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High Quality Van Der Waals Heterostructures For Optoelectronics And Spintronics
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Book Synopsis High Quality Van Der Waals Heterostructures for Optoelectronics and Spintronics by : Emmanuel Courtade
Download or read book High Quality Van Der Waals Heterostructures for Optoelectronics and Spintronics written by Emmanuel Courtade and published by . This book was released on 2019 with total page 0 pages. Available in PDF, EPUB and Kindle. Book excerpt: Atomically thin materials such as monolayers of graphite, called graphene, can be isolated with simple experimental methods. Since 2010 the research in atomically thin transition metal dichalcogenides (TMDs) such as MoS2 and WSe2 is one of the most active areas of condensed matter and materials physics research. This has several reasons : bulk TMD crystals have been studied since decades and are in the 2H phase semiconductors with an indirect bandgap. The gap remains indirect also for thinner crystals up to the bilayer limit, but when going from bilayer to monolayer the bandgap becomes direct and makes TMD monolayers interesting for applications in optoelectronics and for fundamental research in light-matter interaction.In addition to being direct, optical transitions at the K-points of the brillouin zone are governed by chiral optical selection rules. By using polarized light of right or left handedness optical transitions in the K+ or K- valley, respectively, can be addressed. The K+ and K- valleys are related by time reversal symmetry. This allows manipulating optically the valley index and allows interesting studies in the field of valleytronics. Here the target is to measure and understand valley polarization initialization and memory for potential applications. The valence and conduction bands at the K-points are spin split by the spin-orbit interaction, so in optical spectroscopy the valley and spin states are manipulated. Optical transitions are governed by electron-hole pairs, excitons, bound by Coulomb attraction leading to binding energies in the hundreds of meV range.At the beginning of this thesis many of these interesting properties were inaccessible. Details of optical transitions and their polarization properties were masked by the low sample quality. In this thesis we report on the considerable improvement in sample quality. We detail the sample fabrication procedures developed at the LPCNO based on exfoliation and dry stamping. Our samples show spectrally narrow transitions approaching the homogeneous limit. This allows detailed studies of excitonic properties in applied magnetic fields and in charge-tunable structures using photoluminescence and differential reflection spectroscopy. We access important information such as the exciton binding energies and the fine-structure splitting of charged excitons and we outline open questions and future challenges in this research field.
Book Synopsis Optics and Optoelectronics of Atomically Thin Magnets and Semiconductors by : Genevieve Clark
Download or read book Optics and Optoelectronics of Atomically Thin Magnets and Semiconductors written by Genevieve Clark and published by . This book was released on 2018 with total page 104 pages. Available in PDF, EPUB and Kindle. Book excerpt: Since the discovery of graphene, layered van der Waals materials have become one of the most active subjects of study. The array of available atomically thin materials has expanded rapidly beyond graphene, encompassing a wide variety of physical properties ranging from insulators like hexagonal boron-nitride, to semiconductors such as MoS2 and superconductors (ie NbSe2) to name a few. These materials are of significant fundamental interest, since they offer the first opportunity to study physical phenomena in a truly two-dimensional system, while showing layer-dependent emergent properties unavailable in any other class of materials. They also offer a potential answer to the increasing demand for nanostructured materials, as current electronic and magnetic devices approach the nanoscale, and devices based on quantum mechanical phenomena rise to the forefront of emerging technology. Here, I employ optical and optoelectronic characterization to study two different types of 2D materials - few-layer flakes of the layered magnetic insulator CrI3, and monolayer flakes of semiconducting WSe2. The first three chapters of this thesis focus on the isolation, characterization, and control of magnetism in mono- and few-layer flakes of CrI3. Bulk crystals of CrI3 are known to be ferromagnetic insulators with large predicted magnetocrystalline anisotropy, essential in order to stabilize low dimensional magnetic order against thermal fluctuations. Optical characterization of monolayer CrI3 reveals robust ferromagnetic behavior, while bilayer and trilayer flakes show layered antiferromagnetic behavior, with strong intra-layer ferromagnetism and antiferromagnetic inter-layer coupling. Van der Waals heterostructure devices based on bilayer CrI3 flakes allow gate-dependent control of magnetic behavior in bilayer CrI3 flakes. This work demonstrates both the first truly two-dimensional magnetic material and electrostatic control of magnetic phase in bilayer CrI3. In chapter four, I discuss the optical properties of both intrinsic and defect-bound excitons in monolayers of WSe2 scalably grown using chemical vapor deposition (CVD). While the majority of optical studies utilize exfoliated flakes of WSe2, this time-consuming and non-scalable process will limit future studies of this material. I discuss a scalable, direct method of monolayer growth that yields flakes with high optical quality, assessed using low-temperature optical characterization of the intrinsic excitons in this material. I then discuss the discovery of a new type of single photon emitter found in the monolayer flakes, thought to arise from single intrinsic excitons localized to defects within the layers. Finally, these two materials are combined to form spintronic devices based on van der Waals heterostructures of bilayer CrI3 and monolayer WSe2 described in chapter 5.
Book Synopsis 2D Materials and Van der Waals Heterostructures by : Antonio Di Bartolomeo
Download or read book 2D Materials and Van der Waals Heterostructures written by Antonio Di Bartolomeo and published by MDPI. This book was released on 2020-06-23 with total page 170 pages. Available in PDF, EPUB and Kindle. Book excerpt: The advent of graphene and, more recently, two-dimensional materials has opened new perspectives in electronics, optoelectronics, energy harvesting, and sensing applications. This book, based on a Special Issue published in Nanomaterials – MDPI covers experimental, simulation, and theoretical research on 2D materials and their van der Waals heterojunctions. The emphasis is the physical properties and the applications of 2D materials in state-of-the-art sensors and electronic or optoelectronic devices.
Book Synopsis Tunnel Field Effect Transistors Based on Two-Dimensional Material Van-der-Waals Heterostructures by : Jiang Cao
Download or read book Tunnel Field Effect Transistors Based on Two-Dimensional Material Van-der-Waals Heterostructures written by Jiang Cao and published by . This book was released on 2022 with total page 0 pages. Available in PDF, EPUB and Kindle. Book excerpt: The successful isolation of graphene in 2004 has attracted great interest to search for potential applications of this unique material and other newborn members of the two-dimensional (2-D) family in electronics, optoelectronics, spintronics and other fields. Compared to graphene, the 2-D transition metal dichalcogenides (TMDs) have the advantage of being semiconductors, which would allow their use for logic devices. In the past decade, significant developments have been made in this area, where opportunities and challenges co-exist. Stacking different 2-D materials significantly increases the already considerable design space, especially when a type-II band alignment is obtained. This chapter will describe the recent progresses in the tunnel field-effect transistors based on 2-D TMD van-der-Waals heterostructure, which is one of the promising candidates for increasingly important low-power mobile computation applications. Due to their small size, such devices are intrinsically dominated by quantum effects. This requires the adoption of a fairly general theory of transport, such as the nonequilibrium Green\´s functions (NEGF) formalism, which is a method having been more-and-more used for the simulation of electron transport in nanostructures in recent years.
Book Synopsis Optoelectronics and Spintronics in Smart Thin Films by : James Ayodele Oke
Download or read book Optoelectronics and Spintronics in Smart Thin Films written by James Ayodele Oke and published by CRC Press. This book was released on 2023-12-06 with total page 269 pages. Available in PDF, EPUB and Kindle. Book excerpt: Smart thin films, composed of functional materials deposited in thin layers, have opened new avenues for the development of flexible, lightweight, and high-performance devices. Optoelectronics and Spintronics in Smart Thin Films presents a comprehensive overview of this emerging area and details the current and near future integration of smart thin films in solar cells, and memory storage. Offers an overview of optoelectronics and spintronics. Discusses synthesis of smart nanomaterials. Describes deposition techniques and characterization of thin films. Considers the integration and application of opto-spintronics for technological advancement of solar cells and memory storage devices. Focused on advancing research on this evolving subject, this book is aimed at advanced students, researchers, and engineers in materials, chemical, mechanical, and electrical engineering, as well as applied physics.
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.
Book Synopsis Van der Waals Heterostructures by : Zhuo Kang
Download or read book Van der Waals Heterostructures written by Zhuo Kang and published by John Wiley & Sons. This book was released on 2022-12-02 with total page 340 pages. Available in PDF, EPUB and Kindle. Book excerpt: Van der Waals Heterostructures A comprehensive resource systematically detailing the developments and applications of van der Waals heterostructures and devices Van der Waals Heterostructures is essential reading to understand the developments made in van der Waals heterostructures and devices in all aspects, from basic synthesis to physical analysis and heterostructures assembling to devices applications, including demonstrated applications of van der Waals heterostructure on electronics, optoelectronics, and energy conversion, such as solar energy, hydrogen energy, batteries, catalysts, biotechnology, and more. This book starts from an in-depth introduction of van der Waals interactions in layered materials and the forming of mixed-dimensional heterostructures via van der Waals force. It then comprehensively summarizes the synthetic methods, devices building processes and physical mechanism of 2D van der Waals heterostructures, and devices including 2D-2D electronics, 2D-2D optoelectronics, and mixed dimensional van der Waals heterostructures. In Van der Waals Heterostructures, readers can expect to find specific information on: The current library of 2D semiconductors and the current synthesis and performances of 2D semiconductors Controllable synthesis and assemble van der Waals heterostructures, physics of the van der Waals interface, and multi-field coupling effects 2D-2D electronics, 2D-2D optoelectronics, mixed dimensional van der Waals heterostructures, and van der Waals heterostructure applications on energy conversion Insight into future perspectives of the van der Waals heterostructures and devices with the detailed effective role of 2D materials for integrated electrical and electronic equipment
Book Synopsis Integration of 2D Materials for Electronics Applications by : Filippo Giannazzo
Download or read book Integration of 2D Materials for Electronics Applications written by Filippo Giannazzo and published by MDPI. This book was released on 2019-02-13 with total page 265 pages. Available in PDF, EPUB and Kindle. Book excerpt: This book is a printed edition of the Special Issue "Integration of 2D Materials for Electronics Applications" that was published in Crystals
Download or read book 2D Materials written by Phaedon Avouris and published by Cambridge University Press. This book was released on 2017-06-29 with total page 521 pages. Available in PDF, EPUB and Kindle. Book excerpt: Learn about the most recent advances in 2D materials with this comprehensive and accessible text. Providing all the necessary materials science and physics background, leading experts discuss the fundamental properties of a wide range of 2D materials, and their potential applications in electronic, optoelectronic and photonic devices. Several important classes of materials are covered, from more established ones such as graphene, hexagonal boron nitride, and transition metal dichalcogenides, to new and emerging materials such as black phosphorus, silicene, and germanene. Readers will gain an in-depth understanding of the electronic structure and optical, thermal, mechanical, vibrational, spin and plasmonic properties of each material, as well as the different techniques that can be used for their synthesis. Presenting a unified perspective on 2D materials, this is an excellent resource for graduate students, researchers and practitioners working in nanotechnology, nanoelectronics, nanophotonics, condensed matter physics, and chemistry.
Download or read book Non-layered 2D Materials written by and published by Elsevier. This book was released on 2023-11-20 with total page 370 pages. Available in PDF, EPUB and Kindle. Book excerpt: Semiconductors and Semimetals series, highlights new advances in the field, with this new volume presenting interesting chapters. Each chapter is written by an international board of authors. The existence of this book is a testament to the dedication and expertise of our esteemed authors and contributors from across the globe, all of whom are at the forefront of this rapidly evolving field Serves as your gateway to a comprehensive exploration of non-layered 2D materials Not only teaches you something new but also sparks your creativity and curiosity
Book Synopsis 2D Monoelemental Materials (Xenes) and Related Technologies by : Zongyu Huang
Download or read book 2D Monoelemental Materials (Xenes) and Related Technologies written by Zongyu Huang and published by CRC Press. This book was released on 2022-04-19 with total page 166 pages. Available in PDF, EPUB and Kindle. Book excerpt: Monoelemental 2D materials called Xenes have a graphene-like structure, intra-layer covalent bond, and weak van der Waals forces between layers. Materials composed of different groups of elements have different structures and rich properties, making Xenes materials a potential candidate for the next generation of 2D materials. 2D Monoelemental Materials (Xenes) and Related Technologies: Beyond Graphene describes the structure, properties, and applications of Xenes by classification and section. The first section covers the structure and classification of single-element 2D materials, according to the different main groups of monoelemental materials of different components and includes the properties and applications with detailed description. The second section discusses the structure, properties, and applications of advanced 2D Xenes materials, which are composed of heterogeneous structures, produced by defects, and regulated by the field. Features include: Systematically detailed single element materials according to the main groups of the constituent elements Classification of the most effective and widely studied 2D Xenes materials Expounding upon changes in properties and improvements in applications by different regulation mechanisms Discussion of the significance of 2D single-element materials where structural characteristics are closely combined with different preparation methods and the relevant theoretical properties complement each other with practical applications Aimed at researchers and advanced students in materials science and engineering, this book offers a broad view of current knowledge in the emerging and promising field of 2D monoelemental materials.
Download or read book Final Progress Report written by and published by . This book was released on 2016 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt: The research in this program involves theoretical investigations of electronic, optical and mechanical properties of graphene and its derivatives, such as bi-layer graphene, graphene-based van der Waals heterostructures, strained graphene, as well as graphene on various surfaces. One line of research has been development of theoretical models that support graphene's large array of possible technological applications. For example one of our goals has been the understanding of surface plasmons and spin relaxation mechanisms in graphene, related to novel optoelectronics and spintronics applications. Our current research focus is on understanding the role of correlations in graphene under mechanical deformations, such as strain. The main goal is to describe the mutual interplay between strain and electron-electron interactions which could lead to the formation of novel elec- tronic phases with strongly modified electronic, magnetic and optical properties. This direction of research contributes to deeper understanding of interactions in graphene and related atomically-thin materials - a subject at the forefront of research on graphene and its derivatives.
Book Synopsis Molecular Beam Epitaxy by : Hajime Asahi
Download or read book Molecular Beam Epitaxy written by Hajime Asahi and published by John Wiley & Sons. This book was released on 2019-04-15 with total page 510 pages. Available in PDF, EPUB and Kindle. Book excerpt: Covers both the fundamentals and the state-of-the-art technology used for MBE Written by expert researchers working on the frontlines of the field, this book covers fundamentals of Molecular Beam Epitaxy (MBE) technology and science, as well as state-of-the-art MBE technology for electronic and optoelectronic device applications. MBE applications to magnetic semiconductor materials are also included for future magnetic and spintronic device applications. Molecular Beam Epitaxy: Materials and Applications for Electronics and Optoelectronics is presented in five parts: Fundamentals of MBE; MBE technology for electronic devices application; MBE for optoelectronic devices; Magnetic semiconductors and spintronics devices; and Challenge of MBE to new materials and new researches. The book offers chapters covering the history of MBE; principles of MBE and fundamental mechanism of MBE growth; migration enhanced epitaxy and its application; quantum dot formation and selective area growth by MBE; MBE of III-nitride semiconductors for electronic devices; MBE for Tunnel-FETs; applications of III-V semiconductor quantum dots in optoelectronic devices; MBE of III-V and III-nitride heterostructures for optoelectronic devices with emission wavelengths from THz to ultraviolet; MBE of III-V semiconductors for mid-infrared photodetectors and solar cells; dilute magnetic semiconductor materials and ferromagnet/semiconductor heterostructures and their application to spintronic devices; applications of bismuth-containing III–V semiconductors in devices; MBE growth and device applications of Ga2O3; Heterovalent semiconductor structures and their device applications; and more. Includes chapters on the fundamentals of MBE Covers new challenging researches in MBE and new technologies Edited by two pioneers in the field of MBE with contributions from well-known MBE authors including three Al Cho MBE Award winners Part of the Materials for Electronic and Optoelectronic Applications series Molecular Beam Epitaxy: Materials and Applications for Electronics and Optoelectronics will appeal to graduate students, researchers in academia and industry, and others interested in the area of epitaxial growth.
Book Synopsis Materials for Optoelectronics by : Maurice Quillec
Download or read book Materials for Optoelectronics written by Maurice Quillec and published by Springer Science & Business Media. This book was released on 1996-01-31 with total page 404 pages. Available in PDF, EPUB and Kindle. Book excerpt: Optoelectronics ranks one of the highest increasing rates among the different industrial branches. This activity is closely related to devices which are themselves extremely dependent on materials. Indeed, the history of optoelectronic devices has been following closely that of the materials. KLUWER Academic Publishers has thus rightly identified "Materials for Optoelectronics" as a good opportunity for a book in the series entitled "Electronic Materials; Science and Technology". Although a sound background in solid state physics is recommended, the authors have confined their contribution to a graduate student level, and tried to define any concept they use, to render the book as a whole as self-consistent as possible. In the first section the basic aspects are developed. Here, three chapters consider semiconductor materials for optoelectronics under various aspects. Prof. G. E. Stillman begins with an introduction to the field from the point of view of the optoelectronic market. Then he describes how III-V materials, especially the Multi Quantum Structures meet the requirements of optoelectronic functions, including the support of microelectronics for optoelectronic integrated circuits. In chapter 2, Prof.
Book Synopsis Magnetic Properties of Layered Transition Metal Compounds by : L.J. de Jongh
Download or read book Magnetic Properties of Layered Transition Metal Compounds written by L.J. de Jongh and published by Springer Science & Business Media. This book was released on 2012-12-06 with total page 430 pages. Available in PDF, EPUB and Kindle. Book excerpt: In the last two decades low-dimensional (low-d) physics has matured into a major branch of science. Quite generally we may define a system with restricted dimensionality d as an object that is infinite only in one or two spatial directions (d = 1 and 2). Such a definition comprises isolated single chains or layers, but also fibres and thin layers (films) of varying but finite thickness. Clearly, a multitude of physical phenomena, notably in solid state physics, fall into these categories. As examples, we may mention: • Magnetic chains or layers (thin-film technology). • Metallic films (homogeneous or heterogeneous, crystalline, amorphous or microcristalline, etc.). • I-d or 2-d conductors and superconductors. • Intercalated systems. • 2-d electron gases (electrons on helium, semiconductor interfaces). • Surface layer problems (2-d melting of monolayers of noble gases on a substrate, surface problems in general). • Superfluid films of ~He or 'He. • Polymer physics. • Organic and inorganic chain conductors, superionic conductors. • I-d or 2-d molecular crystals and liquid crystals. • I-d or 2-d ferro- and antiferro electrics.
Book Synopsis Graphene: A Versatile Advanced Material by : Mohamad Nasir Mohamad Ibrahim
Download or read book Graphene: A Versatile Advanced Material written by Mohamad Nasir Mohamad Ibrahim and published by Penerbit USM. This book was released on 2024-06-07 with total page 178 pages. Available in PDF, EPUB and Kindle. Book excerpt: Most of us have been exposed to graphene through the use of pencils since elementary school. After all, pencil leads are made out of graphite, which are graphene layers that are piled on top of each other. Graphene is an excellent material and has stimulated much research interest due to its unique structure and interesting properties. There are several unique and powerful properties exhibited by graphene that makes it suitable for various advanced applications. For example, it is the thinnest material, with a thickness of only one atomic layer. It is also very strong, flexible, has high thermal and electrical conductivity and much more. In addition, it also has special electrical conductor and insulator properties with tunable optical properties. This book covers fundamental and advanced topics related to graphene, including the introduction and history, structure and chemistry, basic properties, and the preparation methods of graphene. Furthermore, graphene nanocomposites, different characterization techniques, as well as the basic and advanced graphene applications are presented within this book in order to provide a broad reference for researchers, scientists, as well as postgraduate and undergraduate students. Additionally, this book contains a special topic related to bio-based graphene which is currently gaining a lot of attention.
Book Synopsis Two-Dimensional Nanostructures by : Mahmood Aliofkhazraei
Download or read book Two-Dimensional Nanostructures written by Mahmood Aliofkhazraei and published by CRC Press. This book was released on 2012-05-02 with total page 325 pages. Available in PDF, EPUB and Kindle. Book excerpt: After the 2010 Nobel Prize in Physics was awarded to Andre Geim and Konstantin Novoselov "for groundbreaking experiments regarding the two-dimensional material graphene," even more research and development efforts have been focused on two-dimensional nanostructures. Illustrating the importance of this area in future applications, Two-Dimensional Nanostructures covers the fabrication methods and properties of these materials. The authors begin with discussions on the properties, size effect, applications, classification groups, and growth of nanostructures. They then describe various characterization and fabrication methods, such as spectrometry, low-energy electron diffraction, physical and chemical vapor deposition, and molecular beam epitaxy. The remainder of the text focuses on mechanical, chemical, and physical properties and fabrication methods, including a new mechanical method for fabricating graphene layers and a model for relating the features and structures of nanostructured thin films. With companies already demonstrating the capabilities of graphene in a flexible touch-screen and a 150 GHz transistor, nanostructures are on their way to replacing silicon as the materials of choice in electronics and other areas. This book aids you in understanding the current chemical, mechanical, and physical processes for producing these "miracle materials."
