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arXiv 2023年

作者： Zhao, Hanqing Malomed, boris A. Smalyukh, Ivan I. Department of Physics University of Colorado BoulderCO80309 United States Department of Physical Electronics School of Electrical Engineering Faculty of Engineering Center for Light-Matter Interaction Tel Aviv University P.O.B. 39040 Ramat Aviv Tel Aviv Israel Instituto de Alta Investigación Universidad de Tarapacá Casilla 7D Arica Chile Materials Science and Engineering Program University of Colorado BoulderCO80309 United States International Institute for Sustainability with Knotted Chiral Meta Matter Hiroshima University Higashi Hiroshima Hiroshima739-8526 Japan Renewable and Sustainable Energy Institute National Renewable Energy Laboratory University of Colorado BoulderCO80309 United States

being ubiquitous, solitons have particle-like properties, exhibiting behaviour often associated with atoms. bound solitons emulate dynamics of molecules, though solitonic analogues of polymeric materials have not been considered yet. Here we experimentally create and model soliton polymers, which we call "polyskyrmionomers", built of atom-like individual solitons characterized by the topological invariant representing the skyrmion number. With the help of nonlinear optical imaging and numerical modelling based on minimizing the free energy, we reveal how topological point defects bind the solitonic quasi-atoms into polyskyrmionomers, featuring linear, branched, and other macromolecule-resembling architectures, as well as allowing for encoding data by spatial distributions of the skyrmion number. Application of oscillating electric fields activates diverse modes of locomotion and internal vibrations of these self-assembled soliton structures, which depend on symmetry of the solitonic macromolecules. Our findings suggest new designs of soliton meta matter, with a potential for the use in fundamental research and technology. © 2023, CC bY.

关键词： Macromolecules

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Electron mobility of SnO2 from first principles

arXiv

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arXiv 2024年

作者： Wang, Amanda bushick, Kyle Pant, Nick Lee, Woncheol Zhang, Xiao Leveillee, Joshua Giustino, Feliciano Poncé, Samuel Kioupakis, Emmanouil Department of Materials Science and Engineering University of Michigan Ann ArborMI48109 United States Applied Physics Program University of Michigan Ann ArborMI48109 United States Department of Electrical and Computer Engineering University of Michigan Ann ArborMI48109 United States Oden Institute for Computational Engineering and Sciences The University of Texas at Austin AustinTX78712 United States Department of Physics The University of Texas at Austin AustinTX78712 United States European Theoretical Spectroscopy Facility Institute of Condensed Matter and Nanosciences Université catholique de Louvain Chemin des Étoiles 8 Louvain-la-NeuveB-1348 Belgium WEL Research Institute Avenue Pasteur 6 Wavre1300 Belgium

The transparent conducting oxide SnO2 is a wide bandgap semiconductor that is easily n-type doped and widely used in various electronic and optoelectronic applications. Experimental reports of the electron mobility of this material vary widely depending on the growth conditions and doping concentrations. In this work, we calculate the electron mobility of SnO2 from first principles to examine the temperature- and doping-concentration dependence, and to elucidate the scattering mechanisms that limit transport. We include both electron-phonon scattering and electron-ionized impurity scattering to accurately model scattering in a doped semiconductor. We find a strongly anisotropic mobility that favors transport in the direction parallel to the c-axis. At room temperature and intrinsic carrier concentrations, the low-energy polar-optical phonon modes dominate scattering, while ionized-impurity scattering dominates above 1018 cm-3 Copyright © 2024, The Authors. All rights reserved.

关键词： Electron mobility

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Neural Electrodes: Interfacing Conducting Polymer Nanotubes with the Central Nervous System: Chronic Neural Recording using Poly(3,4‐ethylenedioxythiophene) Nanotubes (Adv. Mater. 37/2009)

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Advanced materials 2009年第37期21卷

作者： Mohammad Reza Abidian Kip A. Ludwig Timothy C. Marzullo David C. Martin Daryl R. Kipke Department of Biomedical Engineering The University of Michigan 1101 Beal Ave. Ann Arbor MI 48109 (USA) Department of Biomedical Engineering The University of Michigan Ann Arbor MI 48109 (USA) Neuroscience Program The University of Michigan Ann Arbor MI 48109 (USA) Department of Materials Science and Engineering Macromolecular Science and Engineering and Biomedical Engineering Ann Arbor MI 48109 (USA) Present Address: Karl W. Böer Professor and Chair Materials Science and Engineering The University of Delaware 201C DuPont Hall Newark DE 19716 (USA)

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Effect of Nitrogen Concentration on Nanodiamond Film Characteristics for Electrode Application

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ECS Transactions 2009年第21期19卷

作者： Supil Raina Xuan-Anh C. LeQuan Weng P. Kang J. L. Davidson Interdisciplinary Program in Materials Science Vanderbilt University 5617 Stevenson Center Nashville Tennessee 37235 Electrical Engineering Vanderbilt University 5617 Stevenson Center Nashville TN 37232 Vanderbilt University Box 1661-B Nashville TN 37235 Vanderbilt University

Microwave plasma chemical vapor deposition was used to fabricate nanodiamond films. Nitrogen incorporation was achieved by the introduction of N2 gas along with H2 and CH4 gases in the plasma. SEM studies revealed a change in the microstructure with increase in the N2 flow rate, transitioning from a 'ridge'-like surface morphology to a more 'cauliflower'-like structure. X-ray photoelectron spectroscopy (XPS) analysis showed a general decrease in the sp3 hybridized carbon content while the sp2 hybridized carbon content increased with N2 flow rate (up to 28.7%) after which it declines. Deconvolution of the C1s XPS spectra indicates incorporation of nitrogen and existence of carbon-nitrogen bonding. Raman spectroscopy shows diamond peak at 1332 cm-1 and the graphite peak, which increases in intensity and shifts towards lower wave number with increase in the N2 flow rate. A diffuse band at 1140 cm-1 indicates presence of a nanocrystalline phase in the films.

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Effect of Nitrogen Concentration on Nanodiamond Film Characteristics for Electrode Application

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ECS Meeting Abstracts 2009年第43期MA2009-01卷

作者： Supil Raina Weng P. Kang J. L. Davidson Xuan-Anh C. LeQuan Interdisciplinary Program in Materials Science Vanderbilt University 5617 Stevenson Center Nashville Tennessee 37235 Vanderbilt University Box 1661-B Nashville TN 37235 Vanderbilt University Electrical Engineering Vanderbilt University 5617 Stevenson Center Nashville TN 37232

Abstract not Available.

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Fuel Cells: 3D Quantification of Low-Coordinate Surface Atom Density: bridging Catalytic Activity to Concave Facets of Nanocatalysts in Fuel Cells (Small 46/2016)

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Small 2016年第46期12卷

作者： Ye Xia Xiaoyan Zhong Xiaoxing Ke Gui-Rong Zhang Zhiying Cheng bo-Qing Xu National Center for Electron Microscopy in Beijing Laboratory of Advanced Materials (MOE) the State Key Laboratory of New Ceramics and Fine Processing School of Materials Science and Engineering Tsinghua University Beijing 100084 China EMAT (Electron Microscopy for Materials Science) University of Antwerp Groenenborgerlaan 171 B-2020 Antwerp Belgium Institute of Microstructure and Property of Advanced Materials Beijing University of Technology Beijing 100124 China Innovative Catalysis Program Key Lab of Organic Optoelectronics & Molecular Engineering Department of Chemistry Tsinghua University Beijing 100084 China

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Interferometric imaging, and beam-formed study of a moving Type IV Radio burst with LOFAR

arXiv

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arXiv 2022年

作者： Liu, Hongyu Zucca, Pietro Cho, Kyung-Suk Kumari, Anshu Zhang, Peijin Magdalenić, Jasmina Kim, Rok-Soon Kim, Sujin Kang, Juhyung Korea Astronomy and Space Science Institute 776 Daedeokdae-ro Yuseong-gu Daejeon34055 Korea Republic of Center for Magnetic Materials and Devices College of Physics and Electronic Engineering Qujing Normal University Qujing655011 China ASTRON The Netherlands Institute for Radio Astronomy Oude Hoogeveensedijk 4 Dwingeloo7991PD Netherlands University of Science and Technology 217 Gajeong-ro Yuseong-gu Daejeon34113 Korea Republic of Department of Physics University of Helsinki Pietari Kalmin katu 5 Helsinki00560 Finland Institute of Astronomy National Astronomical Observatory Bulgarian Academy of Sciences Sofia1784 Bulgaria Solar-Terrestrial Center of Excellence–SIDC Royal Observatory of Belgium Av. Circulaire 3 BrusselsB-1180 Belgium Center for mathematical Plasma Astrophysics Department of Mathematics KU Leuven Celestijnenlaan 200B LeuvenB-3001 Belgium Astronomy Program Department of Physics and Astronomy Seoul National University Seoul08826 Korea Republic of

Type IV radio burst has been studied for over 50 years. However, the specifics of the radio emission mechanisms is still an open question. In order to provide more information about the emission mechanisms, we studied a moving type IV radio burst with fine structures (spike group) by using the high resolution capability of Low-Frequency Array (LOFAR) on Aug 25, 2014 (SOLA-D-21-00188). We present a comparison of Nançay RadioHeliograph (NRH) and the first LOFAR imaging data of type IV radio burst. The degree of circular polarization (DCP) is calculated at frequencies in the range 20∼180 MHz using LOFAR data, and it was found that the value of DCP gradually increased during the event, with values of 10%∼20%. LOFAR interferometric data were combined with white light observations in order to track the propagation of this type IV. The kinematics shows a westward motion of the radio sources, slower than the CME leading edge. The dynamic spectrum of LOFAR shows a large number of fine structures with duration of less than 1s and high brightness temperature (Tb), i.e. 1012∼1013 K. The gradual increase of DCP supports gyrosynchrotron emission as the most plausible mechanism for the type IV. However, coherent emissions such as Electron Cyclotron Maser (ECM) instability can be responsible for small scale fine structures. Countless fine structures altogether were responsible for such high Tb © 2022, CC bY-NC-SA.

关键词： Interferometry

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Identification of Antiferromagnetic Domains Via the Optical Magnetoelectric Effect

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Physical Review Letters 2018年第5期121卷 057601-057601页

作者： Vilmos Kocsis Karlo Penc Toomas Rõõm Urmas Nagel Jakub Vít Judit Romhányi Yusuke Tokunaga Yasujiro Taguchi Yoshinori Tokura István Kézsmárki Sándor bordács RIKEN Center for Emergent Matter Science (CEMS) Wako Saitama 351-0198 Japan Department of Physics Budapest University of Technology and Economics and MTA-BME Lendület Magneto-optical Spectroscopy Research Group 1111 Budapest Hungary Institute for Solid State Physics and Optics Wigner Research Centre for Physics Hungarian Academy of Sciences H-1525 Budapest P.O.B. 49 Hungary National Institute of Chemical Physics and Biophysics 12618 Tallinn Estonia Institute of Physics ASCR Na Slovance 2 182 21 Prague 8 Czech Republic Faculty of Nuclear Science and Physical Engineering Czech Technical University Břehová 7 115 19 Prague 1 Czech Republic Okinawa Institute of Science and Technology Graduate University Onna-son Okinawa 904-0395 Japan Department of Advanced Materials Science University of Tokyo Kashiwa 277-8561 Japan Quantum-Phase Electronics Center Department of Applied Physics University of Tokyo Tokyo 113-8656 Japan Department of Applied Physics University of Tokyo Hongo Tokyo 113-8656 Japan Experimental Physics 5 Center for Electronic Correlations and Magnetism Institute of Physics University of Augsburg 86159 Augsburg Germany Hungarian Academy of Sciences Premium Postdoctor Program 1051 Budapest Hungary

The ultimate goal of multiferroic research is the development of a new-generation nonvolatile memory devices, where magnetic bits are controlled via electric fields with low energy consumption. Here, we demonstrate the optical identification of magnetoelectric (ME) antiferromagnetic (AFM) domains in the LiCoPO4 exploiting the strong absorption difference between the domains. This unusual contrast, also present in zero magnetic field, is attributed to the dynamic ME effect of the spin-wave excitations, as confirmed by our microscopic model, which also captures the characteristics of the observed static ME effect. The control and the optical readout of AFM/ME domains, demonstrated here, will likely promote the development of ME and spintronic devices based on AFM insulators.

关键词： Magnetoelectric effect Optical & microwave phenomena Multiferroics Single crystal materials Terahertz spectroscopy

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OPTIMADE, an API for exchanging materials data

arXiv

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arXiv 2021年

作者： Andersen, Casper W. Armiento, Rickard blokhin, Evgeny Conduit, Gareth J. Dwaraknath, Shyam Evans, Matthew L. Fekete, Ádám Gopakumar, Abhijith Gražulis, Saulius Merkys, Andrius Mohamed, Fawzi Oses, Corey Pizzi, Giovanni Rignanese, Gian-Marco Scheidgen, Markus Talirz, Leopold Toher, Cormac Winston, Donald Aversa, Rossella Choudhary, Kamal Colinet, Pauline Curtarolo, Stefano Di Stefano, Davide Draxl, Claudia Er, Suleyman Esters, Marco Fornari, Marco Giantomassi, Matteo Govoni, Marco Hautier, Geoffroy Hegde, Vinay Horton, Matthew K. Huck, Patrick Huhs, Georg Hummelshøj, Jens Kariryaa, Ankit Kozinsky, boris Kumbhar, Snehal Liu, Mohan Marzari, Nicola Morris, Andrew J. Mostofi, Arash A. Persson, Kristin A. Petretto, Guido Purcell, Thomas Ricci, Francesco Rose, Frisco Scheffler, Matthias Speckhard, Daniel Uhrin, Martin Vaitkus, Antanas Villars, Pierre Waroquiers, David Wolverton, Chris Wu, Michael Yang, Xiaoyu École Polytechnique Fédérale de Lausanne Lausanne1015 Switzerland Materials Design and Informatics Unit Department of Physics Chemistry and Biology Linköping University Sweden Tilde Materials Informatics Straßmannstraße 25 Berlin10249 Germany Materials Platform for Data Science Sepapaja 6 Tallinn15551 Estonia Theory of Condensed Matter Group Cavendish Laboratory 19 J.J. Thomson Avenue CambridgeCB3 0HE United Kingdom Lawrence Berkeley Labs BerkeleyCA United States Chemin des Étoiles 8 Louvain-la-Neuve1348 Belgium Department of Physics King's College London London United Kingdom Department of Materials Science and Engineering Northwestern University EvanstonIL60208 United States Institute of Biotechnology Life Science Center Vilnius University Saulétekio av. 7 VilniusLT-10257 Lithuania Institute of Computer Science Faculty of Mathematics and Informatics Vilnius University Naugarduko g. 24 VilniusLT-03225 Lithuania Fritz-Haber-Institut der Max-Planck-Gesellschaft Faradayweg 4-6 Berlin14195 Germany Center for Autonomous Materials Design Duke University DurhamNC27708 United States Department of Mechanical Engineering and Materials Science Duke University DurhamNC27708 United States Humboldt-Universität zu Berlin Institut für Physik and IRIS Adlershof Berlin12489 Germany École Polytechnique Fédérale de Lausanne Sion1951 Switzerland Trieste34136 Italy Hermann-von-Helmholtz-Platz 1 Eggenstein-Leopoldshafen76344 Germany Materials Measurement Laboratory National Institute of Standards and Technology GaithersburgMD20899 United States Ansys 300 Rustat House 62 Clifton Rd CambridgeCB1 7EG United Kingdom De Zaale 20 Eindhoven5612 AJ Netherlands Department of Physics and Science of Advanced Materials Program Central Michigan University Mount PleasantMI48859 United States Argonne National Laboratory LemontIL60439 United States Thayer School of Engineering Dartmouth College HanoverNH03755 United States Los AltosCA940

The Open Databases Integration for materials Design (OPTIMADE) consortium has designed a universal application programming interface (API) to make materials databases accessible and interoperable. We outline the first stable release of the specification, v1.0, which is already supported by many leading databases and several software packages. We illustrate the advantages of the OPTIMADE API through worked examples on each of the public materials databases that support the full API specification. © 2021, CC bY.

关键词： Specifications

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Correction to: SARS-CoV-2 removal with a polyurethane foam composite

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Environmental science and pollution research international 2023年第8期30卷 22033页

作者： Guilherme Pereira Schoeler Thays França Afonso Carolina Faccio Demarco Victor Dos Santos barboza Tito Roberto Sant'anna Cadaval Andrei Valerão Igansi Marcos Alexandre Gelesky Janice Luehring Giongo Rodrigo de Almeida Vaucher Rafael de Avila Delucis Robson Andreazza Postgraduate Program in Environmental Sciences Center for Engineering Federal University of Pelotas R. Benjamin Constant 989 Pelotas RS CEP 96010-020 Brazil. Postgraduate Program in Materials Science and Engineering Federal University of Pelotas R. Gomes Carneiro 01 Pelotas RS CEP 96010-610 Brazil. Graduate Program in Biochemistry and Bioprospecting Research Laboratory in Biochemical and Molecular Biology of Microorganisms (LaPeBBiOM) Federal University of Pelotas RS Av. Eliseu Maciel Campus Universitário s/n Capão Do Leão CEP 96160-000 Brazil. School of Chemistry and Food Federal University of Rio Grande Av. Itália Km 8 s/n Rio Grande RS CEP 96203-000 Brazil. Postgraduate Program in Environmental Sciences Center for Engineering Federal University of Pelotas R. Benjamin Constant 989 Pelotas RS CEP 96010-020 Brazil. robsonandreazza@yahoo.com.br. Postgraduate Program in Materials Science and Engineering Federal University of Pelotas R. Gomes Carneiro 01 Pelotas RS CEP 96010-610 Brazil. robsonandreazza@yahoo.com.br.

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