Download or read book Advances in Superconducting Infinite Layer and Related Nickelates written by Matthias Hepting and published by Frontiers Media SA. This book was released on 2022-11-17 with total page 150 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Investigation of Unconventional Superconductivity in Infinite layer Nickelates written by Bai Yang Wang and published by . This book was released on 2022 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt: More than one century after the initial discovery of superconductivity in mercury, there remain entire classes of materials whose superconducting mechanisms have yet to be elucidated. One major avenue through which experimentalists contribute in this research has been nding new examples of unconventional superconductors. A recent trend in this material search is to combine traditional material synthesis methods with novel sample manipulation techniques in pursuit of materials in novel geometries. For example, topotactic reduction has demonstrated impressive capabilities to modify oxygen stoichiometry and achieving extreme valence states of 3d transition metal ions in complex oxide systems. In this thesis, I will introduce the in nite-layer nickelates obtained using this method as a new family of 3d-transition-metal-based unconventional superconductors. I will show that this system is a local type-II superconductor with singlet pairing and nodal superconducting gap structure, whose upper critical eld generically violates the Pauli limit and whose super uid density is so low that the superconductivity might be phase coherence limited. I will further identify the importance of rare earth 4f moments in shaping the superconductivity. Overall, I hope to show that this new system presents an additional source of experimental insight into unconventional superconductivity.
Download or read book Superconducting Materials written by A. Tampieri and published by World Scientific. This book was released on 2000 with total page 380 pages. Available in PDF, EPUB and Kindle. Book excerpt: This volume consists of lectures highlighting fundamentals of advances in superconducting materials, related technologies and applications. Theory, fundamental aspects, advances in materials synthesis, processing and properties are featured, as well as current developments of superconducting components and devices.Both HTC and LTC superconducting materials are discussed. Several years after the discovery of high Tc superconductivity and a multinational effort in its study, this book collects the main results on the subject and presents a state-of-the-art view of the correlations between crystal chemistry and physical properties.
Download or read book Superconductors written by Alexander Gabovich and published by BoD – Books on Demand. This book was released on 2015-08-24 with total page 282 pages. Available in PDF, EPUB and Kindle. Book excerpt: The chapters included in the book describe recent developments in the field of superconductivity. The book deals with both the experiment and the theory. Superconducting and normal-state properties are studied by various methods. The authors presented investigations of traditional and new materials. In particular, studies of oxides, pnictides, chalcogenides and intermetallic compounds are included. The superconducting order parameter symmetry is discussed and consequences of its actual non-conventional symmetry are studied. Impurity and tunneling effects (both quasiparticle and Josephson ones) are among topics covered in the chapters. Special attention is paid to the competition between superconductivity and other instabilities, which lead to the Fermi surface gapping.
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 Advances in Scanning Transmission Electron Microscopy for Materials Discovery and Innovation written by Berit Hansen Goodge and published by . This book was released on 2022 with total page 0 pages. Available in PDF, EPUB and Kindle. Book excerpt: Subtle interplay between structure, charge, and spin in the atomic lattice is the fundamental driver of the functional properties in crystalline quantum materials. These effects can be so subtle that in many cases just a few misplaced atoms are enough to change or suppress the desired material properties entirely. Probing these materials with quantitative detail at the atomic scale therefore offers key insights to the close link between material form and function. The scanning transmission electron microscope (STEM) is a powerful tool which grants access to detailed, quantitative measurements of such properties at the atomic scale. Here, a combination of high spatial-resolution imaging and high energy-resolution electron energy loss spectroscopy (EELS) is harnessed to probe local effects in a variety of quantum materials and these insights are further leveraged for the strategic design of new, tunable materials. Atomic-resolution imaging and spectroscopy rely on certain strict prerequisites ranging from sample suitability to environmental stability of the laboratory.Furthermore, the spatially localized measurements which are critical to understanding the fundamental physics at play in quantum systems can be limited by the practical realities of a material's robustness to measurement. Many quantum materials, however, are sensitive to radiation doses typically applied by the STEM probe, and the exotic phenomena they host exist only at cryogenic temperatures. These considerations have traditionally limited both the materials and the conditions which are studied, confined mostly to robust crystalline materials and ambient temperatures. Accessing exotic states in the STEM therefore necessitates significant advances in experimental capabilities, which are realized here through detector, sample stage, and electron source improvements. Together, these advances open the door to exploring both new materials and new phases in the STEM. Unconventional superconductivity is perhaps one of the most widely-studied phenomena in condensed matter physics, yet in many aspects remains one of the most mysterious. Here we study a subset of superconducting oxides exemplifies a few of the key questions in this field. Copper-based compounds are the prototypical "high-temperature'' superconductors, exhibiting remarkably robust superconductivity with critical temperatures reaching well over 100 K. Early theoretical predictions that nickel-based compounds with similar crystal and electronic structure could host similar properties were finally offered a platform for experimental validation with the discovery of superconducting infinite-layer nickelate thin films in 2019. Despite the nominal similarities between cuprates and nickelates, however, our STEM-EELS measurements reveals notable differences in the electronic landscape of these materials. These local measurements are key to disentangling which properties of the nickelate system reflect challenges of materials synthesis and which reflect the fundamental physics at work. But not all oxide superconductors are so closely related: in stark contrast to the cuprates, superconductivity in Sr2RuO4 is extremely sensitive to crystalline disorder. Local STEM-EELS measurements or Sr2RuO4thin films are used here to extract and characterize different types of disorder in the atomic lattice, thereby illustrating their distinct impacts on superconductivity. The STEM provides unique access to understanding the atomic-scale structures and interactions which impart functional or exotic properties to quantum materials. Detailed quantitative studies of oxide interfaces here inspire new approaches for symmetry templating oxide monolayers. Leveraging the insights of atomic-resolution STEM across a breadth of systems thus inspires and informs new methods for tunably controlling electronic properties in designer compounds.
Download or read book Electronic Structure of Rare Earth Nickelates from First Principles written by Harrison LaBollita and published by Springer Nature. This book was released on with total page 109 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Observation of Superconductivity in Epitaxially Grown Atomic Layers written by Satoru Ichinokura and published by Springer. This book was released on 2017-11-01 with total page 135 pages. Available in PDF, EPUB and Kindle. Book excerpt: This thesis presents first observations of superconductivity in one- or two-atomic-scale thin layer materials. The thesis begins with a historical overview of superconductivity and the electronic structure of two-dimensional materials, and mentions that these key ingredients lead to the possibility of the two-dimensional superconductor with high phase-transition temperature and critical magnetic field. Thereafter, the thesis moves its focus onto the implemented experiments, in which mainly two different materials thallium-deposited silicon surfaces and metal-intercalated bilayer graphenes, are used. The study of the first material is the first experimental demonstration of both a gigantic Rashba effect and superconductivity in the materials supposed to be superconductors without spatial inversion symmetry. The study of the latter material is relevant to superconductivity in a bilayer graphene, which was a big experimental challenge for a decade, and has been first achieved by the author. The description of the generic and innovative measurement technique, highly effective in probing electric resistivity of ultra-thin materials unstable in an ambient environment, makes this thesis a valuable source for researchers not only in surface physics but also in nano-materials science and other condensed-matter physics.
Download or read book Advances in Superconductivity written by Springer and published by . This book was released on 1995-11-01 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Controlling Collective Electronic States in Cuprates and Nickelates written by Martin Bluschke and published by Springer Nature. This book was released on 2020-07-27 with total page 170 pages. Available in PDF, EPUB and Kindle. Book excerpt: In this thesis chemical and epitaxial degrees of freedom are used to manipulate charge and spin ordering phenomena in two families of transition metal oxides, while taking advantage of state-of-the-art resonant x-ray scattering (RXS) methods to characterize their microscopic origin in a comprehensive manner. First, the relationship of charge density wave order to both magnetism and the "pseudogap" phenomenon is systematically examined as a function of charge-carrier doping and isovalent chemical substitution in single crystals of a copper oxide high-temperature superconductor. Then, in copper oxide thin films, an unusual three-dimensionally long-range-ordered charge density wave state is discovered, which persists to much higher temperatures than charge-ordered states in other high-temperature superconductors. By combining crystallographic and spectroscopic measurements, the origin of this phenomenon is traced to the epitaxial relationship with the underlying substrate. This discovery opens new perspectives for the investigation of charge order and its influence on the electronic properties of the cuprates. In a separate set of RXS experiments on superlattices with alternating nickel and dysprosium oxides, several temperature- and magnetic-field-induced magnetic phase transitions are discovered. These observations are explained in a model based on transfer of magnetic order and magneto-crystalline anisotropy between the Ni and Dy subsystems, thus establishing a novel model system for the interplay between transition-metal and rare-earth magnetism.
Download or read book Studies of High Temperature Superconductors written by A. V. Narlikar and published by . This book was released on 1992 with total page 362 pages. Available in PDF, EPUB and Kindle. Book excerpt: Six papers by physicists from the Japan, India, Brazil and the US address some of the broad frontal issues of superconductivity, which include the mechanisms of high-temperature superconductivity, extra-high-temperature phenomena, the normal state pseudogap, the observations of the isotope effect in a host of different superconducting systems and their explanations, and the unusual features of strongly correlated electron systems like heavy fermions. Two extended papers explore the importance of positron annihilation and using electron spin resonance techniques to study superconducting materials. The treatments should be accessible to working scientists and engineers and to graduate students of physics, chemistry, materials science, solid-state electronics, and other disciplines.
Download or read book Introduction to Spectroscopic Ellipsometry of Thin Film Materials written by Andrew T. S. Wee and published by John Wiley & Sons. This book was released on 2022-03-08 with total page 213 pages. Available in PDF, EPUB and Kindle. Book excerpt: A one-of-a-kind text offering an introduction to the use of spectroscopic ellipsometry for novel material characterization In Introduction to Spectroscopic Ellipsometry of Thin Film Materials: Instrumentation, Data Analysis and Applications, a team of eminent researchers delivers an incisive exploration of how the traditional experimental technique of spectroscopic ellipsometry is used to characterize the intrinsic properties of novel materials. The book focuses on the scientifically and technologically important two-dimensional transition metal dichalcogenides (2D-TMDs), magnetic oxides like manganite materials, and unconventional superconductors, including copper oxide systems. The distinguished authors discuss the characterization of properties, like electronic structures, interfacial properties, and the consequent quasiparticle dynamics in novel quantum materials. Along with illustrative and specific case studies on how spectroscopic ellipsometry is used to study the optical and quasiparticle properties of novel systems, the book includes: Thorough introductions to the basic principles of spectroscopic ellipsometry and strongly correlated systems, including copper oxides and manganites Comprehensive explorations of two-dimensional transition metal dichalcogenides Practical discussions of single layer graphene systems and nickelate systems In-depth examinations of potential future developments and applications of spectroscopic ellipsometry Perfect for master’s- and PhD-level students in physics and chemistry, Introduction to Spectroscopic Ellipsometry of Thin Film Materials will also earn a place in the libraries of those studying materials science seeking a one-stop reference for the applications of spectroscopic ellipsometry to novel developed materials.
Download or read book Lanthanides written by Peng Cheng and published by Elsevier. This book was released on 2023-08-17 with total page 770 pages. Available in PDF, EPUB and Kindle. Book excerpt: Lanthanides: Fundamentals and Applications provides the fundamentals, new research, promising applications and future outlooks of lanthanide compounds and lanthanide-based materials. The book begins with an introduction, including key concepts, oxidation states and sources, extraction and separation of the lanthanides, followed by spectroscopic and magnetic properties, and metals, crystals and compounds. Organometallic compounds, coordination compounds, molecular magnetic materials and luminescent materials are covered before a discussion of specific lanthanide applications. Spintronics, bioimaging, photoelectric materials, catalysis and nuclear applications are discussed. This comprehensive resource is ideal for researchers and students studying inorganic and materials chemistry, in both academia and industry. - Includes comprehensive and in-depth coverage of lanthanides - Features the most current research progress on lanthanides - Covers a combination view of fundamental research and specific applications of the lanthanides, including spintronics, bioimaging and additives for photoelectric materials
Download or read book New Challenges in Superconductivity Experimental Advances and Emerging Theories written by J. Ashkenazi and published by Springer. This book was released on 2005-11-02 with total page 266 pages. Available in PDF, EPUB and Kindle. Book excerpt: This volume contains the proceedings of the 2004 University of Miami Workshop on Unconventional Superconductivity. The workshop was the fourth in a series of successful meetings on High-T Superconductivity and C related topics, which took place at the James L. Knight Physics Building on the University of Miami campus in Coral Gables, Florida, in January 1991, 1995, 1999, and 2004. The workshop consisted of two consecutive events: 1. NATO Advanced Research Workshop (ARW) on New Challenges in Superconductivity: Experimental Advances and Emerging Theories, held on January 11-14, 2004; 2. Symposium on Emerging Mechanisms for High Temperature Superconductivity (SEMHTS), held on January 15-16, 2004. It is hard to write a balanced preface to a volume like this one, yet at least we try to offer the reader a taste of what was happening in this workshop. There were close to a hundred scientists from around the world, albeit fewer Russians than we had originally hoped for. Nevertheless, the workshop was very lively and we trust that this is demonstrated in this volume. The workshop included high-quality presentations on state of the art works, yet a key issue, discussed by many, was how homogeneous the cuprates are. STM data, as well as other reports, showed that the cuprate superconductors (SC’s) studied were inhomogeneous, especially in the underdoped regime; while experiments, like ARPES and magnetoresistance have established the existence of a Fermi Surface (FS), at least above some doping level, in the cuprates.
Download or read book Electronic Structure of Rare Earth Nickelates from First Principles written by Harrison LaBollita and published by Springer. This book was released on 2024-10-28 with total page 0 pages. Available in PDF, EPUB and Kindle. Book excerpt: This thesis demonstrates the value of theoretical approaches in the discovery of new superconducting materials. It reports a detailed study of the recently discovered nickel-oxide (nickelate) superconductors using multiple first-principles computational tools, from density functional theory to dynamical mean field theory. In the context of superconductivity, discoveries have generally been linked to serendipitous experimental discovery; this thesis reports some of the few examples of predictions of new superconductors that have later been realized in practice, a prime example of the significance of the methodology it expounds. Overall, it represents a seminal systematic work in the electronic structure theory of the emergent field of nickelate superconductivity.
Download or read book Electronic and Structural Properties of LaNiO3 Based Heterostructures written by Jennifer Fowlie and published by Springer. This book was released on 2019-03-29 with total page 101 pages. Available in PDF, EPUB and Kindle. Book excerpt: This thesis explores an amazing family of oxide compounds - the nickelates - known for their metal-to-insulator transition and, in the case of LaNiO3, to be a possible building block for designing a synthetic high Tc superconductor. Competition between various fascinating phases makes these materials very sensitive to external parameters and it is thus possible to dramatically tune their properties. This work on ultrathin LaNiO3 and the solid solution Nd1-xLaxNiO3 has important implications for the search for superconductivity in this class of materials.
Download or read book The Physics of Organic Superconductors and Conductors written by Andrei Lebed and published by Springer Science & Business Media. This book was released on 2008-03-26 with total page 754 pages. Available in PDF, EPUB and Kindle. Book excerpt: This bang up-to-date volume contains the distilled wisdom of some of the world’s leading minds on the subject. Inside, there is a treasure trove of general (tutorial) and topical reviews, written by leading researchers in the area of organic superconductors and conductors. The papers hail from all over the world, as far afield as the USA and Australia. They cover contemporary topics such as unconventional superconductivity, non-Fermi-liquid properties, and the quantum Hall effect.
