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The local environment and oxidation state of the Fe impurity in strontium titanate are studied using XAFS spectroscopy. The influence of annealing temperature and deviation from stoichiometry on the possibility of incorporation of the…

Materials Science · Physics 2023-02-27 I. A. Sluchinskaya , A. I. Lebedev

This work investigates the problematic diffusion of metal atoms into phase change chalcogenides, which can destroy resonances in photonic devices. Interfaces between Ge2Sb2Te5 and metal layers were studied using X-ray reflectivity (XRR) and…

Optics · Physics 2019-01-09 Li Lu , Weiling Dong , Jitendra K. Behera , Li Tian Chew , Robert E. Simpson

Compared to the widely investigated crystalline polymorphs of gallium oxide (Ga2O3), knowledge about its amorphous state is still limited. With the help of a machine-learning interatomic potential, we conducted large-scale atomistic…

Materials Science · Physics 2024-04-29 Jiahui Zhang , Junlei Zhao , Jesper Byggmästar , Erkka J. Frankberg , Antti Kuronen

In view of the strong anisotropy of oxygen diffusion in high-Tc ceramic YBa2Cu3Ox, it is supposed that a polycrystalline sample of this material can be presented as consisting of crystal grains where each grain was formed by a certain…

Materials Science · Physics 2007-05-23 Andrei Ivanov

Intense femtosecond x-ray pulses produced by an x-ray free-electron laser can trigger irreversible structural transitions in crystalline solids. For instance, irradiation of diamond can lead to graphitization and, at higher deposited doses,…

This study examines the application of transition metal-doped SrTiO3 in photovoltaic technologies, such as photocatalysis. The core objective is to evaluate how different dopants influence the structural and electronic characteristics of…

Materials Science · Physics 2024-10-15 Zdeněk Jansa , Lucie Prušáková , Štěpánka Jansová , Pavel Calta , Pavol Šutta , Ján Minár

Recently, it was established that a two-dimensional electron system can arise at the interface between two oxide insulators LaAlO3 and SrTiO3. This paradigmatic example exhibits metallic behaviour and magnetic properties between…

Strongly Correlated Electrons · Physics 2016-11-28 I. I. Piyanzina , Yu. V. Lysogorskiy , I. I. Varlamova , A. G. Kiiamov , T. Kopp , V. Eyert , O. V. Nedopekin , D. A. Tayurskii

In-situ X-ray scattering monitoring is carried out during temperature annealing on different densified SiO$_2$ glasses. Density fluctuations and intermediate range coherence from x-ray scattering (SAXS) and diffraction (WAXS) evidence a…

Chemical Physics · Physics 2024-02-09 Antoine Cornet , Christine Martinet , Valerie Martinez , Dominique de Ligny

Binary transition metal chalcogenides have attracted increasing attention for their unique structural and electronic properties. High pressure is powerful tool for tuning their crystal structure and electronic structure away from their…

Materials Science · Physics 2016-07-11 Zhao Zhao , Hua Wei , Wendy L. Mao

In this study, we investigate the ion-irradiation-induced phase transition in gallium oxide (Ga2O3) from the $\beta$ to the $\gamma$ phase, the role of defects during the transformation, and the quality of the resulting crystal structure.…

The electric field-dependence of structural dynamics in a tetragonal ferroelectric lead zirconate titanate thin film is investigated under sub-coercive and above-coercive fields using time-resolved X-ray diffraction. During the application…

Applied Physics · Physics 2019-05-22 C. Kwamen , M. Rössle , W. Leitenberger , M. Alexe , M. Bargheer

Development generating diffraction-related valuable expressions and formulas capable of initiating new era for diffraction and for scientific domains that use it provided. The main expression, among these, gives diffracted intensity as…

Materials Science · Physics 2021-03-16 Noureddine Hadji

Intercalation of two dimensional materials, particularly transition metal dichalcogenides, is a noninvasive way to modify electronic, optical and structural properties of these materials. However, research of these atomic-scale phenomena…

Many fundamental processes of structural changes at surfaces occur on a pico- or femtosecond time scale. In order to study such ultra-fast processes, we have combined modern surface science techniques with fs-laser pulses in a pump-probe…

Mesoscale and Nanoscale Physics · Physics 2023-12-01 Michael Horn von Hoegen

We have developed an experimental system to simultaneously observe surface structure, morphology, composition, chemical state, and chemical activity for samples in gas phase environments. This is accomplished by simultaneously measuring…

Instrumentation and Detectors · Physics 2021-04-21 H. Kersell , P. Chen , H. Martins , Q. Lu , F. Brausse , B. -H. Liu , M. Blum , S. Roy , B. Rude , A. Kilcoyne , H. Bluhm , S. Nemšák

An improved quantum trajectory Monte Carlo method involving the Stark shift of the initial state, Coulomb potential, and multielectron polarization-induced dipole potential is used to revisit the origin of the low-energy interference…

Atomic Physics · Physics 2021-05-12 Weifeng Yang , Jie Li , Wenbin Jia , Hongdan Zhang , Xiwang Liu , Ming Zhu , Xiaohong Song , Jing Chen

Highly energetic ions that impact materials have applications from semiconductor industry to medicine, and are fundamentally interesting as they trigger multi-length and time-scale processes. In particular, they excite electrons into…

Materials Science · Physics 2025-07-24 Cheng-Wei Lee , André Schleife

We present a detailed study of the Ti 3$d$ carriers at the interface of LaAlO$_3$/SrTiO$_3$ heterostructures by high-resolution resonant inelastic soft x-ray scattering (RIXS), with special focus on the roles of overlayer thickness and…

Grazing incidence X-ray diffraction (GIXD) is widely used for the structural characterization of thin films, particularly for analyzing phase composition and the orientation distribution of crystallites. While various tools exist for…

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