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Nanostructure Physics Of Non Isolated Quantum Well Of Symmetric Double Barrier
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Book Synopsis Nanostructure Physics of non-isolated Quantum Well of symmetric double barrier by : Sujaul Chowdhury
Download or read book Nanostructure Physics of non-isolated Quantum Well of symmetric double barrier written by Sujaul Chowdhury and published by GRIN Verlag. This book was released on 2013-03-20 with total page 140 pages. Available in PDF, EPUB and Kindle. Book excerpt: Master's Thesis from the year 2011 in the subject Physics - Other, Shahjalal University of Science and Technology (Department of Physics), course: Nanostructure Physics, language: English, abstract: The book deals with pure Nanostructure Physics; it contains thorough and complete analytical calculations leading to equation(s) obeyed by quasi-bound energy levels of non-isolated Quantum Well of symmetric rectangular double barrier as well as of symmetric double barrier of general shape. Methodology and Physics involved with the calculations is also clearly described. WKB method has been used in the case of symmetric double barrier of general shape. The book also contains necessary background on Quantum Mechanics, Microelectronics, Nanostructure Physics and WKB method to enable readers assimilate the book completely. The book explores and makes well documented, with thorough and complete calculation and discussion, pure Physics of semiconductor nanostructures.
Book Synopsis Nanostructure Physics of a Quantum Well adjacent to a tunnel barrier by : Dr Sujaul Chowdhury
Download or read book Nanostructure Physics of a Quantum Well adjacent to a tunnel barrier written by Dr Sujaul Chowdhury and published by GRIN Verlag. This book was released on 2014-05-22 with total page 102 pages. Available in PDF, EPUB and Kindle. Book excerpt: Master's Thesis from the year 2014 in the subject Physics - Quantum Physics, Shahjalal University of Science and Technology (Department of Physics), course: Nanostructure Physics, language: English, abstract: We have investigated Nanostructure Physics of a Quantum Well (QW) adjacent to a tunnel barrier. On the other side of the QW, we have a barrier layer of semi-infinite thickness. The book contains thorough and complete analytical calculations leading to two transcendental equations obeyed by quasi-bound energy levels of the QW. The book also contains numerical investigation of parametric variations of the quasi-bound energy levels. The variations are quite unexpected. For some values of tunnel barrier width and height, each quasi-bound energy level yields two allowed energy levels. The two equations reduce to those for isolated QW in proper limiting values of parameters. The book contains necessary background on Quantum Mechanics, Microelectronics and Nanostructure Physics to enable readers assimilate the book completely.
Book Synopsis Oscillatory transmission through non-tunneling regime of symmetric rectangular double barrier by : Dr Sujaul Chowdhury
Download or read book Oscillatory transmission through non-tunneling regime of symmetric rectangular double barrier written by Dr Sujaul Chowdhury and published by GRIN Verlag. This book was released on 2013-07-16 with total page 136 pages. Available in PDF, EPUB and Kindle. Book excerpt: Master's Thesis from the year 2013 in the subject Physics - Quantum Physics, Shahjalal University of Science and Technology (Department of Physics), course: Nanostructure Physics, language: English, abstract: We have numerically investigated parametric variations of transmission peaks of symmetric rectangular double barrier in non-tunneling regime. We have compared the variations with those for tunneling regime. One of the three variations in non-tunneling regime is completely different from that for tunneling regime warranting rapid dissemination. The book contains background on Quantum Mechanics, Microelectronics and Nanostructure Physics to enable readers assimilate the book completely.
Book Synopsis WKB METHOD IN NANOSTRUCTURE PHYSICS OF A QUANTUM WELL ADJACENT TO A TUNNEL BARRIER OF GENERAL SHAPE by : Sujaul Chowdhury
Download or read book WKB METHOD IN NANOSTRUCTURE PHYSICS OF A QUANTUM WELL ADJACENT TO A TUNNEL BARRIER OF GENERAL SHAPE written by Sujaul Chowdhury and published by American Academic Press. This book was released on 2015-02-09 with total page 131 pages. Available in PDF, EPUB and Kindle. Book excerpt: The book deals with pure Nanostructure Physics of a Quantum Well (QW) of general shape adjacent to a tunnel barrier of general shape. On the other side of the QW, we have a barrier of semi-infinite thickness. Using WKB approximation method, the book presents thorough and complete analytical calculations leading to 2 transcendental equations obeyed by quasi-bound energy levels of the non-isolated QW. The 2 general equations have been applied to the cases when the tunnel barrier is rectangular, moderately biased rectangular, triangular and Schottky barrier. Thorough numerical investigations have been reported to bring out parametric variations of the energy levels. For some values of tunnel barrier height and width, the energy levels split into doublets. The book contains a thorough introduction to WKB method; the book also contains necessary background on Microelectronics and Nanostructure Physics to enable readers assimilate the book completely. The 1st 3 chapters are introductory while chapter 4 and 5 are exclusive and original contributions of the book.
Book Synopsis COUPLED QUANTUM WELL IN LONGITUDINAL MAGNETIC FIELD by : Uttam Kumar Chowdhury
Download or read book COUPLED QUANTUM WELL IN LONGITUDINAL MAGNETIC FIELD written by Uttam Kumar Chowdhury and published by American Academic Press. This book was released on 2017-02-22 with total page 152 pages. Available in PDF, EPUB and Kindle. Book excerpt: The book deals with pure Nanostructure Physics of tunneling regime of GaAs-AlGaAs Coupled Quantum Well (CQW) in presence of magnetic field perpendicular to GaAs-AlGaAs interfaces. The book presents thorough and complete analytical calculations leading to a transcendental equation obeyed by the magnetic field dependent quasi-bound energy levels of CQW. Thorough numerical investigations are reported to bring out effects of the magnetic field on the quasi-bound energy levels. The effects have been successfully and completely explained in terms of a magnetic field dependent effective potential. The book has comprehensive analytical and numerical account of the problem. The book contains background on Quantum Mechanics, Microelectronics, Nanostructure Physics and Classical Mechanics to enable readers assimilate the book completely.
Book Synopsis Quantum Mechanics for Nanostructures by : Vladimir Vasilʹevich Mitin
Download or read book Quantum Mechanics for Nanostructures written by Vladimir Vasilʹevich Mitin and published by Cambridge University Press. This book was released on 2010-05-20 with total page 449 pages. Available in PDF, EPUB and Kindle. Book excerpt: Textbook introducing engineers to quantum mechanics and nanostructures, covering the fundamentals and applications to nanoscale materials and nanodevices.
Book Synopsis Oscillatory Transmission Through Non-tunneling Regime of Isolated Quantum Well by : Sujaul Chowdhury
Download or read book Oscillatory Transmission Through Non-tunneling Regime of Isolated Quantum Well written by Sujaul Chowdhury and published by . This book was released on 2013 with total page 170 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Numerical Exploration of Isolated GaAs-AlGaAs Quantum Well by : Sujaul Chowdhury
Download or read book Numerical Exploration of Isolated GaAs-AlGaAs Quantum Well written by Sujaul Chowdhury and published by Springer. This book was released on 2024-05-04 with total page 0 pages. Available in PDF, EPUB and Kindle. Book excerpt: This book begins with the eigenvalue equation of energy and presents calculation of the energy spectrum of GaAs-AlGaAs Quantum Well using finite difference method and knowledge of potential energy profile, without using expressions for eigenfunctions, continuity of eigenfunctions, or their spatial derivatives at the two abrupt potential steps. The authors find that the results are almost the same as those obtained by solving numerically using regula falsi method, and transcendental equations that are obeyed by the energy levels, where the transcendental equations are obtained by requiring continuity of eigenfunctions and of their spatial derivatives at the two potential steps. Thus, this book confirms that it is possible to numerically calculate the energy spectrum of Quantum Well by the finite difference method when it is not correct or when it is not possible to use continuity of eigenfunctions and their spatial derivatives at the two abrupt potential steps. The authors also showthat it is possible to use the finite difference method in cases where the potential steps are non-abrupt. The book demonstrates this by calculating the energy spectrum of isolated parabolic Quantum Well of finite depth using finite difference method.
Book Synopsis The Physics of Low-dimensional Structures by : Georgios P. Triberis
Download or read book The Physics of Low-dimensional Structures written by Georgios P. Triberis and published by . This book was released on 2007 with total page 0 pages. Available in PDF, EPUB and Kindle. Book excerpt: This book covers the field of low dimensional structures, starting from the selectively doped double heterostructures n-A1GaAs/GaAs/n-A1GaAs, and (strained) p-Si/SiGe/p-Si (quantum wells). The behaviour of the sheet electron density, the subband populations and energies as a function of the well width, the spacer thickness and the doping concentration is analysed. The temperature dependence of the bulk electron concentration versus the quasi-2DEG are discussed. In the framework of Boltzmann's transport theory a detailed study of the mobility is presented at low and high temperatures taking into account all the relevant scattering mechanisms. The pseudomorphic Si/SiGe undoped quantum wells are a perfect example for the study of the non-parabolicity of the hole-bands. For the first time in a book an exact solution of the multiband effective mass equation that describes the heavy, light and split-off hole valence bands is introduced, and interband transitions and selection rules are obtained. Reducing dimensionality new aspects concerning optical and transport properties of quantum wires (QWRS) is discussed. Specifically, the photoluminescence and the microphotoluminescence spectra of V-shaped QWRS is theoretically interpreted leading to a realistic cartography of the interface roughness of these systems. A computational approach for the solution of the eigenvalue problem in low-dimensional systems of complex but realistic geometry is also presented for the first time in a book, and transport theoretical considerations will lead to a systematic study of the mobility. As DNA could be considered as a one-dimensional "molecular wire" the study of carrier transport along DNA is discussed in terms of hopping transport. A computational scheme is presented which allows the study of near-field magnetoabsorpsion spectra of Quantum Dots (QD) of any given geometry, under magnetic field of any orientation. The effect of the spatial confinement imposed by the QD dimensions and the magnetic confinement governed by the magnetic field are explored. The influence of the Coulomb interactions between electrons and holes is also discussed. The applicability of the method in actual experiments, i.e. the illumination of a nanostructure with a near-field probe in conjunction with the simultaneous application of an external magnetic field, may become a challenge to experimentalists. Finally, magnetothermoelectic transport in the fractional quantum Hall effect (FQHE) regime is discussed. The theoretical framework for the calculation of the resistivity, the thermopower and the thermal conductivity for two-dimensional electron and hole gases, at low temperatures and strong perpendicular magnetic fields is outlined. The composite fermion picture enables the use of the integer quantum Hall effect and Shubnikov - de Haas conductivity models for a quantitative comparison with experiment. A study on the validity of fundamental physical laws such as the Wiedemann-Franz law in two-dimensional structures is also presented.
Book Synopsis Quantum Wells, Wires and Dots by : Paul Harrison
Download or read book Quantum Wells, Wires and Dots written by Paul Harrison and published by John Wiley & Sons. This book was released on 2016-04-26 with total page 624 pages. Available in PDF, EPUB and Kindle. Book excerpt: Quantum Wells, Wires and Dots provides all the essential information, both theoretical and computational, to develop an understanding of the electronic, optical and transport properties of these semiconductor nanostructures. The book will lead the reader through comprehensive explanations and mathematical derivations to the point where they can design semiconductor nanostructures with the required electronic and optical properties for exploitation in these technologies. This fully revised and updated 4th edition features new sections that incorporate modern techniques and extensive new material including: Properties of non-parabolic energy bands Matrix solutions of the Poisson and Schrödinger equations Critical thickness of strained materials Carrier scattering by interface roughness, alloy disorder and impurities Density matrix transport modelling Thermal modelling Written by well-known authors in the field of semiconductor nanostructures and quantum optoelectronics, this user-friendly guide is presented in a lucid style with easy to follow steps, illustrative examples and questions and computational problems in each chapter to help the reader build solid foundations of understanding to a level where they can initiate their own theoretical investigations. Suitable for postgraduate students of semiconductor and condensed matter physics, the book is essential to all those researching in academic and industrial laboratories worldwide. Instructors can contact the authors directly ([email protected] / [email protected]) for Solutions to the problems.
Download or read book Quantum Dots written by T. Chakraborty and published by Elsevier. This book was released on 1999-11-30 with total page 348 pages. Available in PDF, EPUB and Kindle. Book excerpt: This book deals with the electronic and optical properties of two low-dimensional systems: quantum dots and quantum antidots and is divided into two parts. Part one is a self-contained monograph which describes in detail the theoretical and experimental background for exploration of electronic states of the quantum-confined systems. Starting from the single-electron picture of the system, the book describes various experimental methods that provide important information on these systems. Concentrating on many-electron systems, theoretical developments are described in detail and their experimental consequences are also discussed. The field has witnessed an almost explosive growth and some of the future directions of explorations are highlighted towards the end of the monograph. The subject matter is dealt with in such a way that it is both accessible to beginners and useful for expert researchers as a comprehensive review of most of the developments in the field. Furthermore the book contains 37 reprinted articles which have been selected to provide a first-hand picture of the overall developments in the field. The early papers have been arranged to portray the developments chronologically, and the more recent papers provide an overview of future direction in the research.
Download or read book Physics Briefs written by and published by . This book was released on 1994 with total page 1162 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Physics and Technology of Submicron Structures by : Helmut Heinrich
Download or read book Physics and Technology of Submicron Structures written by Helmut Heinrich and published by Springer. This book was released on 1988 with total page 312 pages. Available in PDF, EPUB and Kindle. Book excerpt: This volume presents a discussion of the latest results in the physics of low-dimensional structures. At the winter school major breakthroughs were reported, and some of the excitement of the participants is reflected in the contributions. The topics treated range from the fabrication of microstructures and the physical background of future semiconductor devices to vertical transport in nanostructures, universal conductance fluctuations, and the transition from two-dimensional to one-dimensional conduction in semiconductor structures.
Book Synopsis Ultimate Physics by : Scientific American Editors
Download or read book Ultimate Physics written by Scientific American Editors and published by Scientific American. This book was released on 2016-07-11 with total page 226 pages. Available in PDF, EPUB and Kindle. Book excerpt: The fundamental outlines of the physical world, from its tiniest particles to massive galaxy clusters, have been apparent for decades. Does this mean physicists are about to tie it all up into a neat package? Not at all. Just when you think you’re figuring it out, the universe begins to look its strangest. This eBook, “Ultimate Physics: From Quarks to the Cosmos,” illustrates clearly how answers often lead to more questions and open up new paths to insight. We open with “The Higgs at Last,” which looks behind the scenes of one of the most anticipated discoveries in physics and examines how this “Higgs-like” particle both confirmed and confounded expectations. In “The Inner Life of Quarks,” author Don Lincoln discusses evidence that quarks and leptons may not be the smallest building blocks of matter. Section Two switches from the smallest to the largest of scales, and in “Origin of the Universe,” Michael Turner analyzes a number of speculative scenarios about how it all began. Another two articles examine the mystery of dark energy and some doubts as to whether it exists at all. In the last section, we look at one of the most compelling problems in physics: how to tie together the very small and the very large – quantum mechanics and general relativity. In one article, Stephen Hawking and Leonard Mlodinow argue that a so-called “theory of everything” may be out of reach, and in another, David Deutsch and Artur Ekert question the view that quantum mechanics imposes limits on knowledge, arguing instead that the theory has an intricacy that allows for new, practical technologies, including powerful computers that can reach their true potential.
Book Synopsis The Physics of Quantum Mechanics by : James Binney
Download or read book The Physics of Quantum Mechanics written by James Binney and published by Oxford University Press, USA. This book was released on 2013-12 with total page 408 pages. Available in PDF, EPUB and Kindle. Book excerpt: This title gives students a good understanding of how quantum mechanics describes the material world. The text stresses the continuity between the quantum world and the classical world, which is merely an approximation to the quantum world.
Download or read book JETP Letters written by and published by . This book was released on 1995 with total page 564 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Many-Body Quantum Theory in Condensed Matter Physics by : Henrik Bruus
Download or read book Many-Body Quantum Theory in Condensed Matter Physics written by Henrik Bruus and published by Oxford University Press. This book was released on 2004-09-02 with total page 458 pages. Available in PDF, EPUB and Kindle. Book excerpt: The book is an introduction to quantum field theory applied to condensed matter physics. The topics cover modern applications in electron systems and electronic properties of mesoscopic systems and nanosystems. The textbook is developed for a graduate or advanced undergraduate course with exercises which aim at giving students the ability to confront real problems.
