351 citations · 2.2k across the 48 of their papers we have counts for
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UCd: A strongly localized 5 material
Martin Sundermann, Naoki Ito, Daisuke Takegami +11
UCd is an antiferromagnetic uranium intermetallic compound ( = 5.3K) with enhanced electron mass and uranium-uranium spacings nearly twice the Hill limit, suggest…
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…
Three-dimensional zigzag correlations in the van der Waals Kitaev magnet RuBr
H. Gretarsson, R. Iwazaki, F. Sato +8
Ruthenium trihalides Ru ( = Cl, Br, I) provide a tunable platform for Kitaev magnetism in two-dimensional van der Waals materials. Despite their similar crystal structures…
Quantifying the U covalence and degree of localization in U intermetallics
Andrea Marino, Denise S. Christovam, Daisuke Takegami +17
A procedure for quantifying the U electrons' covalence and degree of localization in U intermetallic compounds is presented. To this end, bulk sensitive hard and soft x-ray ph…
Fe substitution in URuSi: singlet magnetism in an extended Doniach phase diagram
Andrea Marino, Denise S. Christovam, Chun-Fu Chang +13
The application of pressure as well as the successive substitution of Ru with Fe in the hidden order (HO) compound URuSi leads to the formation of the large moment antiferr…
Singlet magnetism in intermetallic UGa unveiled by inelastic x-ray scattering
Andrea Marino, Martin Sundermann, Denise S. Christovam +12
Using high resolution tender-x-ray resonant inelastic scattering and hard-x-ray non-resonant inelastic scattering beyond the dipole limit we were able to detect electronic excitati…
Distinct spin and orbital dynamics in SrRuO
H. Suzuki, L. Wang, J. Bertinshaw +13
The unconventional superconductor SrRuO has long served as a benchmark for theories of correlated-electron materials. The determination of the superconducting pairing mecha…
Magnetic Excitations in Square Lattice Iridates: Contrast between BaIrO and SrIrO
J. P. Clancy, H. Gretarsson, A. Lupascu +9
We report a resonant inelastic x-ray scattering (RIXS) investigation of ultra-thin epitaxial films of BaIrO, and compare their low energy magnetic and spin-orbit excitation…
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…
Absence of temperature-dependent phonon anomalies in Sr2IrO4 and Sr3Ir2O7
K. Sen, R. Heid, S. M. Souliou +8
Following previous works reporting an anomalous behavior of several zone-center optical phonons across the magnetic transition of square lattice iridates Sr2IrO4 and Sr3Ir2O7, we h…
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…
Selective orbital imaging of excited states with x-ray spectroscopy: the example of -MnS
A. Amorese, B. Leedahl, M. Sundermann +10
Herein we show that non-resonant inelastic x-ray scattering involving an core level is a powerful spectroscopic method to characterize the excited states of transition metal co…
Spin and charge excitations in the correlated multiband metal Ca3Ru2O7
J. Bertinshaw, M. Krautloher, H. Suzuki +5
We use Ru -edge resonant inelastic x-ray scattering (RIXS) to study the full range of excitations in CaRuO from meV-scale magnetic dynamics through to the eV-scale…
Proximate ferromagnetic state in the Kitaev model material -RuCl
H. Suzuki, H. Liu, J. Bertinshaw +17
-RuCl is a major candidate for the realization of the Kitaev quantum spin liquid, but its zigzag antiferromagnetic order at low temperatures indicates deviations from the…
Impact of Fe substitution on the electronic structure of URuSi
Martin Sundermann, Andrea Amorese, Daisuke Takegami +9
The application of pressure as well as the successive substitution of Ru with Fe in the hidden order (HO) compound URuSi leads to the formation of the large moment antiferr…
Dual nature of 5 electrons in the isostructural UMSi family: from antiferro- to Pauli paramagnetism via hidden order
Andrea Amorese, Martin Sundermann, Brett Leedahl +16
Using inelastic x-ray scattering beyond the dipole limit and hard x-ray photoelectron spectroscopy we establish the dual nature of the U electrons in UMSi (M = Pd, Ni,…
Hidden structural transition in epitaxial CaSrIrO/SrTiO thin film
W. T. Jin, H. Gretarsson, S. Y. Jang +3
A structural transition in an ABO perovskite thin film involving the change of the BO octahedral rotation pattern can be hidden under the global lattice symmetry impose…
Origin of Ising magnetism in Ca3Co2O6 unveiled by orbital imaging
Brett Leedahl, Martin Sundermann, Andrea Amorese +7
The one-dimensional cobaltate Ca3Co2O6 is an intriguing material having an unconventional magnetic structure, displaying quantum tunneling phenomena in its magnetization. Using a n…
Observation of spin-orbit excitations and Hund's multiplets in CaRuO
H. Gretarsson, H. Suzuki, Hoon Kim +6
We use Ru -edge (2838.5 eV) resonant inelastic x-ray scattering (RIXS) to quantify the electronic structure of CaRuO, a layered -electron compound that exhibits a…
Magnetic excitations in hole-doped Sr2IrO4: A comparison with electron-doped cuprates
J. P. Clancy, H. Gretarsson, M. H. Upton +3
We have studied the evolution of magnetic and orbital excitations as a function of hole-doping in single crystal samples of Sr2Ir(1-x)Rh(x)O4 (0.07 < x < 0.42) using high resolutio…
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…
Direct imaging of orbitals in quantum materials
Hasan Yavaş, Martin Sundermann, Kai Chen +5
The spectacular physical properties of quantum materials based on transition metal, rare earth, and actinide elements continue to challenge our comprehension of solid state physics…
Orientation of ground-state orbital in CeCoIn and CeRhIn
M. Sundermann, A. Amorese, F. Strigari +10
We present core level non-resonant inelastic x-ray scattering (NIXS) data of the heavy fermion compounds CeCoIn and CeRhIn measured at the Ce -edges. The higher th…
Probing electronic excitations in iridates with resonant inelastic x-ray scattering and emission spectroscopy techniques
Young-June Kim, J. P. Clancy, H. Gretarsson +6
We report a comprehensive resonant inelastic x-ray scattering (RIXS) study of various iridate materials focusing on core-level excitations and transitions between crystal-field spl…