2O have been investigated by x-ray absorption spectroscopy (XAS) and res…
Mott-Hubbard quantum criticality in paramagnetic CMR pyrochlores
L. Craco, C. I. Ventura, A. N. Yaresko +1
We present a correlated {\it ab initio} description of the paramagnetic phase of TlMnO, employing a combined local density approximation (LDA) with multiorbital dynamic…