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Author : Alexandros Shailos
Publisher :
ISBN 13 :
Total Pages : 222 pages
Book Rating : 4.:/5 (612 download)
Download or read book Spin-dependent Transport Phenomena in Single and Coupled Quantum Point Contacts written by Alexandros Shailos and published by . This book was released on 2004 with total page 222 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Author : Christoph Michel
Publisher : Cuvillier Verlag
ISBN 13 : 3867274851
Total Pages : 205 pages
Book Rating : 4.8/5 (672 download)
Download or read book Theoretical Studies of Spin Dependent Transport Phenomena written by Christoph Michel and published by Cuvillier Verlag. This book was released on 2007 with total page 205 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Author : Supriyo Bandyopadhyay
Publisher : CRC Press
ISBN 13 : 148225557X
Total Pages : 650 pages
Book Rating : 4.4/5 (822 download)
Download or read book Introduction to Spintronics written by Supriyo Bandyopadhyay and published by CRC Press. This book was released on 2015-09-18 with total page 650 pages. Available in PDF, EPUB and Kindle. Book excerpt: Introduction to Spintronics provides an accessible, organized, and progressive presentation of the quantum mechanical concept of spin and the technology of using it to store, process, and communicate information. Fully updated and expanded to 18 chapters, this Second Edition:Reflects the explosion of study in spin-related physics, addressing seven
Author : A. M. Bychkov
Publisher :
ISBN 13 :
Total Pages : 4 pages
Book Rating : 4.:/5 (742 download)
Download or read book Spin-Dependent Electron Behaviour in Quantum Point Contacts and Dots written by A. M. Bychkov and published by . This book was released on 2000 with total page 4 pages. Available in PDF, EPUB and Kindle. Book excerpt: We investigate theoretically the effect of spontaneous electron spin polarization in quantum point contacts and quantum dots. Self-consistent calculation process has been developed in the framework of Kohn-Sham LSDA scheme. The existence of the detected spin-polarized states in the low-density regime can be used to explain an anomalous 0.7-structure in the conductance of quantum point contacts. The properties of the potential device based on such an effect are briefly discussed.
Author :
Publisher :
ISBN 13 :
Total Pages : 800 pages
Book Rating : 4.F/5 ( download)
Download or read book Dissertation Abstracts International written by and published by . This book was released on 2008 with total page 800 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Author : Erik Johan Koop
Publisher :
ISBN 13 : 9789036735308
Total Pages : 132 pages
Book Rating : 4.7/5 (353 download)
Download or read book Electron Spin Transport in Quantum Dots and Point Contacts written by Erik Johan Koop and published by . This book was released on 2008 with total page 132 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Author : Stephan Lowitzer
Publisher :
ISBN 13 : 9783832526290
Total Pages : 0 pages
Book Rating : 4.5/5 (262 download)
Download or read book Relativistic Electronic Transport Theory written by Stephan Lowitzer and published by . This book was released on 2010 with total page 0 pages. Available in PDF, EPUB and Kindle. Book excerpt: Spintronics is an emerging technology that exploits the intrinsic spin of the electron and its associated magnetic moment in addition to its fundamental electronic charge. The central issue of this multidisciplinary field is the manipulation of the spin degree of freedom in solid-state systems. Discoveries in recent years have inspired a new route in spintronic research which needs no ferromagnetic components. The research field "spintronic without magnetism" is based on the possibility to manipulate electric currents via spin-orbit coupling only. The spin Hall effect (SHE) is one of the most promising effects for the generation of spin polarized currents which is even present in non-magnetic materials. The SHE appears when an electric current flows through a medium with spin-orbit coupling present, leading to a spin-current perpendicular to the charge current. In this work the SHE as well as the anomalous Hall effect (AHE) are investigated on a first principles level using the spin-polarized fully relativistic Korringa-Kohn-Rostoker Green's function method (SPR-KKR-GF) in conjunction with the linear response Kubo-Streda formalism. Intrinsic as well as extrinsic contributions to the SHE/AHE are treated on equal footing. This opened up for the first time the possibility to reliably decompose the SHE/AHE into skew and side-jump scattering as well as intrinsic contributions in a quantitative manner.
Author : Markus König
Publisher :
ISBN 13 :
Total Pages : 166 pages
Book Rating : 4.:/5 (246 download)
Download or read book Spin Related Transport Phenomena in HgTe-based Quantum Well Structures written by Markus König and published by . This book was released on 2007 with total page 166 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Author : Martin Sebastian Zöllner
Publisher :
ISBN 13 :
Total Pages : 0 pages
Book Rating : 4.:/5 (115 download)
Download or read book First-principles Investigation of Puzzling Spin-dependent Transport Phenomena in Molecular and Nanostructured Systems written by Martin Sebastian Zöllner and published by . This book was released on 2019 with total page 0 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Author : Mikhail I. Dyakonov
Publisher : Springer
ISBN 13 : 9783540871446
Total Pages : 442 pages
Book Rating : 4.8/5 (714 download)
Download or read book Spin Physics in Semiconductors written by Mikhail I. Dyakonov and published by Springer. This book was released on 2009-08-29 with total page 442 pages. Available in PDF, EPUB and Kindle. Book excerpt: The purpose of this collective book is to present a non-exhaustive survey of sp- related phenomena in semiconductors with a focus on recent research. In some sense it may be regarded as an updated version of theOpticalOrientation book, which was entirely devoted to spin physics in bulk semiconductors. During the 24 years that have elapsed, we have witnessed, on the one hand, an extraordinary development in the wonderful semiconductor physics in two dim- sions with the accompanying revolutionary applications. On the other hand, during the last maybe 15 years there was a strong revival in the interest in spin phen- ena, in particular in low-dimensional semiconductor structures. While in the 1970s and 1980s the entire world population of researchers in the ?eld never exceeded 20 persons, now it can be counted by the hundreds and the number of publications by the thousands. This explosive growth is stimulated, to a large extent, by the hopes that the electron and/or nuclear spins in a semiconductor will help to accomplish the dream of factorizing large numbers by quantum computing and eventually to develop a new spin-based electronics, or “spintronics”. Whether any of this will happen or not, still remains to be seen. Anyway, these ideas have resulted in a large body of interesting and exciting research, which is a good thing by itself. The ?eld of spin physics in semiconductors is extremely rich and interesting with many spectacular effects in optics and transport.
Author : Yang Song
Publisher :
ISBN 13 :
Total Pages : 211 pages
Book Rating : 4.:/5 (868 download)
Download or read book Theory of Intrinsic Spin-dependent Transport in Semiconductors and Two-dimensional Membranes written by Yang Song and published by . This book was released on 2013 with total page 211 pages. Available in PDF, EPUB and Kindle. Book excerpt: "A reliable theoretical framework is developed for spin-dependent transport in the presence of electron-phonon interactions. The centerpiece of the theory explores the symmetry of the studied systems and processes. In addition, microscopic kinetic processes are incorporated. Rigorous numerical methods are employed in order to verify our predictions. Applying the theory to potential key semiconductors for spintronics, such as silicon and germanium, and to the nascent material family of two-dimensional membranes, one obtains physical clarity as well as explicit analytical results. Following the construction of electronic and phonon states, we derive spin-dependent electronphonon scattering matrix elements for all processes induced by acoustic or optical phonons (including transparent derivations of important two-phonon processes in two-dimensional membranes), intravalley or intervalley scattering for multivalley conduction bands, and interband scattering for the gapless graphene. The resulting expressions are explicit functions of electron wavevectors, spin orientation, phonon modes and valley positions. Using the acquired insights, remarkable physical consequences are discovered. These include optimal spin transport in Si by combining strain and geometrical constrains, extremely long room-temperature spin lifetime in strained Ge when the spin is oriented parallel to a [111] strain (~1 [mu]s), and ultrafast electron spin relaxation in single-layer transition-metal dichalcogenides. By the unique properties of two-dimensional membranes inherited from their mirror symmetry and out-of-plane softness, we notice decoupling between spin and momentum transport due to scattering with out-of-plane acoustic phonons (the most populous branch). By symmetry analysis of orbital configurations, contrasting spin splitting and spin flip constants are predicted for the conduction bands of various single-layer transition-metal dichalcogenides. In addition to transport phenomena, we also apply the theory to optical excitation of hot excitons. Incorporating microscopic spin-flip results into Boltzmann transport equations, one can explore spin communication applications. Apart from spin relaxation, spin injection and detection are also key phases. We study tunnel-barrier profiles that are complicated by doping inhomogeneity, and quantify the limitations on the applied bias due to detrimental spin relaxation of hot electrons in zinc-blende semiconductors. Importantly, we elaborate dynamic signals of high-frequency devices, and noncollinear magnetization configurations of the electrodes to discuss optimal information density"--Page vii-viii.
Author : Evgeny Y. Tsymbal
Publisher : CRC Press
ISBN 13 : 1439803773
Total Pages : 809 pages
Book Rating : 4.4/5 (398 download)
Download or read book Handbook of Spin Transport and Magnetism written by Evgeny Y. Tsymbal and published by CRC Press. This book was released on 2011-08-25 with total page 809 pages. Available in PDF, EPUB and Kindle. Book excerpt: In the past several decades, the research on spin transport and magnetism has led to remarkable scientific and technological breakthroughs, including Albert Fert and Peter Grünberg’s Nobel Prize-winning discovery of giant magnetoresistance (GMR) in magnetic metallic multilayers. Handbook of Spin Transport and Magnetism provides a comprehensive, balanced account of the state of the art in the field known as spin electronics or spintronics. It reveals how key phenomena first discovered in one class of materials, such as spin injection in metals, have been revisited decades later in other materials systems, including silicon, organic semiconductors, carbon nanotubes, graphene, and carefully engineered nanostructures. The first section of the book offers a historical and personal perspective of the field written by Nobel Prize laureate Albert Fert. The second section addresses physical phenomena, such as GMR, in hybrid structures of ferromagnetic and normal metals. The third section discusses recent developments in spin-dependent tunneling, including magnetic tunnel junctions with ferroelectric barriers. In the fourth section, the contributors look at how to control spin and magnetism in semiconductors. In the fifth section, they examine phenomena typically found in nanostructures made from metals, superconductors, molecular magnets, carbon nanotubes, quantum dots, and graphene. The final section covers novel spin-based applications, including advanced magnetic sensors, nonvolatile magnetoresistive random access memory, and semiconductor spin-lasers. The techniques and materials of spintronics have rapidly evolved in recent years, leading to vast improvements in hard drive storage and magnetic sensing. With extensive cross-references between chapters, this seminal handbook provides a complete guide to spin transport and magnetism across various classes of materials and structures.
Author : Jonathan P. Bird
Publisher : Springer Science & Business Media
ISBN 13 : 1461504376
Total Pages : 481 pages
Book Rating : 4.4/5 (615 download)
Download or read book Electron Transport in Quantum Dots written by Jonathan P. Bird and published by Springer Science & Business Media. This book was released on 2013-11-27 with total page 481 pages. Available in PDF, EPUB and Kindle. Book excerpt: When I was contacted by Kluwer Academic Publishers in the Fall of 200 I, inviting me to edit a volume of papers on the issue of electron transport in quantum dots, I was excited by what I saw as an ideal opportunity to provide an overview of a field of research that has made significant contributions in recent years, both to our understanding of fundamental physics, and to the development of novel nanoelectronic technologies. The need for such a volume seemed to be made more pressing by the fact that few comprehensive reviews of this topic have appeared in the literature, in spite of the vast activity in this area over the course of the last decade or so. With this motivation, I set out to try to compile a volume that would fairly reflect the wide range of opinions that has emerged in the study of electron transport in quantum dots. Indeed, there has been no effort on my part to ensure any consistency between the different chapters, since I would prefer that this volume instead serve as a useful forum for the debate of critical issues in this still developing field. In this matter, I have been assisted greatly by the excellent series of articles provided by the different authors, who are widely recognized as some of the leaders in this vital area of research.
Author : Evgeny Y. Tsymbal
Publisher : CRC Press
ISBN 13 : 042980525X
Total Pages : 555 pages
Book Rating : 4.4/5 (298 download)
Download or read book Spintronics Handbook, Second Edition: Spin Transport and Magnetism written by Evgeny Y. Tsymbal and published by CRC Press. This book was released on 2019-06-26 with total page 555 pages. Available in PDF, EPUB and Kindle. Book excerpt: Spintronics Handbook, Second Edition offers an update on the single most comprehensive survey of the two intertwined fields of spintronics and magnetism, covering the diverse array of materials and structures, including silicon, organic semiconductors, carbon nanotubes, graphene, and engineered nanostructures. It focuses on seminal pioneering work, together with the latest in cutting-edge advances, notably extended discussion of two-dimensional materials beyond graphene, topological insulators, skyrmions, and molecular spintronics. The main sections cover physical phenomena, spin-dependent tunneling, control of spin and magnetism in semiconductors, and spin-based applications. Features: Presents the most comprehensive reference text for the overlapping fields of spintronics (spin transport) and magnetism. Covers the full spectrum of materials and structures, from silicon and organic semiconductors to carbon nanotubes, graphene, and engineered nanostructures. Extends coverage of two-dimensional materials beyond graphene, including molybdenum disulfide and study of their spin relaxation mechanisms Includes new dedicated chapters on cutting-edge topics such as spin-orbit torques, topological insulators, half metals, complex oxide materials and skyrmions. Discusses important emerging areas of spintronics with superconductors, spin-wave spintronics, benchmarking of spintronics devices, and theory and experimental approaches to molecular spintronics. Evgeny Tsymbal's research is focused on computational materials science aiming at the understanding of fundamental properties of advanced ferromagnetic and ferroelectric nanostructures and materials relevant to nanoelectronics and spintronics. He is a George Holmes University Distinguished Professor at the Department of Physics and Astronomy of the University of Nebraska-Lincoln (UNL), Director of the UNL’s Materials Research Science and Engineering Center (MRSEC), and Director of the multi-institutional Center for NanoFerroic Devices (CNFD). Igor Žutić received his Ph.D. in theoretical physics at the University of Minnesota. His work spans a range of topics from high-temperature superconductors and ferromagnetism that can get stronger as the temperature is increased, to prediction of various spin-based devices. He is a recipient of 2006 National Science Foundation CAREER Award, 2005 National Research Council/American Society for Engineering Education Postdoctoral Research Award, and the National Research Council Fellowship (2003-2005). His research is supported by the National Science Foundation, the Office of Naval Research, the Department of Energy, and the Airforce Office of Scientific Research.
Author : Youngsoo Yoon
Publisher :
ISBN 13 :
Total Pages : 149 pages
Book Rating : 4.:/5 (276 download)
Download or read book Readout of Electron Spins in Quantum Point Contacts written by Youngsoo Yoon and published by . This book was released on 2008 with total page 149 pages. Available in PDF, EPUB and Kindle. Book excerpt: This thesis is motivated by recent interest in the binding of single spins on quantum point contacts (QPCs). While this regime is inaccessible to experiments performed on single QPCs, this thesis provides strong evidence for the spin binding by studying the interaction between coupled QPCs, one of which is biased in the regime where the spin binding is expected to occur. Thus, this thesis describes a series of experiments aimed at understanding and manipulating single electron spins confined in QPCs, with the long term goal of the implementation of a QPC-based quantum computer. In these experimental studies, we demonstrate a resonant interaction between closely coupled QPCs due to bound-state formation, and show that this may give rise to robust confinement of single spins, which show clear Zeeman splitting in a magnetic field. Our experimental investigations of the resonance exhibited by coupled QPCs clearly show that this feature is consistent with the Fano form, providing strong independent support for the idea of bound-state formation in QPCs near pinch-off. Although the Fano mechanism is typically the dominant effect responsible for the coupled-QPC interaction, we also demonstrate evidence of a crossover from Fano to Coulomb coupling between the QPCs as their wavefunction overlap, and so the Fano mechanism, is suppressed. We show also that the coupling strength characterizing the Fano effect grows as the two QPCs are brought closer to one another. Finally, we discuss the observation of a novel nonlinear Fano effect, by using source-drain bias spectroscopy of coupled QPCs. The key result here is that the coupling strength between the resonant and non-resonant paths can be tuned in situ, starting from weak coupling in the linear (small source-drain bias) regime but becoming stronger at large bias.
Author : Ralph Peter Hornberger
Publisher :
ISBN 13 :
Total Pages : 103 pages
Book Rating : 4.:/5 (633 download)
Download or read book Spin Transport Through Coupled Quantum Dots written by Ralph Peter Hornberger and published by . This book was released on 2007 with total page 103 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Author : Lydia L. Sohn
Publisher : Springer Science & Business Media
ISBN 13 : 9401588392
Total Pages : 680 pages
Book Rating : 4.4/5 (15 download)
Download or read book Mesoscopic Electron Transport written by Lydia L. Sohn and published by Springer Science & Business Media. This book was released on 2013-06-29 with total page 680 pages. Available in PDF, EPUB and Kindle. Book excerpt: Ongoing developments in nanofabrication technology and the availability of novel materials have led to the emergence and evolution of new topics for mesoscopic research, including scanning-tunnelling microscopic studies of few-atom metallic clusters, discrete energy level spectroscopy, the prediction of Kondo-type physics in the transport properties of quantum dots, time dependent effects, and the properties of interacting systems, e.g. of Luttinger liquids. The overall understanding of each of these areas is still incomplete; nevertheless, with the foundations laid by studies in the more traditional systems there is no doubt that these new areas will advance mesoscopic electron transport to a new phenomenological level, both experimentally and theoretically. Mesoscopic Electron Transport highlights selected areas in the field, provides a comprehensive review of such systems, and also serves as an introduction to the new and developing areas of mesoscopic electron transport.
