108 citations · 700 across the 24 of their papers we have counts for
26 papers
The Propagating Nature of Single- and Multimagnons in LaCrO
Masoud Lazemi, Fabian J. Mohammad, Ellen M. Kiens +6
The dispersion of an excitation is commonly used to infer its microscopic character: dispersive modes are associated with propagation, whereas nondispersive features are often inte…
Oxygen K-edge X-ray Absorption Spectroscopy Database for NMC811 Layered Cathode Materials
Jian He, Bowen Xiu, Feng Ryan Wang +2
X-ray absorption spectroscopy (XAS) probes the local chemical environment of the absorbing atom and is one of the most powerful characterization techniques for battery materials. H…
Synthesis of epitaxial TaO thin films on AlO by suboxide molecular-beam epitaxy and thermal laser epitaxy
Yorick A. Birkhölzer, Anna S. Park, Noah Schnitzer +28
Tantalum dioxide (TaO2) is a metastable tantalum compound. Here, we report the epitaxial stabilization of TaO2 on Al2O3 (1-102) (r-plane sapphire) substrates using suboxide molecul…
Atomic multiplet and charge-transfer screening effects in 1 and 2 core-level X-ray photoelectron spectra of early 3 transition-metal oxides
Tatsuya Yamaguchi, Keisuke Higashi, Anna Regoutz +5
We present a comparative analysis of 1 and 2 core-level hard X-ray photoelectron spectroscopy (HAXPES) spectra in metallic VO and CrO. Even though the V 1 and 2…
Modulation-Doping a Correlated Electron Insulator
Debasish Mondal, Smruti Rekha Mahapatra, Abigail M Derrico +11
Correlated electron materials (CEMs) host a rich variety of condensed matter phases. Vanadium dioxide (VO2) is a prototypical CEM with a temperature-dependent metal-to-insulator (M…
A Rate Model of Electron Populations for Non-linear High-Fluence X-ray Absorption Near-Edge Spectra
Robin Y. Engel, Markus Scholz, Jan O. Schunck +1
Absorbing a focused, femtosecond X-ray pulse from a Free-Electron Laser (FEL) can lead to extreme electronic excitations in solids. This excitation drives changes of the electronic…
Electron Dynamics at High-Energy Densities in Nickel from Non-linear Resonant X-ray Absorption Spectra
Robin Y. Engel, Oliver Alexander, Kaan Atak +40
The pulse intensity from X-ray free-electron lasers (FELs) can create extreme excitation densities in solids, entering the regime of non-linear X-ray-matter interactions. We show L…
The interplay of local electron correlations and ultrafast spin dynamics in fcc Ni
Tobias Lojewski, Mohamed F. Elhanoty, Loïc Le Guyader +48
The complex electronic structure of metallic ferromagnets is determined by a balance between exchange interaction, electron hopping leading to band formation, and local Coulomb rep…
Oxygen and iron in interstellar dust: an X-ray investigation
I. Psaradaki, E. Costantini, D. Rogantini +9
Understanding the chemistry of the interstellar medium (ISM) is fundamental for the comprehension of the Galactic and stellar evolution. X-rays provide an excellent way to study th…
Satellites in the Ti~1 core level spectra of SrTiO and TiO
Atsushi Hariki, Keisuke Higashi, Tatsuya Yamaguchi +7
Satellites in core level spectra of photoelectron spectroscopy (PES) can provide crucial information on the electronic structure and chemical bonding in materials, particular in tr…
Ultrafast X-ray imaging of the light-induced phase transition in VO2
Allan S. Johnson, Daniel Pérez-Salinas, Khalid M. Siddiqui +26
Using light to control transient phases in quantum materials is an emerging route to engineer new properties and functionality, with both thermal and non-thermal phases observed ou…
Complete crystallographic, spin-electronic and magnetic structure of (Co0.2Cr0.2Fe0.2Mn0.2Ni0.2)3O4: Unraveling the suppression of entropy in high entropy oxides
Abhishek Sarkar, Benedikt Eggert, Ralf Witte +12
High entropy oxides (HEOs) are a rapidly emerging class of functional materials consisting of multiple principal cations. The original paradigm of HEOs assumes cationic occupations…
Origin of the high Seebeck coefficient of the misfit [CaCoO][CoO] cobaltate from site-specific valency and spin-state determinations
Abdul Ahad, K. Gautam, S. S. Majid +4
Layered misfit cobaltate [CaCoO][CoO], which emerged as an important thermoelectric material~[A. C. Masset et al. Phys. Rev. B, 62, 166 (2000)], has been explo…
Damping of spinful excitons in LaCoO by thermal fluctuations: Theory and experiment
Atsushi Hariki, Ru-Pan Wang, Andrii Sotnikov +7
We present Co -edge resonant inelastic x-ray scattering (RIXS) of bulk LaCoO across the thermally-induced spin-state crossover around 100~K. Owing to a high energy resolut…
Unconventional Charge Density Wave Order in the Pnictide Superconductor Ba(NiCo)As
Sangjun Lee, Gilberto de la Pena, Stella X. -L. Sun +10
Ba(NiCo)As is a structural homologue of the pnictide high temperature superconductor, Ba(FeCo)As, in which the Fe atoms are replaced by Ni.…
Excitonic dispersion of the intermediate-spin state in LaCoO revealed by resonant inelastic X-ray scattering
Ru-Pan Wang, Atsushi Hariki, Andrii Sotnikov +9
More than 50 years ago the electron-hole attraction was proposed to drive narrow gap semiconductors or semimetals to a new phase, the excitonic insulator. The experimental proof of…
Electronic structure of Pr2MnNiO6 from x-ray photoemission, absorption and density functional theory
Padmanabhan Balasubramanian, Shalik Ram Joshi, Ruchika Yadav +9
The electronic structure of double perovskite Pr2MnNiO6 is studied using core x-ray photoelectron spectroscopy and x-ray absorption spectroscopy. The 2p x-ray absorption spectra sh…
Absorption and scattering by interstellar dust in the silicon K-edge of GX 5-1
S. T. Zeegers, E. Costantini, C. P. de Vries +6
We study the absorption and scattering of X-ray radiation by interstellar dust particles, which allows us to access the physical and chemical properties of dust. The interstellar d…
Jahn-Teller distortion driven magnetic polarons in magnetite
H. Y. Huang, Z. Y. Chen, R. -P. Wang +11
The first known magnetic mineral, magnetite (FeO), has unusual properties which have fascinated mankind for centuries; it undergoes the Verwey transition at $\s…
Energetic, spatial and momentum character of a buried interface: the two-dimensional electron gas between two metal oxides
S. Nemšák, G. Conti, A. X. Gray +32
The interfaces between two condensed phases often exhibit emergent physical properties that can lead to new physics and novel device applications, and are the subject of intense st…
Moment evolution across the ferromagnetic phase transition of giant magnetocaloric (Mn,Fe)2(P,Si,B) compounds
H. Yibole, F. Guillou, L. Caron +6
A strong electronic reconstruction resulting in a quenching of the Fe magnetic moments has recently been predicted to be at the origin of the giant magnetocaloric effect displayed…
Angular dependence of core hole screening in LiCoO2: A DFT+U calculation of the oxygen and cobalt K-edge x-ray absorption spectra
Amélie Juhin, Frank De Groot, György Vankó +2
Angular dependent core-hole screening effects have been found in the cobalt K-edge x-ray absorption spectrum of LiCoO2, using high-resolution data and parameter-free GGA+U calculat…
Spin-orbit induced mixed-spin ground state in NiO perovskites probed by XAS: new insight into the metal to insulator transition
C. Piamonteze, F. M. F. de Groot, H. C. N. Tolentino +4
We report on a Ni L edges x-ray absorption spectroscopy (XAS) study in NiO perovskites. These compounds exhibit a metal to insulator () transition as temperature…
The distribution of the doped holes in La2-xSrxCu1-yRuyO4-(delta)
Z. Hu, M. Knupfer, M. S. Golden +4
We present a systematic study of the perovskite-related system La2-xSrxCu1-yRuyO4 using Cu-L2,3, Ru-L2,3, and O-K x-ray absorption spectroscopy (XAS). This system can be regarded a…