A5083386671- Physics of Superconductivity and Magnetism
- Advanced Electron Microscopy Techniques and Applications
- Magneto-Optical Properties and Applications
- Magnetic properties of thin films
- Advanced Condensed Matter Physics
- Transition Metal Oxide Nanomaterials
- Electronic and Structural Properties of Oxides
- Magnetic and transport properties of perovskites and related materials
- Photosynthetic Processes and Mechanisms
- Electron and X-Ray Spectroscopy Techniques
- Catalysis and Oxidation Reactions
- Iron oxide chemistry and applications
- Topological Materials and Phenomena
- Spectroscopy and Quantum Chemical Studies
- X-ray Spectroscopy and Fluorescence Analysis
- Atomic and Subatomic Physics Research
- Porphyrin and Phthalocyanine Chemistry
- Photoreceptor and optogenetics research
Pohang University of Science and Technology
2021-2024
Pohang Accelerator Laboratory
2021-2023
Using light to control transient phases in quantum materials is an emerging route engineer new properties and functionality, with both thermal non-thermal observed out of equilibrium. Transient are expected be heterogeneous, either through photo-generated domain growth or by generating topological defects, this impacts the dynamics system. However, nanoscale heterogeneity has not been directly observed. Here we use time- spectrally resolved coherent X-ray imaging track prototypical induced...
Abstract The photoisomerization reaction of a fluorescent protein chromophore occurs on the ultrafast timescale. structural dynamics that result from femtosecond optical excitation have contributions vibrational and electronic processes involve crossing through conical intersection. creation progression strongly depends molecular parameters. When using X-ray crystallography as probe dynamics, origin observed nuclear motions is not known. Now, high-resolution pump–probe reveals complex...
In the version of this article initially published, y-axis range violin plots in Fig. 4a, now spanning between 0.0 and 1.0, spanned 0.2 1.0.Furthermore, leftmost panel, titled "Coupled Map Lattice (CML)," labels colours for five distributions dynamical regimes coupled map lattices were misplaced, which caused them to appear shuffled not agreement with main text results from 3a.
Using light to control transient phases in quantum materials is an emerging route engineer new properties and functionality, with both thermal non-thermal observed out of equilibrium. Transient are expected be heterogeneous, either through photo-generated domain growth or by generating topological defects, this impacts the dynamics system. However, nanoscale heterogeneity has not been directly observed. Here we use time- spectrally resolved coherent X-ray imaging track prototypical induced...
Ultrafast optical manipulation of magnetic phenomena is an exciting achievement mankind, expanding one's horizon knowledge toward the functional nonequilibrium states. The dynamics acting on extremely short timescale push detection limits that reveal fascinating light-matter interactions for nonthermal creation effective fields. While some cases are benchmarked by emergent transient behaviors, otherwise identifying effects remains challenging. Here, a femtosecond time-resolved resonant X-ray...
Understanding the interplay between charge, nematic, and structural ordering tendencies in cuprate superconductors is critical to unraveling their complex phase diagram. Using pump-probe time-resolved resonant X-ray scattering on (0 0 1) Bragg peak at Cu [Formula: see text] O resonances, we investigate nonequilibrium dynamics of nematic order its association with both charge density wave (CDW) lattice La[Formula: text]Eu[Formula: text]Sr[Formula: text]CuO[Formula: text]. The orbital...
Crystals with unique ionic arrangements and strong electronic correlations serve as a fertile ground for the emergence of exotic phases, evidenced by coexistence charge density wave (CDW) superconductivity in vanadium Kagome metals, specifically AV3Sb5 (where A represents K, Rb, or Cs). The formation star David CDW superstructure, resulting from coordinated displacements ions on corner sharing triangular lattice, has garnered significant attention efforts to comprehend influence electron...
Understanding the interplay between charge, nematic, and structural ordering tendencies in cuprate superconductors is critical to unraveling their complex phase diagram. Using pump-probe time-resolved resonant x-ray scattering on (0 0 1) Bragg peak at Cu $L_3$ O $K$ resonances, we investigate non-equilibrium dynamics of $Q_a = Q_b 0$ nematic order its association with both charge density wave (CDW) lattice La$_{1.65}$Eu$_{0.2}$Sr$_{0.15}$CuO$_4$. The orbital selectivity cross-section allows...
X-ray free electron lasers (XFEL) create femtosecond pulses with high brightness and longitudinal coherence allowing to extend spectroscopy scattering techniques into the ultrafast time-domain. These X-rays are a powerful probe for studying coherent quasiparticle excitations in condensed matter triggered by an impulsive optical laser pump. However, unlike phonons, other quasiparticles have been rarely observed due small signal changes lack of standards identification. Here, we exploit...
Abstract Ultrafast optical manipulation of magnetic phenomena is an exciting achievement mankind, expanding one’s horizon knowledge towards functional non-equilibrium states. The dynamics acting on extremely short timescale push the limit detection, and ultimately require four-dimensional (4D) views, i.e., 3D space 1D time to keep sight evolving structure thoroughly. Here we introduce time-resolved resonant X-ray diffraction with free electron laser accomplish 4D visualization a...