Explanipedia

First-order phase transition driven by competing charge-order fluctuations in 1T'-TaTe$_{2}$ Open

Sanjoy Kr Mahatha, A. K. Kar, Javier Corral-Sertal, Josu Diego, A. N. Korshunov , et al. · 2025

First-order phase transitions, characterized by a discontinuous change in the order parameter, are intriguing phenomena in condensed matter physics. However, the underlying, material-specific, microscopic mechanisms often remain unclear. H…

Incipient Ionic Conductors: Ion‐Constrained Lattices Achieving Superionic‐Like Thermal Conductivity Through Extreme Anharmonicity Open

Yongheng Li, Qiuchun Lu, Bin Wei, Cong Lu, Xingang Jiang , et al. · 2025

Phonon liquid‐like thermal conduction in the solid state enables superionic conductors to serve as efficient thermoelectric device candidates. While liquid‐like motion of ions effectively suppresses thermal conductivity ( κ ), their high m…

Hybridization of lattice and charge order excitations in a superconducting cuprate Open

S. M. Souliou, Daisuke Ishikawa, R. Heid, Dimitrios Bessas, Hun-ho Kim , et al. · 2025

The ubiquitous tendency of superconducting cuprates to form charge density waves (CDWs) has reignited interest in the nature of their electron-phonon interaction and its role in shaping their phase diagrams. While pronounced dispersion ano…

Phonon anomaly and local distortion in iron-manganese-based Elinvar alloys Open

Y. Umemoto, Yoichi Ikeda, T. Honda, Daisuke Ishikawa, John Schneeloch , et al. · 2025

This paper examines the phonon dispersion and static local atomic distortion of iron-manganese-based Elinvar alloys using high-resolution inelastic X-ray scattering, magnetization, neutron diffraction, and neutron total scattering. In this…

First-order preemptive Ising-nematic transition in Open

Nathan Giles-Donovan, Y. Chen, Hiroshi Fukui, Taishun Manjo, Daisuke Ishikawa , et al. · 2025

Employing inelastic x-ray scattering and neutron scattering techniques, we observed nematic and magnetic phase transitions with distinct characters in K5Fe4Ag6Te10. Upon cooling, the nematic order undergoes a strongly first-order phase tra…

OCD -Machine learning based metrology for copper pad surface for hybrid bonding integration Open

Justine Grasland, Robin Poirot, Alfred Q. R. Baron, Nicolas Ranger, Sébastien Mermoz , et al. · 2025

International audience

Efficient storage of sparse image data in a human-readable format Open

Taishun Manjo, Alfred Q. R. Baron · 2025

The modern image formats used in recent position sensitive X-ray detectors are not suited to handling sparse image data, with only a few photons per frame, and then often must store vast amounts of data (~ terabyte), even if the meaningful…

Space Charge Doping Induced Band Modulation in Mono- and Bi-layer Graphene: a nano-ARPES study Open

Imtiaz Noor Bhatti, J. Ávila, Zhongxue Chen, Alfred Q. R. Baron, Shengbai Zhang , et al. · 2025

Controlled modulation of electronic band structure in two-dimensional (2D) materials via doping is crucial for devices fabrication. For instance doped graphene has been envisaged for various applications like sensors, super-capacitors, tra…

Sound Velocities of the Hydrous Iron‐Rich HH1‐Phase: Implications for Lower Mantle Seismic Heterogeneities Open

Lu Liu, Alfred Q. R. Baron, Eiji Ohtani, Hiroshi Fukui, Daijo Ikuta , et al. · 2024

We investigated the compressional and shear velocities, V P and V S , of the HH1‐phase by combining the inelastic x‐ray scattering and x‐ray diffraction experiments. In the pressure range of 64.7–79.6 GPa and at room temperature, the V P a…

Phonons reveal coupled cholesterol-lipid dynamics in ternary membranes Open

J.E.F. Fitzgerald, Dmytro Soloviov, Yong Q. Cai, Frederick A. Heberle, Daisuke Ishikawa , et al. · 2024

Absence of Acoustic Phonon Anomaly in a Kagome Metal with Short-ranged Structural Modulation Open

Weiliang Yao, Supeng Liu, Zifan Xu, Daisuke Ishikawa, Zehao Wang , et al. · 2024

Kagome lattice $A$V$_3$Sb$_5$ ($A$ = K, Rb, and Cs) superconductors without magnetism from vanadium $d$-electrons are intriguing because they have a novel charge density wave (CDW) order around 90 K and display superconductivity at $\sim$3…

Charge Density Fluctuations with Enhanced Superconductivity at the Proposed Nematic Quantum Critical Point Open

Youzhe Chen, Nathan Giles-Donovan, Jiayu Guo, R. Chen, Hiroshi Fukui , et al. · 2024

A quantum critical point (QCP) represents a continuous phase transition at absolute zero. At the QCP of an unconventional superconductor, enhanced superconducting transition temperature and magnetic fluctuations strength are often observed…

Enhanced Cryogenic Thermoelectricity in Semimetal Ta2PdSe6 through Non‐Fermi Liquid‐Like Charge and Heat Transport Open

Fumiaki Kato, Urara Maruoka, Akitoshi Nakano, Taishun Manjo, Daisuke Ishikawa , et al. · 2024

The thermal properties of semimetal Ta 2 PdSe 6 are studied, which exhibits a large thermoelectric power factor at low temperatures, by combining chemical substitution, transport measurements, and inelastic X‐ray scattering. A serious viol…

Phonon excitations in Eu2Ir2O7 probed by inelastic x-ray scattering Open

Han Wang, Ryoma Kaneko, Kentaro Ueda, Yang Zhang, Alfred Q. R. Baron , et al. · 2024

The study of phonon dynamics and its interplay with magnetic ordering is crucial for understanding the unique quantum phases in the pyrochlore iridates. Here, through inelastic x-ray scattering on a single crystal sample of the pyrochlore …

Investigating meV-scale Equilibrium Atomic Dynamics with X-Rays: focus on disordered materials Open

Alfred Q. R. Baron · 2024

This paper reviews non-resonant meV-resolved inelastic x-ray scattering (IXS) as a complementary method to inelastic neutron scattering (INS). Two aspects of IXS that are notable in this context are (1) that IXS allows straightforward meas…

Real-space local self-motion of protonated and deuterated water Open

Yuya Shinohara, Takuya Iwashita, Masahiro Nakanishi, Wojciech Dmowski, Chae Woo Ryu , et al. · 2024

We report on the self-part of the Van Hove correlation function, the correlation function describing the dynamics of a single molecule, of water and deuterated water. The correlation function is determined by transforming inelastic scatter…

Collective dynamics of liquid sulphur across the polymerisation transition temperature probed by inelastic x-ray scattering Open

Shinya Hosokawa, Yoshinori Katayama, Satoshi Tsutsui, Alfred Q. R. Baron · 2024

Inelastic x-ray scattering (IXS) experiments on liquid sulphur were carried out below (140 ∘ C) and above (180 ∘ C) the polymerisation temperature T λ of about 159 ∘ C to investigate changes in the collective dynamics of this unique liquid…

Investigating meV-scale Equilibrium Atomic Dynamics with X-Rays Open

Alfred Q. R. Baron · 2024

Structural and Dynamical Changes in a Gd-Co Metallic Glass by Cryogenic Rejuvenation Open

Shinya Hosokawa, Jens R. Stellhorn, László Pusztai, Yoshikatsu Yamazaki, Jing Jiang , et al. · 2024

Structural and Dynamical Changes in a Gd-Co Metallic Glass by Cryogenic Rejuvenation Open

Shinya Hosokawa, Jens R. Stellhorn, László Pusztai, Yoshikatsu Yamazaki, Jing Jiang , et al. · 2023

To experimentally clarify the changes in structural and dynamic heterogeneities in a metallic glass (MG), Gd65Co35, by rejuvenation with a temperature cycling (cryogenic rejuvenation), high-energy x-ray diffraction (HEXRD), anomalous x-ray…

PyCSFex: an extensible Python three package for calculating x-ray structure factors in complex crystals Open

John P. Sutter, J.A. Pittard, Jacob Filik, Alfred Q. R. Baron · 2023

Near-perfect diffracting crystals have many uses in x-ray optics including as monochromators, energy analyzers, and phase retarders. The usefulness of a particular Bragg reflection is often related to its angular acceptance and efficiency,…

The false beat signal of a high-speed X-ray imaging detector for synchrotron radiation experiments and its elimination with a synchronized CITIUS detector Open

H. Nishino, Kazuo Kobayashi, Yoshiaki Honjo, Toshiyuki Nishiyama, Kyosuke Ozaki , et al. · 2023

Recent advances in high-speed X-ray imaging detectors for synchrotron radiation experiments have enabled frame rates to exceed 10 kframes/s. The frame rates are getting closer to the revolution frequencies of the large-scale storage rings,…

Anomalous Shubnikov-de Haas effect and observation of the Bloch-Grüneisen temperature in the Dirac semimetal ZrTe5 Open

Stanisław Gałeski, Koiti Araki, Ola Kenji Forslund, R. Wawrzyńczak, Henry F. Legg , et al. · 2023

Appearance of quantum oscillations (QO) in both thermodynamic and transport properties of metals at low temperatures is the most striking experimental consequence of the existence of a Fermi surface (FS). The frequency of these oscillation…

Density deficit of Earth’s core revealed by a multimegabar primary pressure scale Open

Daijo Ikuta, Eiji Ohtani, Hiroshi Fukui, Tatsuya Sakamaki, R. Heid , et al. · 2023

An accurate pressure scale is a fundamental requirement to understand planetary interiors. Here, we establish a primary pressure scale extending to the multimegabar pressures of Earth’s core, by combined measurement of the acoustic velocit…

Observation of long-range anisotropy in a vapor-deposited metallic glass Open

Peihao Sun, Alessandro Martinelli, A. P. Melnikov, Manfred Burghammer, Jerzy Antonowicz , et al. · 2023

Collective excitations in a melt of fast phase change material GeCu2Te3 Open

Masanori Inui, Shinya Hosokawa, Satoshi Tsutsui, Yoichi Nakajima, Kazuhiro Matsuda , et al. · 2023

Inelastic x-ray scattering measurements have been carried out to investigate atomic dynamics in a melt of fast phase change material GeCu 2 Te 3 . The dynamic structure factor was analysed using the model function with three damped harmoni…

Experimental observation of mesoscopic fluctuations to identify origin of thermodynamic anomalies of ambient liquid water Open

Y. Kajihara, Masanori Inui, Kazuhiro Matsuda, Daisuke Ishikawa, Satoshi Tsutsui , et al. · 2023

We report an experimental observation of mesoscopic fluctuations underlying the thermodynamic anomalies of ambient liquid water. The combination of two sound-velocity-measurement methods with largely different frequencies, namely inelastic…

Dynamic Lone Pair Expression as Chemical Bonding Origin of Giant Phonon Anharmonicity in Thermoelectric InTe Open

Jiawei Zhang, Daisuke Ishikawa, Michael Marek Koza, Eiji Nishibori, Lirong Song , et al. · 2023

Loosely bonded (“rattling”) atoms with s 2 lone pair electrons are usually associated with strong anharmonicity and unexpectedly low thermal conductivity, yet their detailed correlation remains largely unknown. Here we resolve this correla…

Sound velocity of hexagonal close-packed iron to the Earth’s inner core pressure Open

Daijo Ikuta, Eiji Ohtani, Hiroshi Fukui, Takeshi Sakai, Daisuke Ishikawa , et al. · 2022

Data for "Sound velocity of hexagonal close-packed iron to the Earth's inner core pressure" Open

Daijo Ikuta, Eiji Ohtani, Hiroshi Fukui, Takeshi Sakai, Daisuke Ishikawa , et al. · 2022

This file is the dataset used in the article "Sound velocity of hexagonal close-packed iron to the Earth's inner core pressure", Nat. Commun. 13, 7211 (2022). https://doi.org/10.1038/s41467-022-34789-2

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