Download or read book Electronic Transport in Functional Materials and Two Dimensional Hole System written by Shuhao Liu and published by . This book was released on 2018 with total page 120 pages. Available in PDF, EPUB and Kindle. Book excerpt: Understanding the transport properties of semiconductor materials has been a key to the discovery of various intriguing quantum phenomena in condensed matter physics and the development of new semiconductor technologies. In this dissertation, electronic transport properties of the 2D hole system at the GaAs/AlGaAs heterointerface, the exceptional thermoelectric material SnSe and the emerging solar cell material lead halide perovskite are investigated.

Download or read book Functional Materials and Electronics written by Jiabao Yi and published by CRC Press. This book was released on 2018-05-11 with total page 334 pages. Available in PDF, EPUB and Kindle. Book excerpt: This informative book focuses on newly developed functional materials and their applications for electronic and spintronic devices. Electronic devices have become a part of our daily modern life, involving mobile phones, data storage, computers, and satellites, and there is relentless growth in microelectronics. This volume covers the topics of oxide materials for electronics devices, new materials, and new properties, especially in newly developed research areas, such as oxide magnetic semiconductors and two-dimensional electron gas. Key features: Emphasizes functional materials for electronic devices, including two-dimensional materials, two-dimensional electron gas, multiferroic materials, memory materials, sensor materials, and spintronic materials. Describes the basics as well as new developments of these functional materials and devices.

Download or read book Electronic Transport in Mesoscopic Systems written by Supriyo Datta and published by Cambridge University Press. This book was released on 1997-05-15 with total page 398 pages. Available in PDF, EPUB and Kindle. Book excerpt: Advances in semiconductor technology have made possible the fabrication of structures whose dimensions are much smaller than the mean free path of an electron. This book gives a thorough account of the theory of electronic transport in such mesoscopic systems. After an initial chapter covering fundamental concepts, the transmission function formalism is presented, and used to describe three key topics in mesoscopic physics: the quantum Hall effect; localisation; and double-barrier tunnelling. Other sections include a discussion of optical analogies to mesoscopic phenomena, and the book concludes with a description of the non-equilibrium Green's function formalism and its relation to the transmission formalism. Complete with problems and solutions, the book will be of great interest to graduate students of mesoscopic physics and nanoelectronic device engineering, as well as to established researchers in these fields.

Download or read book Emerging 2D Materials and Devices for the Internet of Things written by Li Tao and published by Elsevier. This book was released on 2020-06-12 with total page 348 pages. Available in PDF, EPUB and Kindle. Book excerpt: Emerging 2D Materials and Devices for the Internet of Things: Information, Sensing and Energy Applications summarizes state-of-the-art technologies in applying 2D layered materials, discusses energy and sensing device applications as essential infrastructure solutions, and explores designs that will make internet-of-things devices faster, more reliable and more accessible for the creation of mass-market products. The book focuses on information, energy and sensing applications, showing how different types of 2D materials are being used to create a new generation of products and devices that harness the capabilities of wireless technology in an eco-efficient, reliable way. This book is an important resource for both materials scientists and engineers, who are designing new wireless products in a variety of industry sectors. Explores how 2D materials are being used to create faster and more reliable wireless network solutions Discusses how graphene-based nanocomposites are being used for energy harvesting and storage applications Outlines the major challenges for integrating 2D materials in electronic sensing devices

Download or read book Electronic Transport in 2D Materials with Strong Spin orbit Coupling written by Artem Pulkin and published by . This book was released on 2017 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt: Mots-clés de l'auteur: 2D materials ; transition metal dichalcogenides ; line defects ; domain boundaries ; spin-orbit coupling ; density functional theory ; ballistic transport ; spin current ; quantum spin Hall effect ; topological insulators.

Download or read book Electronic Transport Theories written by Navinder Singh and published by CRC Press. This book was released on 2016-11-17 with total page 240 pages. Available in PDF, EPUB and Kindle. Book excerpt: Maintaining a practical perspective, Electronic Transport Theories: From Weakly to Strongly Correlated Materials provides an integrative overview and comprehensive coverage of electronic transport with pedagogy in view. It covers traditional theories, such as the Boltzmann transport equation and the Kubo formula, along with recent theories of transport in strongly correlated materials. The understood case of electronic transport in metals is treated first, and then transport issues in strange metals are reviewed. Topics discussed are: the Drude-Lorentz theory; the traditional Bloch-Boltzmann theory and the Grüneisen formula; the Nyquist theorem and its formulation by Callen and Welton; the Kubo formalism; the Langevin equation approach; the Wölfle-Götze memory function formalism; the Kohn-Luttinger theory of transport; and some recent theories dealing with strange metals. This book is an invaluable resource for undergraduate students, post-graduate students, and researchers with a background in quantum mechanics, statistical mechanics, and mathematical methods.

Download or read book Advanced Physics of Electron Transport in Semiconductors and Nanostructures written by Massimo V. Fischetti and published by Springer. This book was released on 2016-05-20 with total page 481 pages. Available in PDF, EPUB and Kindle. Book excerpt: This textbook is aimed at second-year graduate students in Physics, Electrical Engineering, or Materials Science. It presents a rigorous introduction to electronic transport in solids, especially at the nanometer scale.Understanding electronic transport in solids requires some basic knowledge of Hamiltonian Classical Mechanics, Quantum Mechanics, Condensed Matter Theory, and Statistical Mechanics. Hence, this book discusses those sub-topics which are required to deal with electronic transport in a single, self-contained course. This will be useful for students who intend to work in academia or the nano/ micro-electronics industry.Further topics covered include: the theory of energy bands in crystals, of second quantization and elementary excitations in solids, of the dielectric properties of semiconductors with an emphasis on dielectric screening and coupled interfacial modes, of electron scattering with phonons, plasmons, electrons and photons, of the derivation of transport equations in semiconductors and semiconductor nanostructures somewhat at the quantum level, but mainly at the semi-classical level. The text presents examples relevant to current research, thus not only about Si, but also about III-V compound semiconductors, nanowires, graphene and graphene nanoribbons. In particular, the text gives major emphasis to plane-wave methods applied to the electronic structure of solids, both DFT and empirical pseudopotentials, always paying attention to their effects on electronic transport and its numerical treatment. The core of the text is electronic transport, with ample discussions of the transport equations derived both in the quantum picture (the Liouville-von Neumann equation) and semi-classically (the Boltzmann transport equation, BTE). An advanced chapter, Chapter 18, is strictly related to the ‘tricky’ transition from the time-reversible Liouville-von Neumann equation to the time-irreversible Green’s functions, to the density-matrix formalism and, classically, to the Boltzmann transport equation. Finally, several methods for solving the BTE are also reviewed, including the method of moments, iterative methods, direct matrix inversion, Cellular Automata and Monte Carlo. Four appendices complete the text.

Download or read book Low Dimensional Electronic Systems written by Guenther Neubauer and published by Springer Science & Business Media. This book was released on 2013-03-13 with total page 367 pages. Available in PDF, EPUB and Kindle. Book excerpt: Owing to new physical, technological, and device concepts of low-dimensionalelectronic systems, the physics and fabrication of quasi-zero, one- and two-dimensional systems are rapidly growing fields. The contributions presented in this volume cover results of nanostructure fabrication including recently developed techniques, for example, tunneling probe techniques and molecular beam epitaxy, quantum transport including the integer and fractional quantum Hall effect, optical and transport studies of the two-dimensional Wigner solid, phonon studies of low-dimensional systems, and Si/SiGe heterostructures and superlattices. To the readers new in the field this volume gives a comprehensive introduction and for the experts it is an update of their knowledge and a great help for decisions about future research activities.

Download or read book Electronic and Transport Properties of Novel Two Dimensional Materials written by Muhammad Sufyan Ramzan 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 Electronic Transport in Two Dimensional Systems with Defects written by Lucas Miranda and published by . This book was released on 2023 with total page 0 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Two Dimensional Electronics and Optoelectronics written by and published by . This book was released on 2017 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt: Annotation The discovery of monolayer graphene led to a Nobel Prize in Physics being awarded in 2010. This has stimulated further research on a wide variety of two-dimensional (2D) layered materials. The coupling of metallic graphene, semiconducting 2D transition metal dichalcogenides (TMDCs) and black phosphorus have attracted a tremendous amount of interest in new electronic and optoelectronic applications. Together with other 2D materials, such as the wide band gap boron nitride nanosheets (BNNSs), all these 2D materials have led towards an emerging field of van der Waal 2D heterostructures. The papers in this book were originally published by Electronics (MDPI) in a Special Issue on "Two-Dimensional Electronics and Optoelectronics." The book consists of eight papers, including two review articles, covering various pertinent and fascinating issues concerning 2D materials and devices. Further, the potential and the challenges of 2D materials are discussed, which provide up to date guidance for future research and development.

Download or read book Defect Engineering of Two Dimensional Electronically Functional Materials written by Fu Zhang and published by . This book was released on 2019 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt: In this thesis, we have carried out a systematic study on the material synthesis, state-of-the-art characterization and property investigations of transition metal dichalcogenides (TMDs) and their heterostructures by defect engineering. First, a defect-controlled approach for the nucleation and epitaxial growth of WSe2 on hBN is demonstrated. The results reveal an important nucleation mechanism for epitaxial growth of van der Waals heterostructures and indicate that hBN is a superior substrate for synthesizing single crystal TMD films, exhibiting a reduced density of inverted domain boundaries and improved optical and electronic properties. Second, we discuss the synthesis of high quality superconducting -phase molybdenum carbide (-Mo2C) flakes and 2D molybdenum carbide/disulfide heterostructures exhibiting higher superconducting transition temperatures, an insight into the formation mechanism and possible epitaxial-strained or moir configurations of MoS2/-MoC are discussed to explain the latter. Third, we have used a plasma-assisted method to introduce carbon-hydrogen (CH) units within monolayer WS2 for the first time. The carbon doping leads to reduction of the optical band gap, and the electronic transport gradually becomes entirely p-type behavior as the carbon doping level increases. Fourth, we have successfully used a single-step powder vaporization method to synthesis vanadium-doped WS2 (V-WS2) monolayers with a wide spectrum of vanadium concentrations. Interestingly, as-synthesized V-WS2 monolayers show a consistent reduction of the optical bandgap and the emergence of the p-type transport branch (reaching ambipolarity), as a function of vanadium concentration. In addition, ferromagnetic ordering is simultaneously induced in monolayer V-WS2 at room temperature and reaches optimal at ~2%at. vanadium concentrations. We have demonstrated that the electronic, optical and magnetic properties of TMDs could be tuned by defect engineering such as introducing foreign atoms into the lattice or by heterostacks formation. Mechanisms associated with these changes were also elucidated. The results summarized in this thesis could contribute to the fabrication of next-generation optoelectronic, magneto-optical and magneto-electronic devices, which is foreseen that 2D materials could have practical applications in the near future.

Download or read book Charge Transport in Two dimensional Materials and Their Electronic Applications written by Himani Arora and published by . This book was released on 2020 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Electrical Transport in Suspended Two dimensional Materials written by Fenglin Wang and published by . This book was released on 2015 with total page 130 pages. Available in PDF, EPUB and Kindle. Book excerpt: Recently, the realization of one-dimensional electrical contacts to hexagonal-boron nitride-encapsulated samples points a direction for transport studies of 2D materials. For instance, such MoS2 devices with graphene contacts have demonstrated unprecedented mobility. Furthermore, heterostructures consisting of various 2D atomic layers may be built to create artificial superlattices, thus enable the exploration of novel phenomena and devices with new functionalities.

Download or read book Tunable Electronic and Optical Properties of Low dimensional Materials written by Shiyuan Gao and published by . This book was released on 2018 with total page 117 pages. Available in PDF, EPUB and Kindle. Book excerpt: Two-dimensional (2D) materials with single or a few atomic layers, such as graphene, hexagonal boron nitride (h-BN) and transition metal dichalcogenides (TMDCs), and the heterostructures or one-dimensional (1D) nanostructures they form, have attracted much attention recently as unique platforms for studying many condensed-matter phenomena and holds great potentials for nanoelectronics and optoelectronic applications. Apart from their unique intrinsic properties which has been intensively studied for over a decade by now, they also allow external control of many degrees of freedom, such as electrical gating, doping and layer stacking. In this thesis, I present a theoretical study of the electronic and optical properties of many different 2D materials and nanostructures using first-principles density functional theory and many-body perturbation theory. I will show what we learn from these theoretical calculations about the relation between the partially extended, partially confined structure and the tunability of their electronic and optical properties with free-carrier doping and electrical gating. First, we investigate the effect of free-carrier doping on the quasiparticle and exciton properties of 2D material. On one hand, we discuss the origin of the doping-induced band gap renormalization in 2D materials and demonstrate the simplifications that can be made to the theory to allow more efficient calculation. On the other hand, using MoS2 as an example, we study the effect of dynamical screening on the electron-hole interaction and excitonic properties in doped 2D material using the Bethe-Salpeter Equation. Combining them, we show that the quasiparticle band gap of 2D material drops as a non-linear function of doping density by several hundred meV due to the free-carrier screening, but this is offset by the drop in the exciton binding energy and makes the exciton energy remain nearly constant. Then, we switch gear to study the effect of electrical gating on excitons in bilayer TMDC heterostructures. We reveal the important role of interlayer coupling in deciding the band alignment and excitonic properties. We show that due to the interlayer coupling of valence states, the excitons are superpositions of intralayer and interlayer electron-hole pairs which can be described by a simple tight-binding model. As a result, their dipole oscillator strength and radiative lifetime can be tuned by over an order of magnitude with a practical external gate field of a few V/nm. Finally, we study the effect of quantum confinement on the formation of magnetism in confined nanostructures. In two one-dimensional structures, graphene nanoribbon and tellurium chain, we find doped free-carriers can have half-metallic ferromagnetic ground state due to the Stoner mechanism. This comes from the quantum-confinement of the electronic state which enhances the density of state and Stoner parameter at the same time. For graphene nanoribbons, we find magnetism in general edge types with large spin polarization energy up to 17 meV/carrier. It can bypass the requirement of specific zigzag edge in previous proposals of graphene nanoribbon magnetism. For tellurium chain, we find magnetic ground state with a significant 6 meV/carrier spin-polarization energy. Due to the strong spin-orbit interaction of tellurium and its unique helical chain structure with chirality, the spins of the magnetic carriers are pinned along a specific direction with an enhanced magnetic anisotropy energy that is larger than the spin-polarization energy, making it of broad interest for spintronics applications.

Download or read book Electrical Transport and Microwave Study of a Correlated Two dimensional Electron System written by Daniela Tabrea 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 Electrical Transport Studies on a Disordered Two Dimensional Electron System written by Kevin Eng and published by . This book was released on 2002 with total page 222 pages. Available in PDF, EPUB and Kindle. Book excerpt: