1.3k citations · 2.5k across the 31 of their papers we have counts for
31 papers
Photoinduced Nonequilibrium Dynamics in Charge Ordered Materials
Linghua Zhu, Tsezar F. Seman, Michel van Veenendaal +1
We study the nonequilibrium dynamics of photoinduced phase transitions in charge ordered (CO) systems with a strong electron-lattice interaction and analyze the interplay between e…
Pressure-tuning of bond-directional exchange interactions and magnetic frustration in hyperhoneycomb iridate -
L. S. I. Veiga, M. Etter, K. Glazyrin +14
We explore the response of Ir orbitals to pressure in -, a hyperhoneycomb iridate in proximity to a Kitaev quantum spin liquid (QSL) ground state. X-ray…
Pressure-Induced Confined Metal from the Mott Insulator Sr3Ir2O7
Yang Ding, Liuxiang Yang, Cheng-Chien Chen +12
The spin-orbit Mott insulator Sr3Ir2O7 provides a fascinating playground to explore insulator-metal transition driven by intertwined charge, spin, and lattice degrees of freedom. H…
Using Nonequilibrium Dynamics to Probe Competing Orders in a Mott-Peierls System
Yao Wang, Brian Moritz, Cheng-Chien Chen +3
Competition between ordered phases, and their associated phase transitions, are significant in the study of strongly correlated systems. Here we examine one aspect, the nonequilibr…
Ultrafast intersystem crossing in nickel porphyrins
Javier Fernandez-Rodriguez, Jun Chang, Arthur J. Fedro +1
We study the relaxation dynamics and intersystem-crossing to the metastable state in laser-pumped tetra and hexa-coordinated nickel porphyrins. We use a ligand-field model which ta…
The many faces of quantum kagome materials: Interplay of further-neighbour exchange and Dzyaloshinskii-Moriya interaction
Tsezar F. Seman, Cheng-Chien Chen, Rajiv R. P. Singh +1
The field of frustrated magnetism has been enriched significantly by the discovery of various kagome lattice compounds. These materials exhibit a great variety of macroscopic behav…
RIXS and excited states calculation with the Xclaim code
Javier Fernandez-Rodriguez, Brian Toby, Michel van Veenendaal
We discuss the calculation of resonant inelastic x-ray scattering (RIXS) with Xclaim, a multi-plaform code for the calculation of core-hole spectroscopy based on a ligand-field mul…
Two-Level Rectilinear Steiner Trees
Stephan Held, Nicolas Kämmerling
Given a set of terminals in the plane and a partition of into subsets , a two-level rectilinear Steiner tree consists of a rectilinear Steiner tree …
Xclaim: a graphical interface for the calculation of core-hole spectroscopies
Javier Fernandez-Rodriguez, Brian Toby, Michel van Veenendaal
Xclaim (x-ray core level atomic multiplets) is a graphical interface for the calculation of core-hole spectroscopy and ground state properties within a charge-transfer multiplet mo…
Mixed configuration ground state in Iron(II) Phthalocyanine
Javier Fernandez-Rodriguez, Brian Toby, Michel van Veenendaal
We calculate the angular dependence of the x-ray linear and circular dichroism at the edges of -Fe(II) Phthalocyanine (FePc) thin films using a ligand field model with…
Fractionalization, entanglement, and separation: understanding the collective excitations in a spin-orbital chain
Cheng-Chien Chen, Michel van Veenendaal, Thomas P. Devereaux +1
Using a combined analytical and numerical approach, we study the collective spin and orbital excitations in a spin-orbital chain under a crystal field. Irrespective of the crystal…
A Novel High-Pressure Monoclinic Metallic Phase of V2O3
Yang Ding, Cheng-Chien Chen, Qiaoshi Zeng +11
Vanadium sesquioxide, V2O3, is a prototypical metal-to-insulator system where, in temperature-dependent studies, the transition always coincides with a corundum-to-monoclinic struc…
Momentum dependence in K-edge resonant inelastic x-ray scattering and its application to screening dynamics in CE-phase LaSrMnO
T. F. Seman, X. Liu, J. P. Hill +2
We present a formula for the calculation of K-edge resonant inelastic x-ray scattering on transition metal compounds, based on a local interaction between the valence shell electro…
Strain mediated suppression of the metal-insulator transition in EuNiO3 thin films
D. Meyers, S. Middey, M. Kareev +5
Ultrathin epitaxial films of EuNiO3 were grown on a series of substrates traversing highly compressive (- 2.4%) to highly tensile (2.5%) lattice mismatch. X-ray diffraction measure…
Fermi level density of states modulation without charge transfer in nickelate superlattices
Myung Joon Han, Michel van Veenendaal
By using first-principles density functional theory calculations for (LaNiO3)m/(SrTiO3)n superlattices, we report a systematic way of electronic response to the interface geometry.…
Strongly momentum-dependent screening dynamics in LaSrMnO observed with resonant inelastic x-ray scattering
X. Liu, T. F. Seman, K. H. Ahn +6
We report strongly momentum-dependent local charge screening dynamics in CE-type charge, orbital, and spin ordered LaSrMnO, based on Mn K-edge resonant inelasti…
Spin moment formation and reduced orbital polarization in LaNiO/LaAlO superlattice: LDA+U study
Myung Joon Han, Michel van Veenendaal
Density functional band calculations have been performed to study LaNiO/LaAlO superlattices. Motivated by recent experiments reporting the magnetic and metal-insulator phas…
Isospin Dynamics in Sr2IrO4 : Forging Links to Cuprate Superconductivity
Jungho Kim, D. Casa, M. H. Upton +8
We used resonant inelastic x-ray scattering to reveal the nature of magnetic interactions in Sr2IrO4, a 5d transition-metal oxide with a spin-orbit entangled ground state and Jeff=…
Electronic structure and orbital polarization of LaNiO with a reduced coordination and under strain: first-principles study
Myung Joon Han, Michel van Veenendaal
First-principles density functional theory calculations have been performed to understand the electronic structure and orbital polarization of LaNiO with a reduced coordination…
Quantum confinement of Mott electrons in ultrathin LaNiO3/LaAlO3 superlattice
Jian Liu, S. Okamoto, M. van Veenendaal +5
We investigate the electronic reconstruction in (LaNiO)/(LaAlO) (n=3, 5 and 10) superlattices due to the quantum confinement (QC) by d.c. transport and resonant…
Determining the Electron-Phonon Coupling Strength in Correlated Electron Systems from Resonant Inelastic X-ray Scattering
Luuk J. P. Ament, Michel van Veenendaal, Jeroen van den Brink
We show that high resolution Resonant Inelastic X-ray Scattering (RIXS) provides direct, element-specific and momentum-resolved information on the electron-phonon (e-p) coupling st…
Observation of phonons with resonant inelastic x-ray scattering
H. Yavas, M. van Veenendaal, J. van den Brink +9
Phonons, the quantum mechanical representation of lattice vibrations, and their coupling to the electronic degrees of freedom are important for understanding thermal and electric p…
Resonant Inelastic X-ray Scattering Studies of Elementary Excitations
Luuk J. P. Ament, Michel van Veenendaal, Thomas P. Devereaux +2
In the past decade, Resonant Inelastic X-ray Scattering (RIXS) has made remarkable progress as a spectroscopic technique. This is a direct result of the availability of high-brilli…
A probability-conserving dissipative Schrödinger equation
Michel van Veenendaal, Jun Chang, A. J. Fedro
Dissipative effects on a microscopic level are included in the Schrödinger equation. When the decay between different local levels as a result of the coupling to a bath, the Schröd…