357 citations · 831 across the 14 of their papers we have counts for
13 papers · 1 filter
Photo-induced charge-transfer renormalization in NiO
Tobias Lojewski, Denis Golez, Katharina Ollefs +21
Photo-doped states in strongly correlated charge transfer insulators are characterized by - and - interactions and the resulting intertwined dynamics of charge excitati…
Charge disproportionation and nano phase separation in SrNiO
H. Guo, Z. W. Li, C. F. Chang +16
We have successfully grown centimeter-sized layered SrNiO single crystals under high oxygen pressures of 120 bar by the floating zone technique. This enabled us to perform n…
Direct observation of multi-spinon excitations outside of the two-spinon continuum in the antiferromagnetic spin chain cuprate Sr2CuO3
J. Schlappa, U. Kumar, K. J. Zhou +8
One-dimensional (1D) magnetic insulators have attracted significant interest as a platform for studying emergent phenomena such as quasiparticle fractionalization and quantum criti…
Orbital superexchange and crystal field simultaneously at play in YVO3: resonant inelastic x-ray scattering at the V L edge and the O K edge
E. Benckiser, L. Fels, G. Ghiringhelli +11
We report on the observation of orbital excitations in YVO3 by means of resonant inelastic x-ray scattering (RIXS) at energies across the vanadium L3 and oxygen K absorption edges.…
Spin-Orbital Separation in the quasi 1D Mott-insulator Sr2CuO3
J. Schlappa, K. Wohlfeld, K. J. Zhou +13
As an elementary particle the electron carries spin \hbar/2 and charge e. When binding to the atomic nucleus it also acquires an angular momentum quantum number corresponding to th…
Intrinsic and extrinsic x-ray absorption effects in soft x-ray diffraction from the superstructure in magnetite
C. F. Chang, J. Schlappa, M. Buchholz +9
We studied the (001/2) diffraction peak in the low-temperature phase of magnetite (Fe3O4) using resonant soft x-ray diffraction (RSXD) at the Fe-L2,3 and O-K resonance. We studied…
Evidence for core-hole-mediated inelastic x-ray scattering from metallic FeTe
J. N. Hancock, R. Viennois, D. van der Marel +9
We present a detailed analysis of resonant inelastic scattering (RIXS) from FeTe with unprecedented energy resolution. In contrast to the sharp peaks typically seen in in…
Static and fluctuating stripe order observed by resonant soft x-ray diffraction in La1.8Sr0.2NiO4
J. Schlappa, C. F. Chang, E. Schierle +11
We studied the stripe phase of La1.8Sr0.2NiO4 using neutron diffraction, resonant soft x-ray diffraction (RSXD) at the Ni L2,3 edges, and resonant x-ray diffraction (RXD) at the Ni…
Collective spin excitations in a quantum spin ladder probed by high-resolution Resonant Inelastic X-ray Scattering
J. Schlappa, T. Schmitt, F. Vernay +13
We investigate magnetic excitations in the spin-ladder compound SrCuO using high-resolution Cu -edge Resonant Inelastic X-ray Scattering (RIXS). Our findi…
Resonant soft x-ray scattering from stepped surfaces of SrTiO3
J. Schlappa, C. Schüßler-Langeheine, C. F. Chang +9
We studied the resonant diffraction signal from stepped surfaces of SrTiO3 at the Ti 2p -> 3d (L2,3) resonance in comparison with x-ray absorption (XAS) and specular reflectivity d…
Manipulating the magnetic structure by electric fields in multiferroic ErMn2O5
Y. Bodenthin, U. Staub, M. Garcia-Fernandez +5
Based on measurements of soft x-ray magnetic diffraction under in-situ applied electric field, wereport on significantly manipulation and exciting of commensurate magnetic order in…
Direct observation of t2g orbital ordering in magnetite
J. Schlappa, C. Schuessler-Langeheine, C. F. Chang +8
Using soft-x-ray diffraction at the site-specific resonances in the Fe L23 edge, we find clear evidence for orbital and charge ordering in magnetite below the Verwey transition. Th…
Spectroscopy of stripe order in La1.8Sr0.2NiO4 using resonant soft x-ray diffraction
C. Schuessler-Langeheine, J. Schlappa, A. Tanaka +13
Strong resonant enhancements of the charge-order and spin-order superstructure-diffraction intensities in La1.8Sr0.2NiO4 are observed when x-ray energies in the vicinity of the Ni…