Download or read book Mesoscopic Superconductor 2 dimensional Electron Gas Superconductor Junctions written by Lucas Cornelis Mur and published by . This book was released on 1998 with total page 101 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Mesoscopic Phases in Superconducting Electron Systems written by Philip Adam Kratz and published by . This book was released on 2019 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt: This thesis explores the conditions under which topological and other exotic superconducting phases may develop and their relationships to disorder and transmission modes in mesoscopic systems, where quantum coherence effects are relevant. First, building on Ginzburg-Landau effective field theory and a London equations phenomenological model for spatially inhomogeneous superconductors with anisotropic order parameters, I discuss experimental resolution limits for scanning superconducting quantum interference device (SQUID) susceptometry applied to superconductors exhibiting spatial structure on the scale of the coherence length. Resolution limits in the presence of structural disorder are quantified with theoretical analysis and experimental susceptometry measurements on controlled, nanofabricated hole array structures in niobium films. I discuss potential applications to experimental studies of electronic phase separation and structural disorder in unconventional superconductors and strongly correlated electron systems. Next, I discuss local susceptibility measurements on few-quintuple layer ternary 3D topological insulator (TI) bismuth selenide superconductor bilayers with niobium films. These measurements are motivated by predictions of pairing between helical Dirac carriers in the two-dimensional surface electron gas that lead to emergent properties such as supersymmetry and Majorana quasiparticles. We observe both local suppression and enhancement of diamagnetic susceptibility and critical temperature, which is consistent with structural and lattice disorder in the superconducting films. I discuss several implications for experimental susceptibility measurements of 3D TI NS bilayers using numerical solutions to semiclassical Usadel differential equations in the dirty-limit for superconductor-normal bilayers based on the Eilenberger-Larkin-Ovchinikov approximation. The final part of this dissertation discusses recent measurements of current-phase relations in SNS Josephson junctions on graphene-hBN Van der Waals heterostructures in finite magnetic fields, where we have observed anomalous phase shifts in the current-phase relations near the Dirac point. At the time of this writing, these effects are still not well understood. Our observations appear to be consistent with $\varphi_0$-junction behavior, recently observed in semiconductor quantum dot systems with large spin-orbit coupling, which is indicative of time-reversal and chiral symmetry breaking effects. Qualitatively similar phase shifts have also been observed in magnetoconductance measurements on these devices in the quantum Hall regime by our collaborators, but at much higher magnetic fields ($B> 1$ T). In our measurements at lower fields, this suggests that mixing between electron and hole modes may occur through delocalized states in the ballistic junctions, rather than strictly through scattering in quantum Hall edge states. Broadly, the results presented in this work hopefully will provide a basis for advancing future theoretical and experimental work towards understanding the interplay between topological phases and superconductivity in engineered quantum nanostructures and quantum materials.

Download or read book Superconductor Semiconductor Junctions written by Thomas Schäpers and published by Springer Science & Business Media. This book was released on 2001-07-31 with total page 153 pages. Available in PDF, EPUB and Kindle. Book excerpt: This book, featuring the most comprehensive treatment of Josephson junctions ever published, describes superconductor/two-dimensional-electron-gas (2DEG) structures, providing a better understanding of their transport properties. It also discusses the control of junctions using gate electrodes or injection currents, and the physical effects observed in these junctions.

Download or read book Toward The Controllable Quantum States Mesoscopic Superconductivity And Spintronics written by Hideaki Takayanagi and published by World Scientific. This book was released on 2003-03-19 with total page 547 pages. Available in PDF, EPUB and Kindle. Book excerpt: The realizations of physical systems whose quantum states can be directly manipulated have been pursued for experiments on fundamental problems in quantum mechanics and implementations of quantum information devices. Micro-fabricated superconducting systems and electronic spins are among the most promising candidates. This book contains the newest and most advanced research reports on such materials, called “Mesoscopic Superconductivity” and “Spintronics”. The former includes superconductor-semiconductor hybrid systems, very small Josephson junctions, and micron-size SQUIDs. The latter includes the control of spin transports in semiconductor heterostructures, nano-scale quantum dots, and spin injections. Superconductor-ferromagnetic metal hybrid structures are covered by both of the topics.The proceedings have been selected for coverage in:• Index to Scientific & Technical Proceedings (ISTP CDROM version / ISI Proceedings)

Download or read book Magnetic And Superconducting Materials In 2 Vols Procs Of The First Regional Conference written by M Akhavan and published by World Scientific. This book was released on 2000-09-27 with total page 1203 pages. Available in PDF, EPUB and Kindle. Book excerpt: The great breakthroughs in the science and technology of superconducting and magnetic materials in recent years promoted many outstanding representatives of various scientific disciplines (physics, chemistry and materials science) to present their latest findings in a scientific atmosphere of the highest standard at the MSM-99 conference. Over 200 eminent scientists from 50 countries gathered to discuss the physics, materials science and application of magnetic and superconducting materials, and to foster research and development collaborations between the scientists and technologists of the regional countries and also with the international scientific community.The main topics of this book are the physics, materials science and application of magnetic and superconducting materials having a close relationship between the strong correlated electron system and magnetism.

Download or read book Controllable Quantum States Mesoscopic Superconductivity And Spintronics Ms s2006 Proceedings Of The International Symposium written by Hideaki Takayanagi and published by World Scientific. This book was released on 2008-10-03 with total page 433 pages. Available in PDF, EPUB and Kindle. Book excerpt: This volume is a collection of papers from the fourth meeting of the International Symposium on Mesoscopic Superconductivity and Spintronics held at NTT Atsugi, Japan. Research in these fields has advanced a great deal since the previous meeting, largely because these fields have drawn much attention from the viewpoint of new quantum phenomena and quantum information technology. Mesoscopic superconductivity has been developed in new fields, such as a ferromagnet/superconductor junction, the proximity effect in unconventional superconductors, macroscopic quantum tunneling in high-Tc superconductors, quantum modulation of superconducting junctions and superconducting quantum bits. The book also covers transport and spins in nano-scale semiconductor structures such as quantum dots and wires, quantum interference and coherence and order in exotic materials, and some papers on quantum algorithm. This book adequately provides an overview of recent progress in mesoscopic superconductivity.

Download or read book Science and Technology of Mesoscopic Structures written by Susumu Namba and published by Springer Science & Business Media. This book was released on 2013-06-29 with total page 477 pages. Available in PDF, EPUB and Kindle. Book excerpt: The International Symposium on the Science and Technology of Mesoscopic Structures was held at Shin-Kohkaido in Nara from November 6-8, 1991. The symposium was sponsored by the International Institute for Advanced Study and partly by Nara Prefecture, Nara City, Nara Convention Bureau, and the Ministry of Education, Science and Culture of Japan, as well as industrial organizations. We would like to acknowledge the support of the symposium by these or ganizations. The scope of the symposium was planned by the organizing committee to cover outstanding contributors in the fields of (1) ballistic transport, (2) electron wave guides and interference effects, (3) quantum confinement effects, (4) tunneling phenomena, (5) optical nonlinearity, and (6) fabrication technology of meso scopic structures. Twenty-six invited speakers were selected from the United States, Europe, and Japan. In addition twenty-four contributed papers were accepted for presentation at the poster session. These papers are included in the proceedings. We are grateful to the organizing committee, Ms. Y oshiko Kusaki of the Inter national Institute for Advanced Study for the secretarial service, and Dr. Nobuya Mori, Osaka University, for his scientific cooperation. Thanks are also due to the authors and the participants for their contributions to a successful symposium.

Download or read book Superconductor Semiconductor Junctions written by Thomas Schäpers and published by Springer. This book was released on 2003-07-01 with total page 153 pages. Available in PDF, EPUB and Kindle. Book excerpt: This book, featuring the most comprehensive treatment of Josephson junctions ever published, describes superconductor/two-dimensional-electron-gas (2DEG) structures, providing a better understanding of their transport properties. It also discusses the control of junctions using gate electrodes or injection currents, and the physical effects observed in these junctions.

Download or read book Quantum Mesoscopic Phenomena and Mesoscopic Devices in Microelectronics written by Igor O. Kulik and published by Springer Science & Business Media. This book was released on 2012-12-06 with total page 500 pages. Available in PDF, EPUB and Kindle. Book excerpt: Quantum mechanical laws are well documented at the level of a single or a few atoms and are here extended to systems containing 102 to 1010 electrons - still much smaller than the usual macroscopic objects, but behaving in a manner similar to a single atom. Besides the purely theoretical interest, such systems pose a challenge to the achievement of the ultimate microelectronic applications. The present volume presents an up-to-date account of the physics, technology and expected applications of quantum effects in solid-state mesoscopic structures. Physical phenomena include the Aharonov-Bohm effect, persistent currents, Coulomb blockade and Coulomb oscillations in single electron devices, Andreev reflections and the Josephson effect in superconductor/normal/superconductor systems, shot noise suppression in microcontacts and contact resistance quantisation, and overall quantum coherence in mesoscopic and nanoscopic structures related to the emerging physics of quantum computation in the solid-state environment.

Download or read book Nonequilibrium Dynamics in Mesoscopic Superconductor semiconductor superconductor Junctions written by Konrad W. Lehnert and published by . This book was released on 1999 with total page 172 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Physics and Applications of Mesoscopic Josephson Junctions written by Hiroshi Ohta and published by . This book was released on 1999 with total page 344 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Single Electron Tunneling and Mesoscopic Devices written by K.v. Klitzing and published by Springer Science & Business Media. This book was released on 2012-12-06 with total page 298 pages. Available in PDF, EPUB and Kindle. Book excerpt: Single-electron tunneling (SET) and related phenomena have recently come to be considered as "hot topics". This also became apparent when we organized the 4th International Conference on Superconducting and Quantum Effect Devices and Their Applications, SQUID'91, which was held June 18-21, 1991, in Berlin, Germany. Impressed by the number of contributions dedicated to the new physics of ultrasmall devices, we deemed it appropriate to devote this volume of the Springer Series in Electronics and Photonics to these specialized proceedings. The other contributions presented at SQUID'91, which are more conventional in character but nevertheless contain excitingly innovative results, are published separately as Volume 64 of the series Springer Proceedings in Physics. At first glance it seems strange that a conference abbreviated SQUID'91 should attract so many papers on non-superconducting devices, and in fact the first SQUID'XX conferences dealt exclusively with the physics and technology of Josephson junctions, SQUIDs and other superconducting devices and their ap plications. However, many concepts developed for superconducting devices, like tunneling, flux quantization, and flux-charge conjugation, appeared to be suitable for ultrasmall non-superconducting structures as well, and many researchers in the field of superconducting devices extended their activities accordingly. Thus the extension of the conference programme evolved quite informally. Meanwhile, the meetings established themselves as well-known conference series tradition ally appreciated by the SQUID community for its balanced mixture of physics and technology, review and preview. SQUID'XX became a kind of a trademark.

Download or read book Induced Superconductivity in Two Dimensional Electron Gas System written by Zhong Wan and published by . This book was released on 2018 with total page 0 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book The Oxford Handbook of Small Superconductors written by A. V. Narlikar and published by Oxford University Press. This book was released on 2017 with total page 641 pages. Available in PDF, EPUB and Kindle. Book excerpt: Mesoscopic superconductors achieve a level of smallness that reveals the dominance of strange quantum effects. In a world driven by the miniaturization of electronic device technology, small superconductors acquire great relevance and timeliness for the development of ground breaking novel quantum devices.

Download or read book Selected Works of Professor Herbert Kroemer written by C. K. Maiti and published by World Scientific. This book was released on 2008 with total page 385 pages. Available in PDF, EPUB and Kindle. Book excerpt: Information technology has changed our society radically. Just as the integrated circuits have been the prime mover for electronics, high-speed transistors and semiconductor lasers based on heterostructures are now playing the same role in modern telecommunications. Professor Kroemer's conceptual work on heterostructures began in the early 1950s as he was looking for a way to improve transistor speed and performance. In the 1960s, he applied the same principles to the development of lasers and light-emitting diodes, showing that they could achieve continuous operation at room temperature OCo something thought impossible at that time. His deep fundamental scientific work has had a profound effect on technology and society, transforming and improving our lives.This reprint collection brings together Professor Kroemer's most important papers, presenting a comprehensive perspective of the field. It covers topics ranging from substrate materials, electronic properties, process technology, and devices, to circuits and applications. This reprint collection will help the reader identify the key stages in the development of heterostructure devices and lasers from early research through to its integration in current manufacturing. Devoted to R&D engineers and scientists who are actively involved in extending the nano- and microelectronics roadmap mainly via heterostructure engineering, this volume may also serve as a reference for postgraduate and research students."

Download or read book Nanostructures and Mesoscopic systems written by Wiley Kirk and published by Academic Press. This book was released on 2012-12-02 with total page 566 pages. Available in PDF, EPUB and Kindle. Book excerpt: Nanostructures and Mesoscopic Systems presents the proceedings of the International Symposium held in Santa Fe, New Mexico on May 20-24, 1991. The book discusses nanostructure physics; nanostructures in motion; and advances in nanostructure fabrication. The text also describes ballistic transport and coherence; low-dimensional tunneling; and electron correlation and coulomb blockade. Banostructure arrays and collective effects; the theory and modeling of nanostructures; and mesoscopic systems are also encompassed. The book further tackles the optical properties of nanostructures.

Download or read book Quantum Computation and Quantum Information Theory written by Anton Zeilinger and published by World Scientific. This book was released on 2000 with total page 540 pages. Available in PDF, EPUB and Kindle. Book excerpt: Quantum information theory has revolutionised our view on the true nature of information and has led to such intriguing topics as teleportation and quantum computation. The field - by its very nature strongly interdisciplinary, with deep roots in the foundations both of quantum mechanics and of information theory and computer science - has become a major subject for scientists working in fields as diverse as quantum optics, superconductivity or information theory, all the way to computer engineers.