Article
Chemistry, Physical
Emi Minamitani, Takuma Shiga, Makoto Kashiwagi, Ippei Obayashi
Summary: This study addresses the long-standing problem of quantifying the correlation between complex structures of amorphous materials and their physical properties. By combining topological data analysis, machine learning, and molecular dynamics simulations, the researchers were able to determine the relationship between the medium-range order (MRO) in amorphous Si and its thermal conductivity. The results provide a potential avenue for controlling material characteristics through the topology of nanostructures.
JOURNAL OF CHEMICAL PHYSICS
(2022)
Article
Physics, Multidisciplinary
Yonit Maroudas-Sacks, Liora Garion, Lital Shani-Zerbib, Anton Livshits, Erez Braun, Kinneret Keren
Summary: The study reveals that the nematic order of actin fibers in Hydra regeneration plays a crucial role in morphogenesis, with topological defects acting as organization centers for morphological feature development. Fibre alignment sets the regenerated body axis and defect sites form organizing centers for the developing body plan.
Article
Engineering, Mechanical
Yijie Liu, Liang Jin, Hongfa Wang, Dongying Liu, Yingjing Liang
Summary: In this study, topological interface states for subwavelength in-plane waves in elastic metamaterials were numerically investigated. The relationships among bandgap, effective mass, and effective stiffness were analyzed, and the manipulation of stop-bands and negative effective parameters by tuning the parameters of translational resonances was discussed. The study observed a topological phase transition from single mass-negative region to single stiffness-negative region, with a corresponding shift in parameter changing of Zak phase. The existence of characteristic behavior of topological interface elastic waves in the sub-wavelength region was confirmed.
INTERNATIONAL JOURNAL OF MECHANICAL SCIENCES
(2021)
Article
Physics, Multidisciplinary
Fridtjof Brauns, Henrik Weyer, Jacob Halatek, Junghoon Yoon, Erwin Frey
Summary: The study explores how wavelength selection in reaction-diffusion systems is achieved through a combination of coarsening processes and counteracting processes. By deriving a general coarsening criterion, it is found that coarsening is typically uninterrupted in systems that conserve mass.
PHYSICAL REVIEW LETTERS
(2021)
Article
Materials Science, Ceramics
Gaku Okuma, Satoshi Tanaka, Fumihiro Wakai
Summary: X-ray microtomography was used to study the microstructure evolution in 3D, revealing the relationship between the topology of pore networks and characteristic length with densification. The increase in characteristic length with decreasing genus in the intermediate stage results in domain coarsening. This coarsening is a natural consequence of pore evolution in viscous sintering, leading to a decrease in total surface area due to topological transformations.
JOURNAL OF THE EUROPEAN CERAMIC SOCIETY
(2022)
Article
Physics, Multidisciplinary
Claudio B. Caporusso, Leticia F. Cugliandolo, Pasquale Digregorio, Giuseppe Gonnella, Demian Levis, Antonio Suma
Summary: In this paper, we study the dynamics of clusters formed by active Brownian disks generated through motility-induced phase separation. By using a novel algorithm, we identify an aggregation mechanism that goes beyond Ostwald ripening and find a dynamic exponent describing cluster growth. These clusters, driven by self-propelled motion, form large fractal structures containing diverse hexatic orders, as well as smaller, orientationally uniform structures. A comparative study with a passive system highlights the significant differences brought by activity.
PHYSICAL REVIEW LETTERS
(2023)
Article
Multidisciplinary Sciences
Hanqing Zhao, Boris A. Malomed, Ivan I. Smalyukh
Summary: Zhao et al. have experimentally created and theoretically modeled soliton macromolecules called polyskyrmionomers, which resemble polymers and have strong inter-soliton binding similar to covalent chemical bonds. These new materials have potential applications in data storage and electro-optics.
NATURE COMMUNICATIONS
(2023)
Article
Optics
Christian Anker Rosiek, Guillermo Arregui, Anastasiia Vladimirova, Marcus Albrechtsen, Babak Vosoughi Lahijani, Rasmus Ellebaek Christiansen, Soren Stobbe
Summary: This study investigates the practical value of topological protection in reciprocal photonics. Measurements of propagation losses in valley-Hall topological waveguides in the slow-light regime show no evidence of topological protection against backscattering on structural defects. Light's unique properties support the development of photonic quantum technologies, optical interconnects, and novel sensors, but losses due to absorption or backscattering are a key limitation.
Article
Optics
Mingyu Ouyang, Linlin Lei, Lingjuan He, Tianbao Yu, Wenxing Liu, Tongbiao Wang, Qinghua Liao
Summary: This paper investigates the topological coupling and decoupling of PCWs based on valley photonic crystals. A novel topological wavelength demultiplexer is proposed, which exhibits high transmission efficiency and robustness against structural defects and perturbations.
OPTICS AND LASER TECHNOLOGY
(2022)
Article
Engineering, Electrical & Electronic
Yuanzhen Li, Zijian Zhang, Hongsheng Chen, Fei Gao
Summary: This article reports the realization of polarization-wavelength locked plasmonic topological edge states on the Su-Schrieffer-Heeger (SSH) model, and proposes two mechanisms. These results have potential applications in optical emitters and photonic devices.
PROGRESS IN ELECTROMAGNETICS RESEARCH-PIER
(2023)
Article
Materials Science, Multidisciplinary
Fanglin Tian, Junxiao Zhou, Qiang Wang, Zhaowei Liu
Summary: Recent progress in the Valley Hall insulator has shown nontrivial topology due to distinct valley index in 2D semiconductor systems. This study proposes a highly tunable topological phase transition using valley photonic crystals, achieved by breaking the inversion symmetry through refractive index changes in optical phase change material (OPCM) in a honeycomb lattice structure. Simulations demonstrate topological protection through light propagation at sharp corners and pseudo-spin photon coupling. Compared to other reconfigurable topological photonics, the proposed scheme offers wider bandwidth and greater tunability in both central bandgap frequency and topological phase transition. The platform holds great potential for practical applications in lasing, light sensing, and high-contrast tunable optical filters.
OPTICAL MATERIALS EXPRESS
(2023)
Article
Chemistry, Multidisciplinary
Shawulienu Kezilebieke, Viliam Vano, Md N. Huda, Markus Aapro, Somesh C. Ganguli, Peter Liljeroth, Jose L. Lado
Summary: By using moire patterns in van der Waals materials, we have successfully achieved a topological superconducting state. The magnetic moire pattern gives rise to Yu-Shiba-Rusinov minibands and periodic modulation of the Majorana edge modes.
Article
Geosciences, Multidisciplinary
Ping Lu, Clement Narteau, Zhibao Dong, Philippe Claudin, Sebastien Rodriguez, Zhishan An, Cyril Gadal, Sylvain Courrech du Pont
Summary: In this study, landscape-scale experiments conducted at the edge of the Gobi desert demonstrate the simultaneous development of various dune types under natural wind conditions. The researchers also found that the same wind regime can lead to two different dune orientations depending on sand availability, suggesting two independent dune growth mechanisms. The experimental field observations support existing theoretical models of dune dynamics, boosting confidence in their ability to predict dune evolution under different wind regimes and bed conditions.
GEOPHYSICAL RESEARCH LETTERS
(2022)
Article
Multidisciplinary Sciences
Rui Zhang, Ali Mozaffari, Juan J. de Pablo
Summary: Logic operations can be performed using topological defects in active matter. By combining activity patterns with specific surfaces, the formation and transport of defects can be controlled. This discovery offers the potential for computations and information transmission in active soft materials.
Article
Optics
Chen Zhao, Shaohua Dong, Qing Zhang, Yixuan Zeng, Guangwei Hu, Yongzhe Zhang
Summary: This study proposes a method to magnetically control the polarization singularities in momentum space in photonic crystal slabs with inversion spatial symmetry. The coupling between transverse electric and transverse magnetic modes induced by the magnetic field can close certain leaky channels and achieve specific polarization singularities.
Article
Nanoscience & Nanotechnology
Nick Daems, Daniel Choukroun, Pablo Merino, Clara Rettenmaier, Lien Pacquets, Arno Bergmann, Gonzalo Santoro, Luis Vazquez, Lidia Martinez, Beatriz Roldan Cuenya, Jose Angel Martin Gago, Tom Breugelmans
Summary: This study demonstrates the controlled synthesis of CuOx nanoparticles on gas diffusion electrodes using physical vapor deposition methods. By controlling the mass loading, they achieved a balance between methanation and multicarbon formation in a gas-fed CO2 electrolyzer. The study identifies the influence of oxygen flow rate and deposition time on the morphology of NP films and their impact on the governing CO2RR mechanism. These findings highlight the potential of SGAS-generated NP films for optimizing and scaling up CO2RR catalyst layers.
ACS APPLIED MATERIALS & INTERFACES
(2022)
Article
Chemistry, Physical
A. Redondo-Cubero, F. J. Palomares, K. Lorenz, J. Rubio-Zuazo, R. Huebner, F. J. Mompean, M. Garcia-Hernandez, G. R. Castro, L. Vazquez
Summary: This paper investigates the dynamics of the pattern induced on a silicon surface by oblique incidence of a 40 keV Fe ion beam. The results show that the Fe-induced pattern differs from two reference systems and exhibits a short hexagonal ordering structure. The metal pathway plays a critical role in determining the morphological, chemical, and magnetic properties of the patterns.
APPLIED SURFACE SCIENCE
(2022)
Review
Physics, Condensed Matter
L. Vazquez, A. Redondo-Cubero, K. Lorenz, F. J. Palomares, R. Cuerno
Summary: Surface nanopatterning induced by ion beam irradiation (IBI) is an effective nanostructuring technique that can induce patterns on large areas of various materials, with short processing time and low cost. This review focuses on the progress in IBI nanopatterning when the surface composition plays a relevant role, specifically with simultaneous co-deposition of foreign atoms. It also discusses advances in IBI of compound surfaces and IBI systems using non-noble gas ions.
JOURNAL OF PHYSICS-CONDENSED MATTER
(2022)
Article
Physics, Multidisciplinary
Javier Rakhi, Javier Munoz-Garcia, Rodolfo Cuerno, Subhendu Sarkar
Summary: This study investigates the dynamics of surface nanopatterning using low-energy ion beams, specifically intermittent ion beam sputtering. The results show that intermittent sputtering can create nanoripples on a silicon surface and a hierarchical triangular morphology under low-energy conditions. The ordering of ripples and the area of triangular structures depend on the sputtering intervals. In addition, all surfaces display height fluctuations at larger length scales. These findings can be explained using known properties of the nonlinear regime of surface evolution.
Article
Physics, Applied
David Sanchez-Manzano, S. Mesoraca, F. Cuellar, M. Cabero, S. Rodriguez-Corvillo, V Rouco, F. Mompean, M. Garcia-Hernandez, J. M. Gonzalez-Calbet, C. Feuillet-Palma, N. Bergeal, J. Lesueur, C. Leon, Javier E. Villegas, J. Santamaria
Summary: The recent discovery of a long-range unconventional Josephson effect between YBa2Cu3O7 high Tc cuprates separated by a manganite ferromagnet has revealed a novel triplet proximity effect. The temperature dependence of the critical current in planar Josephson junctions was examined, and it was found that the behavior of the critical current follows the predictions of traditional superconductor-normal metal-superconductor junctions, suggesting that triplet pairs in a ferromagnet are transported similarly to singlet pairs in a normal metal. This result calls for theoretical studies of the new triplet Josephson effect and highlights its potential in future superconducting spintronics.
SUPERCONDUCTOR SCIENCE & TECHNOLOGY
(2023)
Article
Materials Science, Coatings & Films
M. A. Garcia, R. Gago, M. Arroyo-Hernandez, E. H. de Laorden, M. Iglesias, D. Esteban-Mendoza, R. Cuerno, J. Rickards
Summary: This study investigated the impact of low-energy (1 keV) Ar+ ion-beam irradiation on the morphology of polycrystalline Ti disks. The surface topographies before and after irradiation were characterized using scanning electron microscopy (SEM) and mechanical profilometry. The choice of incident angle (alpha i) during irradiation resulted in different surface morphologies, with clear texturing observed in the irradiated Ti targets.
SURFACE & COATINGS TECHNOLOGY
(2023)
Article
Chemistry, Analytical
Ricardo Garsed, Luis Vazquez, Elena Casero, M. Dolores Petit-Dominguez, Carmen Quintana, Maria del Pozo
Summary: We have developed a flow injection system with multiple pulse amperometric detection for simultaneous analysis of sunset yellow and tartrazine. We have also developed an electrochemical sensor based on ReS2 nanosheets and diamond nanoparticles as the transducer. The sensor showed good response towards both colorants. The method exhibited good accuracy and precision with low detection limits.
Article
Materials Science, Multidisciplinary
Edwin Herrera, Beilun Wu, Evan O'Leary, Alberto M. Ruiz, Miguel Agueda, Pablo Garcia Talavera, Victor Barrena, Jon Azpeitia, Carmen Munuera, Mar Garcia-Hernandez, Lin-Lin Wang, Adam Kaminski, Paul C. Canfield, Jose J. Baldovi, Isabel Guillamon, Hermann Suderow
Summary: The orthorhombic compound AuSn4 is similar to the Dirac node arc semimetal PtSn4 in composition. Unlike PtSn4, AuSn4 is a superconductor with a critical temperature of T-c = 2.35 K. Recent measurements indicate quasi-two-dimensional superconducting behavior in AuSn4.
PHYSICAL REVIEW MATERIALS
(2023)
Article
Nanoscience & Nanotechnology
Roberto Munoz, Laia Leon-Boigues, Elena Lopez-Elvira, Carmen Munuera, Luis Vazquez, Federico Mompean, Jose Angel Martin-Gago, Irene Palacio, Mar Garcia-Hernandez
Summary: The modification of graphene surface with polymers allows for expanding its applications as a hybrid material. However, the chemical inertness of graphene poses a challenge for covalent functionalization. Researchers have developed a clean and scalable method to enhance the graphene chemical activity and synthesized a large-scale graphene-polymer hybrid material.
ACS APPLIED MATERIALS & INTERFACES
(2023)
Article
Chemistry, Analytical
Eva Perez, Luis Vazquez, Carmen Quintana, Maria Dolores Petit-Dominguez, Elena Casero, Elias Blanco
Summary: In this study, we investigated the use of manganese (II) phosphate (MnP) as a catalyst for the determination of reactive oxygen species (ROS) in seminal plasma. The modification of a glassy carbon electrode with MnP showed an enhanced electrochemical response after the addition of superoxide. The combination of MnP and diamond nanoparticles yielded the best improvement in sensor response.
ANALYTICA CHIMICA ACTA
(2023)
Article
Mathematics
Angela Jimenez-Casas, Mario Castro, Manuel Villanueva-Pesqueira
Summary: This study investigates the influence of elasticity on the dynamics of chaotic systems by examining various models derived from mechanics, immunology, ecology, and rheology. The findings reveal that elasticity profoundly alters the chaotic dynamics of these systems, highlighting the non-trivial and non-monotonic role of elasticity in controlling or lack of control of chaotic behavior across different scales.
Article
Computer Science, Information Systems
Jaime Perez, Mario Castro, Gregorio Lopez
Summary: The gaming industry plays a crucial role in entertainment, but serious games have also been used for language learning, value conveyance, and skill training. The resurgence of AI and data science provides an opportunity for integrating them into video games. This paper aims to explore the intersection of serious games, AI, and computational social science as novel research tools to understand human behavior and society.
Article
Physics, Multidisciplinary
Ricardo Gutierrez, Rodolfo Cuerno
Summary: This study reveals the dynamical process of how an oscillator lattice reaches synchronization by considering it as a discrete growing interface. The synchronization of oscillator lattices exhibits space-time criticality, irrespective of parameter values, and falls into universality classes of kinetically rough interfaces. The critical properties, such as scaling exponent values and probability distribution functions, are innovative and strongly correlated with low-dimensional systems.
PHYSICAL REVIEW RESEARCH
(2023)
Article
Physics, Multidisciplinary
Francisco Martin-Vega, Edwin Herrera, Beilun Wu, Victor Barrena, Federico Mompean, Mar Garcia-Hernandez, Paul C. Canfield, Annica M. Black-Schaffer, Jose J. Baldovi, Isabel Guillamon, Hermann Suderow
Summary: The electronic band structure of Au2Pb features a Dirac cone which closes when it transitions into a low temperature superconducting phase, indicating possible topological properties at the surface. Scanning Tunneling Microscopy experiments on the superconducting surface reveal a sizable superconducting density of states at the Fermi level, possibly induced by surface states.
PHYSICAL REVIEW RESEARCH
(2022)
