Download or read book Ion Beam Modification of Topological Insulator Bismuth Selenide written by and published by . This book was released on 2014 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt: In this study, we demonstrate chemical doping of a topological insulator Bi2Se3 using ion implantation. Ion beam-induced structural damage was characterized using grazing incidence X-ray diffraction and transmission electron microscopy. Ion damage was reversed using a simple thermal annealing step. Carrier-type conversion was achieved using ion implantation followed by an activation anneal in Bi2Se3 thin films. These two sets of experiments establish the feasibility of ion implantation for chemical modification of Bi2Se3, a prototypical topological insulator. Ion implantation can, in principle, be used for any topological insulator. The direct implantation of dopants should allow better control over carrier concentrations for the purposes of achieving low bulk conductivity. Ion implantation also enables the fabrication of inhomogeneously doped structures, which in turn should make possible new types of device designs.
Download or read book Optical and electrical properties of topological insulator Bi2Se3 written by Jiajun Zhu and published by diplom.de. This book was released on 2017-07-12 with total page 88 pages. Available in PDF, EPUB and Kindle. Book excerpt: Topological insulator is one of the hottest research topics in solid state physics. This is the first book to describe the vibrational spectroscopies and electrical transport of topological insulator Bi2Se3, one of the most exciting areas of research in condensed matter physics. In particular, attempts have been made to summarize and develop the various theories and new experimental techniques developed over years from the studies of Raman scattering, infrared spectroscopy and electrical transport of topological insulator Bi2Se3. It is intended for material and physics researchers and graduate students doing research in the field of optical and electrical properties of topological insulators, providing them the physical understanding and mathematical tools needed to engage research in this quickly growing field. Some key topics in the emerging field of topological insulators are introduced.
Download or read book Ion Beam Modification of Insulators written by Paolo Mazzoldi and published by Elsevier Publishing Company. This book was released on 1987 with total page 778 pages. Available in PDF, EPUB and Kindle. Book excerpt: This volume provides a current treatise on the chemical and physical property modifications induced by ion beams in insulators, including applications in astrophysics, geophysics, material technology, optoelectronics, memory devices and polymers. An extensive review is given of experimental methods for the analysis of ion bombarded insulators, including optical and structural methods, resonance, energetic ion methods and surface techniques. An appendix of more than 90 pages presents the most extensive ion-range tables for insulators so far. These tables cover a wide regime of energies and a wide variety of insulating targets, including glasses and many organic and ceramics materials. The book will be of particular value to research physicists, chemists, astrophysicists and geophysicists as well as engineers interested in optoelectronics, polymers, nuclear energy and material technology.
Download or read book Ion Beam Modification of Materials written by International Conference on Ion Beam Modification of Materials and published by . This book was released on 1985 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Tuning the Electron phonon Interaction in Bismuth Selenide Bi2Se3 Topological Insulator Nanostructures written by Christian Ikechukwu Nweze and published by . This book was released on 2022 with total page 0 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Ion Beam Modification of Metals written by Fadeĭ Fadeevich Komarov and published by Routledge. This book was released on 1992 with total page 272 pages. Available in PDF, EPUB and Kindle. Book excerpt: Translated from the 1990 Russian work published by Metallurgiya (Moscow). Komarov draws largely on his own research (and 590 references) to address the problems associated with directional ion beam modification of the physicochemical properties of the near- surface regions of metal and alloys. He examines the primary processes accompanying the passage of fast ions in crystals and secondary processes such as annealing and ageing; and he shows the possibilities for using ion beam alloying for controlling the mechanical, tribological, corrosion, and catholytic properties of metals and alloys. Annotation copyrighted by Book News, Inc., Portland, OR
Download or read book Topological Insulator and Magnetically Doped Topological Insulator Thin Films by Molecular Beam Epitaxy written by Shuang Li and published by . This book was released on 2013 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt: Searching for energy dissipation-less systems has become increasingly important for low power electronic devices. Topological insulators, a new topological state of quantum matter, have recently been proposed as an emerging material for use in low power electronics, because of the unique transport along its topologically protected edge/surface states. In addition, it has been predicted that the incorporation of magnetic elements into topological insulators could lead to the quantum anomalous Hall state, which is a truly dissipation-less system. However, the material quality of topological insulator thin films remains as a major stumbling block for exploring the novel physics of topological insulators and their proposed applications. In the first part of this thesis, I will first describe an advanced thin film deposition technique, molecular beam epitaxy (MBE) and the mini-MBE system we designed and built for topological insulator thin film growth. Then I will briefly illustrate some basic principles and sample preparation methods for a variety of characterization techniques we used for the material property investigation. In the second part of this thesis, I will present the growth and characterization of topological insulator bismuth telluride thin films grown by a two-step MBE process developed as part of this research. By optimizing the growth recipe and particularly developing the two-step growth method, defect densities were significantly reduced and higher crystal and surface quality bismuth telluride thin films were achieved. The existence of a topological surface state on our bismuth telluride thin films was also confirmed. The Fermi level of our bismuth telluride thin film was tuned to very close to the bulk gap region. The successful growth of centimeter-sized, uniform, high quality topological insulator thin films provides an excellent platform for both fundamental studies of the properties of topological insulators and fabrications of mesoscopic devices. Finally, I will report on the first successful growth of gadolinium substituted bismuth telluride thin films with high Gd concentrations by MBE. We systematically investigated the crystal structure, band structure, magnetic, and electronic properties of gadolinium substituted bismuth telluride thin films. The topological surface state was found to remain intact by Gd substitution into bismuth telluride. Although ferromagnetic behavior in gadolinium substituted bismuth telluride thin films was not observed above 2K by both magnetic and magneto-transport measurements, gadolinium substituted bismuth telluride thin films were found to have a Curie susceptibility due to the paramagnetic Gd ions with an atomic magnetic moment of 6.93 Bohr magneton per Gd ion, which suggests that it is possible to realize dissipation-less transport with a small external magnetic field or with a ferromagnetic layer on top of gadolinium substituted bismuth telluride thin films.
Download or read book Atomic and Electronic Structures of Bismuth Selenide Surfaces Investigated by Low Energy Ion Scattering written by Weimin Zhou and published by . This book was released on 2017 with total page 177 pages. Available in PDF, EPUB and Kindle. Book excerpt: Topological insulator (TI) materials do not conduct electricity in the bulk, but instead conduct along the surface via topological surface states (TSS). To fully utilize these materials, it is critically important to understand their surface atomic and electronic structures, both of which can be sensitively probed by low energy ion scattering (LEIS).
Download or read book Proceedings of the Third International Conference on Ion Beam Modification of Materials Grenoble written by International Conference on Ion Beam Modification of Materials and published by . This book was released on 1983 with total page 565 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Ion Beam Modification of Materials written by and published by . This book was released on 1981 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Applications of Laser Ablation written by Dongfang Yang and published by BoD – Books on Demand. This book was released on 2016-12-21 with total page 430 pages. Available in PDF, EPUB and Kindle. Book excerpt: Laser ablation refers to the phenomenon in which a low wavelength and short pulse (ns-fs) duration of laser beam irradiates the surface of a target to induce instant local vaporization of the target material generating a plasma plume consisting of photons, electrons, ions, atoms, molecules, clusters, and liquid or solid particles. This book covers various aspects of using laser ablation phenomenon for material processing including laser ablation applied for the deposition of thin films, for the synthesis of nanomaterials, and for the chemical compositional analysis and surface modification of materials. Through the 18 chapters written by experts from international scientific community, the reader will have access to the most recent research and development findings on laser ablation through original research studies and literature reviews.
Download or read book Handbook of Nanomaterials for Sensing Applications written by Suresh Kumar Kailasa and published by Elsevier. This book was released on 2021-04-01 with total page 664 pages. Available in PDF, EPUB and Kindle. Book excerpt: Handbook of Nanomaterials for Intelligent Sensing Applications provides insights into the production of nanosensors and their applications. The book takes an interdisciplinary approach, showing how nano-enhanced sensing technology is being used in a variety of industry sectors and addressing related challenges surrounding the production, fabrication and application of nanomaterials-based sensors at both experimental and theoretical levels. This book is an important reference source for materials scientists and engineers who want to learn more about how nanomaterials are being used to enhance sensing products and devices for a variety of industry sectors. The pof miniaturized device components and engineering systems of micro- and nanoscale is beyond the capability of conventional machine tools. The production of intelligent sensors at nanometer scale presents great challenges to engineers in design and manufacture. The manufacturing of nano-scaled devices and components involves isolation, transportation and re-assembly of atoms and molecules. This nanomachining technology involves not only physical-chemical processes as in the case of microfabrication, but it also involves application and integration of the principles of molecular biology. - Explains how the functionalization of nanomaterials is being used to create more effective sensors - Explores the major challenges of using nanoscale sensors for industrial applications on a broad scale - Assesses which classes of nanomaterial should best be used for sensing applications
Download or read book Topological Insulators written by Shun-Qing Shen and published by Springer Science & Business Media. This book was released on 2013-01-11 with total page 234 pages. Available in PDF, EPUB and Kindle. Book excerpt: Topological insulators are insulating in the bulk, but process metallic states present around its boundary owing to the topological origin of the band structure. The metallic edge or surface states are immune to weak disorder or impurities, and robust against the deformation of the system geometry. This book, the first of its kind on topological insulators, presents a unified description of topological insulators from one to three dimensions based on the modified Dirac equation. A series of solutions of the bound states near the boundary are derived, and the existing conditions of these solutions are described. Topological invariants and their applications to a variety of systems from one-dimensional polyacetalene, to two-dimensional quantum spin Hall effect and p-wave superconductors, and three-dimensional topological insulators and superconductors or superfluids are introduced, helping readers to better understand this fascinating new field. This book is intended for researchers and graduate students working in the field of topological insulators and related areas. Shun-Qing Shen is a Professor at the Department of Physics, the University of Hong Kong, China.
Download or read book Spin Current written by Sadamichi Maekawa and published by Oxford University Press. This book was released on 2017 with total page 541 pages. Available in PDF, EPUB and Kindle. Book excerpt: In a new branch of physics and technology, called spin-electronics or spintronics, the flow of electrical charge (usual current) as well as the flow of electron spin, the so-called "spin current", are manipulated and controlled together. This book is intended to provide an introduction and guide to the new physics and applications of spin current.
Download or read book Outlook and Challenges of Nano Devices Sensors and MEMS written by Ting Li and published by Springer. This book was released on 2017-03-01 with total page 0 pages. Available in PDF, EPUB and Kindle. Book excerpt: This book provides readers with an overview of the design, fabrication, simulation, and reliability of nanoscale semiconductor devices, MEMS, and sensors, as they serve for realizing the next-generation internet of things. The authors focus on how the nanoscale structures interact with the electrical and/or optical performance, how to find optimal solutions to achieve the best outcome, how these apparatus can be designed via models and simulations, how to improve reliability, and what are the possible challenges and roadblocks moving forward.
Download or read book Magnetic Nanostructured Materials written by Ahmed A. El Gendy and published by Elsevier. This book was released on 2018-06-29 with total page 394 pages. Available in PDF, EPUB and Kindle. Book excerpt: Magnetic Nanostructured Materials: From Lab to Fab presents a complete overview of the translation of nanostructured materials into realistic applications, drawing on the most recent research in the field to discuss the fundamentals, synthesis and characterization of nanomagnetics. A wide spectrum of nanomagnetic applications is included, covering industrial, environmental and biomedical fields, and using chemical, physical and biological methods. Materials such as Fe, Co, CoxC, MnGa, GdSi, ferrite nanoparticles and thin films are highlighted, with their potential applications discussed, such as magnetic refrigeration, energy harvesting, magnetic sensors, hyperthermia, MRI, drug delivery, permanent magnets, and data storage devices. Offering interdisciplinary knowledge on the materials science of nanostructured materials and magnetics, this book will be of interest to researchers in materials science, engineering, physics and chemistry with interest in magnetic nanomaterials, as well as postgraduate students and professionals in industry and government. - Provides interdisciplinary knowledge on the materials science of nanostructured materials and magnetics - Aids in the understanding of complex fundamentals and synthesis methods for magnetic nanomaterials - Includes examples of real applications - Shows how laboratory work on magnetic nanoparticles connects to industrial implementation and applications
Download or read book Introduction to Thermoelectricity written by H. Julian Goldsmid and published by Springer Science & Business Media. This book was released on 2009-10-03 with total page 250 pages. Available in PDF, EPUB and Kindle. Book excerpt: Introduction to Thermoelectricity is the latest work by Professor Julian Goldsmid drawing on his 55 years experience in the field. The theory of the thermoelectric and related phenomena is presented in sufficient detail to enable researchers to understand their observations and develop improved thermoelectric materials. The methods for the selection of materials and their improvement are discussed. Thermoelectric materials for use in refrigeration and electrical generation are reviewed. Experimental techniques for the measurement of properties and for the production of thermoelements are described. Special emphasis is placed on nanotechnology which promises to yield great improvements in the efficiency of thermoelectric devices. Chapters are also devoted to transverse thermoelectric effects and thermionic energy conversion, both techniques offering the promise of important applications in the future.
