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Electronic Transport Theory Of The Spin Dependent Proximity Effect In Superconductor Ferromagnet Heterostructures
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Book Synopsis Electronic Transport Theory of the Spin-Dependent Proximity Effect in Superconductor-Ferromagnet Heterostructures by : Peter Machon
Download or read book Electronic Transport Theory of the Spin-Dependent Proximity Effect in Superconductor-Ferromagnet Heterostructures written by Peter Machon and published by . This book was released on 2017 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Proximity and Flux Pinning Effects in Superconductor-ferromagnet Hybrids by : Xavier Palermo
Download or read book Proximity and Flux Pinning Effects in Superconductor-ferromagnet Hybrids written by Xavier Palermo and published by . This book was released on 2019 with total page 0 pages. Available in PDF, EPUB and Kindle. Book excerpt: Superconductor-ferromagnet hybrid systems often bring about new physics and may as well be useful to design new non-volatile, high-density memory devices for superconducting electronics.In this thesis, we study two different types of SF hybrids, each following a possible approach to memory devices, but focusing on fundamental aspects. One is about the proximity effect in oxide heterostructures. In these, triplet correlations appear, that are both superconducting and spin-polarized. These enable using effects from spintronics like GMR, but are also very dependent on interface properties. We investigated these in SFS oxide trilayers by conductance measurements. These showed oscillations which may, in part, be related to these triplet states. We also observed that interface effects affect the electronic properties of the ferromagnet, especially when that layer is thin. Another type of interaction occurs through stray magnetic fields from the domain structures. Recent theoretical proposals suggested that small swirling spin textures called skyrmions could similarly interact with superconductivity through this mechanism. We investigated such coupling in bilayers, in which the superconducting vortex dynamics dominate the transport properties. We found that the presence of skyrmions and domains alike enhances the critical current. It also leads to an unusual Hall effect in the superconducting state. Most of these properties can be explained qualitatively in terms of vortex pinning and guided motion.
Book Synopsis Spintronics Handbook, Second Edition: Spin Transport and Magnetism by : Evgeny Y. Tsymbal
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 646 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.
Book Synopsis Handbook of Spin Transport and Magnetism by : Evgeny Y. Tsymbal
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 2016-04-19 with total page 797 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 Grunberg's Nobel Prize-winning discovery of giant magnetoresistance (GMR) in magnetic metallic multilayers. Handbook of Spin Transport and Magnetism provides a comprehensive, bal
Book Synopsis Electronic and Spin Dependent Phenomena in Two-dimensional Materials and Heterostructures by : Jinsong Xu (Ph. D. in physics)
Download or read book Electronic and Spin Dependent Phenomena in Two-dimensional Materials and Heterostructures written by Jinsong Xu (Ph. D. in physics) and published by . This book was released on 2018 with total page 156 pages. Available in PDF, EPUB and Kindle. Book excerpt: Graphene has remarkable opportunities for spintronics due to its high mobility and long spin diffusion length, especially when encapsulated in hexagonal boron nitride (h-BN). Beyond the three basic processes of spin injection, spin transport, and spin detection, it is crucial to explore new methods of spin manipulation in order to develop novel architectures for spin-based logic. In the first chapter of this thesis, I briefly introduce the field of spintronics and graphene related research. In the second chapter, I present the spin diffusion model used in this thesis to analyze spin transport in graphene and heterostructures spintronics. In the third chapter, I present my work on gate-tunable spin transport in h-BN encapsulated graphene-based spin valves with one-dimensional ferromagnetic contacts. The non-local spin signal can be tuned by gate voltage and even change polarity. The gate-controlled spin polarity via magnetic proximity effect may overcome the usual need for an applied magnetic field and a magnetization reversal to implement the graphene-based spin logic. Beyond magnetic proximity effect, another route for graphene spintronics is to combine with other two-dimensional (2D) materials, such as transition metal dichalcogenide (TMDC). In the fourth chapter, I demonstrate spin injection from monolayer MoS2 to few-layer graphene following optical valley/spin exciation in MoS2 with circularly polarized light up to room temperature. The magnitude and direction of spin polarization is controlled by both helicity and photon energy. These results demonstrate a 2D spintronic/valleytronic system that achieves optical spin injection and lateral spin transport at room temperature in a single device, which paves the way for multifunctional 2D spintronic devices for memory and logic applications. While graphene/TMDC heterostructures hold great promise for the electrical and optical control of spins in graphene, the observed spin lifetimes in these heterostructures are short (
Book Synopsis Superconductors at the Nanoscale by : Roger Wördenweber
Download or read book Superconductors at the Nanoscale written by Roger Wördenweber and published by Walter de Gruyter GmbH & Co KG. This book was released on 2017-09-11 with total page 590 pages. Available in PDF, EPUB and Kindle. Book excerpt: By covering theory, design, and fabrication of nanostructured superconducting materials, this monograph is an invaluable resource for research and development. Examples are energy saving solutions, healthcare, and communication technologies. Key ingredients are nanopatterned materials which help to improve the superconducting critical parameters and performance of superconducting devices, and lead to novel functionalities. Contents Tutorial on nanostructured superconductors Imaging vortices in superconductors: from the atomic scale to macroscopic distances Probing vortex dynamics on a single vortex level by scanning ac-susceptibility microscopy STM studies of vortex cores in strongly confined nanoscale superconductors Type-1.5 superconductivity Direct visualization of vortex patterns in superconductors with competing vortex-vortex interactions Vortex dynamics in nanofabricated chemical solution deposition high-temperature superconducting films Artificial pinning sites and their applications Vortices at microwave frequencies Physics and operation of superconducting single-photon devices Josephson and charging effect in mesoscopic superconducting devices NanoSQUIDs: Basics & recent advances Bi2Sr2CaCu2O8 intrinsic Josephson junction stacks as emitters of terahertz radiation| Interference phenomena in superconductor-ferromagnet hybrids Spin-orbit interactions, spin currents, and magnetization dynamics in superconductor/ferromagnet hybrids Superconductor/ferromagnet hybrids
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 Coherent Transport in Superconducting and Ferromagnetic Hybrid Systems by : Daniel Huertas Hernando
Download or read book Coherent Transport in Superconducting and Ferromagnetic Hybrid Systems written by Daniel Huertas Hernando and published by Delft University Press. This book was released on 2002-01-01 with total page 119 pages. Available in PDF, EPUB and Kindle. Book excerpt: Contents of this doctoral dissertation include: Conductance modulation by spin precession in non-collinear F-N-F systems, Theory of angular magnetoresistance in CPP spin valves, Generalized boundary conditions for the circuit theory of mesoscopic transport, Absolute spin-valve effect with superconducting proximity structures, Superconducting/magnetic proximity effect in diffusive wires
Book Synopsis Fundamentals and Frontiers of the Josephson Effect by : Francesco Tafuri
Download or read book Fundamentals and Frontiers of the Josephson Effect written by Francesco Tafuri and published by Springer Nature. This book was released on 2019-09-17 with total page 859 pages. Available in PDF, EPUB and Kindle. Book excerpt: This book provides a comprehensive and up-to-date description of the Josephson effect, a topic of never-ending interest in both fundamental and applied physics. In this volume, world-renowned experts present the unique aspects of the physics of the Josephson effect, resulting from the use of new materials, of hybrid architectures and from the possibility of realizing nanoscale junctions. These new experimental capabilities lead to systems where novel coherent phenomena and transport processes emerge. All this is of great relevance and impact, especially when combined with the didactic approach of the book. The reader will benefit from a general and modern view of coherent phenomena in weakly-coupled superconductors on a macroscopic scale. Topics that have been only recently discussed in specialized papers and in short reviews are described here for the first time and organized in a general framework. An important section of the book is also devoted to applications, with focus on long-term, future applications. In addition to a significant number of illustrations, the book includes numerous tables for comparative studies on technical aspects.
Book Synopsis Relativistic Electronic Transport Theory by : Stephan Lowitzer
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.
Book Synopsis Proximity Effect in Superconductor-ferromagnet Systems by : Jian Zhu
Download or read book Proximity Effect in Superconductor-ferromagnet Systems written by Jian Zhu and published by . This book was released on 2010 with total page 137 pages. Available in PDF, EPUB and Kindle. Book excerpt: The proximity effect in superconductor (SC) - ferromagnet (FM) system produces many interesting phenomena due to the interplay between two competing orderings, superconductivity and ferromagnetism. This dissertation studies the influence of the orientation of magnetic moments on the superconducting transition temperature (Tc̳) in FM/SC/FM sandwiched structures. The superconducting transition temperature of a FM/SC/FM spin valve depends on the mutual orientation of the magnetic moments of the ferromagnetic layers. This phenomenon, called the spin switch effect, has been previously observed in FM/SC/FM systems as a Tc̳ difference between parallel and antiparallel configurations of the ferromagnetic layers. Both standard (TP̳c̳ TA̳P̳c̳) and inverse (TP̳c̳ TA̳P̳̳c̳) spin switch effects have been reported in different superconducting spin valve systems but the origin of the inverse spin switch effect was not understood. In this dissertation, a discovery of the coexistence of the standard and inverse spin switch effects in Ni1 Fe19 /Nb/Ni1 Fe19 /Ir25 Mn--5 spin valves is described. The measurements reveal that the inverse spin switch effect originates from dissipative flow of vortices induced by stray magnetic field of magnetostatically coupled Neel domain wall pairs in the ferromagnetic layers. This dissertation also studies the Tc̳ of FM/SC/FM sandwiched systems with noncollinear (neither parallel nor antiparallel) orientation of the magnetic moments of the ferromagnetic layers, where the odd triplet superconducting component is predicated to arise. Tc̳ in Cu48 Ni52 /Nb/Cu48 Ni52 trilayers as a function of the angle between the Cu48 Ni52 layer magnetizations is measured. The shape of the observed angular dependence ofTc̳ is in qualitative agreement with SC/FM proximity theories that account for the odd triplet component of the condensate, but large discrepancy in the magnitude is found.
Book Synopsis Advanced Magnetic and Optical Materials by : Ashutosh Tiwari
Download or read book Advanced Magnetic and Optical Materials written by Ashutosh Tiwari and published by John Wiley & Sons. This book was released on 2016-11-29 with total page 560 pages. Available in PDF, EPUB and Kindle. Book excerpt: Advanced Magnetic and OpticalMaterials offers detailed up-to-date chapters on the functional optical and magnetic materials, engineering of quantum structures, high-tech magnets, characterization and new applications. It brings together innovative methodologies and strategies adopted in the research and development of the subject and all the contributors are established specialists in the research area. The 14 chapters are organized in two parts: Part 1: Magnetic Materials Magnetic Heterostructures and superconducting order Magnetic Antiresonance in nanocomposites Magnetic bioactive glass-ceramics for bone healing and hyperthermic treatment of solid tumors Magnetic iron oxide nanoparticles Magnetic nanomaterial-based anticancer therapy Theoretical study of strained carbon-based nanobelts: Structural, energetical, electronic, and magnetic properties Room temperature molecular magnets – Modeling and applications Part 2: Optical Materials Advances and future of white LED phosphors for solid-state lighting Design of luminescent materials with “Turn-on/off” response for anions and cations Recent advancements in luminescent materials and their potential applications Strongly confined quantum dots: Emission limiting, photonic doping, and magneto-optical effects Microstructure characterization of some quantum dots synthesized by mechanical alloying Advances in functional luminescent materials and phosphors Development in organic light emitting materials and their potential applications
Book Synopsis Functional Nanostructures and Metamaterials for Superconducting Spintronics by : Anatolie Sidorenko
Download or read book Functional Nanostructures and Metamaterials for Superconducting Spintronics written by Anatolie Sidorenko and published by Springer. This book was released on 2018-06-20 with total page 279 pages. Available in PDF, EPUB and Kindle. Book excerpt: This book demonstrates how the new phenomena in the nanometer scale serve as the basis for the invention and development of novel nanoelectronic devices and how they are used for engineering nanostructures and metamaterials with unusual properties. It discusses topics such as superconducting spin-valve effect and thermal spin transport, which are important for developing spintronics; fabrication of nanostructures from antagonistic materials like ferromagnets and superconductors, which lead to a novel non-conventional FFLO-superconducting state; calculations of functional nanostructures with an exotic triplet superconductivity, which are the basis for novel nanoelectronic devices, such as superconducting spin valve, thin-film superconducting quantum interference devices (SQUIDs) and memory-elements (MRAM). Starting with theoretical chapters about triplet superconductivity, the book then introduces new ideas and approaches in the fundamentals of superconducting electronics. It presents various quantum devices based on the new theoretical approaches, demonstrating the enormous potential of the electronics of 21st century - spintronics. The book is useful for a broad audience, including researchers, engineers, PhD graduates, students and others wanting to gain insights into the frontiers of nanoscience.
Book Synopsis Electronic Transport in Topological Superconducting Heterostructures by : Joseph Jude Cuozzo
Download or read book Electronic Transport in Topological Superconducting Heterostructures written by Joseph Jude Cuozzo and published by . This book was released on 2022 with total page 0 pages. Available in PDF, EPUB and Kindle. Book excerpt: In this dissertation, we study Andreev transport and Josephson effects in topological superconducting heterostructures. We study consider two platforms: quantum Hall-superconductor (QH-SC) heterostructures and Josephson junctions. In the first platform, we study QH graphene-SC systems with a focus on the influence symmetry-breaking effects have on Andreev transport. In graphene, valley and spin degeneracy lead to an approximate SU(4) symmetry that is reflected in the approximate 4-fold degeneracy of graphene's Landau levels (LL). We develop an effective low-energy description of Andreev edge states that takes into account the correction to the drift velocity of the QH-SC edge modes due to SU(4) symmetry-breaking effects. We show that Zeeman and valley splitting effects can be used to demonstrate Andreev edge state interference. We also present numerical simulations of Andreev conversion in the lowest LL of canted antiferromagnetic graphene. In the second platform, we analyze Josephson effects and the microwave response of Josephson junctions. We propose a theory for a Leggett collective mode in Dirac semimetals-based Josephson junctions and simulate the microwave response of the junction. We also study Landau-Zener transitions (LZT) between Andreev bound states in Josephson junctions. We present a protocol using superconducting quantum interference devices to differentiate between LZTs between Andreev states, which mimic signatures of Majoranas, and systems with real Majoranas.
Book Synopsis Interplay of Proximity Effects in Superconductor/ferromagnet Heterostructures by : Annika Stellhorn
Download or read book Interplay of Proximity Effects in Superconductor/ferromagnet Heterostructures written by Annika Stellhorn and published by . This book was released on 2021 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Nonequilibrium Superconductivity by : D. N. Langenberg
Download or read book Nonequilibrium Superconductivity written by D. N. Langenberg and published by North Holland. This book was released on 1986 with total page 732 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Spin Transport and Proximity Effect in Nanoscale Superconductor Hybrid Structures by : Michael Johannes Wolf
Download or read book Spin Transport and Proximity Effect in Nanoscale Superconductor Hybrid Structures written by Michael Johannes Wolf and published by . This book was released on 2013 with total page 105 pages. Available in PDF, EPUB and Kindle. Book excerpt:
