Condensed Matter最新文献

Remarks on the Quantum Effects of Screw Dislocation Topology and Missing Magnetic Flux 关于螺旋位错拓扑和缺失磁通量的量子效应的评论

Condensed Matter Pub Date : 2024-08-08 DOI: 10.3390/condmat9030033

K. Bakke

引用次数: 0

Enhancing the Photoelectrochemical Performance of a Superlattice p–n Heterojunction CuFe2O4/ZnFe2O4 Electrode for Hydrogen Production 提高用于制氢的超晶格 p-n 异质结铜铁氧化物/锌铁氧化物电极的光电化学性能

Condensed Matter Pub Date : 2024-07-26 DOI: 10.3390/condmat9030031

M. K. Al Turkestani

{"title":"Enhancing the Photoelectrochemical Performance of a Superlattice p–n Heterojunction CuFe2O4/ZnFe2O4 Electrode for Hydrogen Production","authors":"M. K. Al Turkestani","doi":"10.3390/condmat9030031","DOIUrl":"https://doi.org/10.3390/condmat9030031","url":null,"abstract":"A p–n heterojunction film consisting of p-type CuFe2O4 and n-type ZnFe2O4 was fabricated in this study. The n-type ZnFe2O4 film was deposited on a stainless steel substrate using the spray pyrolysis method, after which a top layer of p-type CuFe2O4 thin film was deposited and annealed. Characterization techniques, such as X-ray diffraction, scanning electron microscopy, UV–Vis diffuse reflectance spectroscopy, and photoluminescence, confirmed the formation of a superlattice p–n heterojunction between CuFe2O4 and ZnFe2O4. Photoelectrochemical measurements were conducted to investigate the photoelectrochemical properties of the samples, resulting in a photocurrent of 1.2 mA/cm2 at 1.5 V (vs. Ag/AgCl) under illumination from a 100-watt LED light source. Utilizing the p–n junction of CuFe2O4/ZnFe2O4 as a photoanode increased the hydrogen production rate by 30% compared to that of the dark measurement. This enhancement in performance was attributed to the potential barrier at the p–n heterojunction interface, which improved the separation of photoinduced electron–hole pairs and facilitated a more efficient charge transfer. Additionally, coating the stainless steel electrode with this ferrite sample improved both the corrosion resistance and the stability of hydrogen production over extended operation times.","PeriodicalId":505256,"journal":{"name":"Condensed Matter","volume":"40 14","pages":""},"PeriodicalIF":0.0,"publicationDate":"2024-07-26","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"141800391","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

The EuAPS Betatron Radiation Source: Status Update and Photon Science Perspectives EuAPS 贝塔射线辐射源：最新状况和光子科学展望

Condensed Matter Pub Date : 2024-07-22 DOI: 10.3390/condmat9030030

Federico Galdenzi, M. Anania, A. Balerna, Richard J. Bean, A. Biagioni, Claudio Bortolin, L. Brombal, Francesco Brun, Marcello Coreno, Gemma Costa, Lucio Crincoli, Alessandro Curcio, M. Del Giorno, Enrico Di Pasquale, Gianluca di Raddo, Valentina Dompè, S. Donato, Zeinab Ebrahimpour, A. Falone, A. Frazzitta, M. Galletti, A. Ghigo, Stefano Lauciani, Andrea Liedl, V. Lollo, A. Marcelli, E. Principi, A. Rossi, Federica Stocchi, F. Villa, Marco Zottola, A. Cianchi, F. Stellato, M. Ferrario

{"title":"The EuAPS Betatron Radiation Source: Status Update and Photon Science Perspectives","authors":"Federico Galdenzi, M. Anania, A. Balerna, Richard J. Bean, A. Biagioni, Claudio Bortolin, L. Brombal, Francesco Brun, Marcello Coreno, Gemma Costa, Lucio Crincoli, Alessandro Curcio, M. Del Giorno, Enrico Di Pasquale, Gianluca di Raddo, Valentina Dompè, S. Donato, Zeinab Ebrahimpour, A. Falone, A. Frazzitta, M. Galletti, A. Ghigo, Stefano Lauciani, Andrea Liedl, V. Lollo, A. Marcelli, E. Principi, A. Rossi, Federica Stocchi, F. Villa, Marco Zottola, A. Cianchi, F. Stellato, M. Ferrario","doi":"10.3390/condmat9030030","DOIUrl":"https://doi.org/10.3390/condmat9030030","url":null,"abstract":"The EuPRAXIA EU project is at the forefront of advancing particle accelerator research and the development of photon sources through innovative plasma acceleration approaches. Within this framework, the EuAPS project aims to exploit laser wakefield acceleration to build and operate a betatron radiation source at the INFN Frascati National Laboratory. The EuAPS source will provide femtosecond X-ray pulses in the spectral region between about 1 and 10 keV, unlocking a realm of experimental ultrafast methodologies encompassing diverse imaging and X-ray spectroscopy techniques. This paper presents a description of the EuAPS betatron source, including simulations of the photon beam parameters, outlines the preliminary design of the dedicated photon beamline, and provides an insightful overview of its photon science applications.","PeriodicalId":505256,"journal":{"name":"Condensed Matter","volume":"26 9","pages":""},"PeriodicalIF":0.0,"publicationDate":"2024-07-22","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"141816857","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

The Nature of Pointer States and Their Role in Macroscopic Quantum Coherence 指针态的性质及其在宏观量子相干中的作用

Condensed Matter Pub Date : 2024-07-17 DOI: 10.3390/condmat9030029

P. Turner, Laurent Nottale

{"title":"The Nature of Pointer States and Their Role in Macroscopic Quantum Coherence","authors":"P. Turner, Laurent Nottale","doi":"10.3390/condmat9030029","DOIUrl":"https://doi.org/10.3390/condmat9030029","url":null,"abstract":"This article begins with an interdisciplinary review of a hydrodynamic approach to understanding the origins and nature of macroscopic quantum phenomena in high-temperature superconductivity, superfluidity, turbulence and biological systems. Building on this review, we consider new theoretical insights into the origin and nature of pointer states and their role in the emergence of quantum systems. The approach includes a theory of quantum coherence underpinned by turbulence, generated by a field of pointer states, which take the form of recirculating, spin-1/2 vortices (toroids), interconnected via a cascade of spin-1 vortices. Decoherence occurs when the bosonic network connecting pointer states is disrupted, leading to their localisation. Building further on this work, we explore how quantum particles (in the form of different vortex structures) could emerge as the product of a causal dynamic process, within a turbulent (fractal) spacetime. The resulting particle structures offer new insights into intrinsic spin, the probabilistic nature of the wave function and how we might consider pointer states within the standard “point source” representation of a quantum particle, which intuitively requires a more complexed description.","PeriodicalId":505256,"journal":{"name":"Condensed Matter","volume":" 6","pages":""},"PeriodicalIF":0.0,"publicationDate":"2024-07-17","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"141831063","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Microstructure and Unusual Ferromagnetism of Epitaxial SnO2 Films Heavily Implanted with Co Ions 严重植入钴离子的外延二氧化锡薄膜的微观结构和非同寻常的铁磁性

Condensed Matter Pub Date : 2024-06-11 DOI: 10.3390/condmat9020027

R. Khaibullin, A. Gumarov, Iskander R. Vakhitov, A A Sukhanov, Nikolay M. Lyadov, A. Kiiamov, Dilyara M. Kuzina, Valery V. Bazarov, A. Zinnatullin

{"title":"Microstructure and Unusual Ferromagnetism of Epitaxial SnO2 Films Heavily Implanted with Co Ions","authors":"R. Khaibullin, A. Gumarov, Iskander R. Vakhitov, A A Sukhanov, Nikolay M. Lyadov, A. Kiiamov, Dilyara M. Kuzina, Valery V. Bazarov, A. Zinnatullin","doi":"10.3390/condmat9020027","DOIUrl":"https://doi.org/10.3390/condmat9020027","url":null,"abstract":"In this work, we have studied the microstructure and unusual ferromagnetic behavior in epitaxial tin dioxide (SnO2) films implanted with 40 keV Co+ ions to a high fluence of 1.0 × 1017 ions/cm2 at room or elevated substrate temperatures. The aim was to comprehensively understand the interplay between cobalt implant distribution, crystal defects (such as oxygen vacancies), and magnetic properties of Co-implanted SnO2 films, which have potential applications in spintronics. We have utilized scanning electron microscopy (SEM), X-ray diffraction (XRD), X-ray photoelectron spectroscopy (XPS), vibrating sample magnetometry (VSM), differential thermomagnetic analysis (DTMA), and ferromagnetic resonance (FMR) to investigate Co-implanted epitaxial SnO2 films. The comprehensive experimental investigation shows that the Co ion implantation with high cobalt concentration induces significant changes in the microstructure of SnO2 films, leading to the appearance of ferromagnetism with the Curie temperature significantly above the room temperature. We also established a strong influence of implantation temperature and subsequent high-temperature annealing in air or under vacuum on the magnetic properties of Co-implanted SnO2 films. In addition, we report a strong chemical effect of ethanol on the FMR spectra. The obtained results are discussed within the model of two magnetic layers, with different concentrations and valence states of the implanted cobalt, and with a high content of oxygen vacancies.","PeriodicalId":505256,"journal":{"name":"Condensed Matter","volume":"32 5","pages":""},"PeriodicalIF":0.0,"publicationDate":"2024-06-11","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"141355470","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Enhancing Spectroscopic Experiment Calibration through Differentiable Programming 通过可微分编程加强光谱实验校准

Condensed Matter Pub Date : 2024-06-05 DOI: 10.3390/condmat9020026

F. Napolitano

引用次数: 0

Meeting and Working with K. Alex Müller: Personal Memories 与 K. Alex Müller 的会面和合作：个人回忆

Condensed Matter Pub Date : 2024-05-08 DOI: 10.3390/condmat9020024

A. Bussmann-Holder, Hugo Keller

引用次数: 0

Experimental Study on Coefficient of Restitution of Small-Sized Spherical Particles during Low-Speed Impact 小尺寸球形颗粒在低速冲击过程中的重置系数实验研究

Condensed Matter Pub Date : 2024-03-05 DOI: 10.3390/condmat9010018

Tuo Li, Ran Li, Zhipeng Chi, Yuting Zhang, Hui Yang

{"title":"Experimental Study on Coefficient of Restitution of Small-Sized Spherical Particles during Low-Speed Impact","authors":"Tuo Li, Ran Li, Zhipeng Chi, Yuting Zhang, Hui Yang","doi":"10.3390/condmat9010018","DOIUrl":"https://doi.org/10.3390/condmat9010018","url":null,"abstract":"This study presents experimental investigations on the normal restitution coefficients of a titanium bead (Ti), zirconia bead (ZrO2), and amorphous zirconium alloy sphere (Amor). The research explores the influence of particle diameter and collision velocity on the normal restitution coefficient between two independent, identical spherical particles of different materials. The experimental findings demonstrate that increasing the particle diameter results in more effective plastic deformation, leading to higher energy losses and, subsequently, smaller coefficients of restitution. Similarly, higher particle velocities cause more energy dissipation during collisions, resulting in smaller restitution coefficients. Comparing particles of different materials, those with larger yield strengths exhibit more elastic behavior, experience less initial energy loss due to deformation, and reach the maximum restitution coefficient (elastic state) with fewer collisions. This finding suggests that material properties significantly influence the overall energy dissipation and elastic response in the particles. To validate the experimental results, existing models are compared and discussed. Furthermore, potential physical mechanisms responsible for the observed behavior are explored, providing valuable insights into the collision dynamics in spherical particle interactions. Overall, this study contributes to a better understanding of the factors affecting the normal restitution coefficient in particle collisions, enabling the design and optimization of particle systems for diverse applications in condensed matter and related fields.","PeriodicalId":505256,"journal":{"name":"Condensed Matter","volume":"112 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2024-03-05","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"140079330","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

The Shrinking Fermi Liquid Scenario for Strange-Metal Behavior from Overdamped Optical Phonons 过阻尼光学声子奇异金属行为的收缩费米液体方案

Condensed Matter Pub Date : 2024-02-06 DOI: 10.3390/condmat9010014

G. Mirarchi, M. Grilli, Götz Seibold, S. Caprara

引用次数: 0

The Shrinking Fermi Liquid Scenario for Strange-Metal Behavior from Overdamped Optical Phonons 过阻尼光学声子奇异金属行为的收缩费米液体方案

Condensed Matter Pub Date : 2024-02-06 DOI: 10.3390/condmat9010014

G. Mirarchi, M. Grilli, Götz Seibold, S. Caprara

引用次数: 0