Contribution à l'étude théorique et expérimentale de l'effet tunnel Josephson PDF Download

Author: Gérard Gras
Publisher:
ISBN:
Category :
Languages : fr
Pages : 336

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Author:
Publisher:
ISBN:
Category : Aeronautics
Languages : en
Pages : 804

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Author: Pierre Duclos
Publisher:
ISBN:
Category :
Languages : fr
Pages :

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DANS UN INTERVALLE D'ENERGIE DONNE, LES SOLUTIONS DE L'EQUATION DE SCHRODINGER STATIONNAIRE SE STRUCTURENT EN FONCTION DE L'ORGANISATION DU POTENTIEL EN PUITS ET BARRIERES A CES ENERGIES. CES SOLUTIONS SONT BIEN APPROXIMEES PAR CELLES DE L'EQUATION DE SCHRODINGER RESTREINTE A CHACUN DE CES PUITS. L'ANALYSE SPECTRALE DE CE PROBLEME PEUT DONC ETRE ABORDEE PERTURBATIVEMENT: ON INTRODUIT DES OPERATEURS MODELES, CHACUN D'EUX COINCIDANT AVEC L'OPERATEUR ORIGINAL SUR UN DES PUITS SEULEMENT; PUIS ON COMPARE LE VRAI SPECTRE A LA REUNION DES SPECTRES DE CHACUN DES OPERATEURS A UN PUITS. LA QUALITE DE CETTE APPROXIMATION DEPEND DE LA TAILLE DES BARRIERES DE POTENTIEL DANS UNE METRIQUE DITE D'AGMON. L'INGREDIENT MAJEUR, DANS L'ESTIMATION DE CETTE PERTURBATION, EST L'ESTIMATION DES FONCTIONS DE GREEN ENTRE LES PUITS, DE CHACUN DES OPERATEURS DE SCHRODINGER, MESURANT LA PROBABILITE DE TRANSITION ENTRE CES PUITS, DU SYSTEME ETUDIE. CETTE CAPACITE A TRANSITER ENTRE PUITS DE POTENTIEL A TRAVERS LES BARRIERES DE POTENTIEL EST APPELEE EFFET TUNNEL. ON ABORDE LA GENERALISATION DE CE TYPE D'ANALYSE AU CAS OU LES REGIONS CLASSIQUEMENT PERMISES (PUITS) ET INTERDITES (BARRIERES) SE LISENT DANS L'ESPACE DES PHASES ET NON PLUS DANS L'ESPACE DES CONFIGURATIONS. CE DERNIER PHENOMENE EST APPELE EFFET TUNNEL DYNAMIQUE

Author: Roland Combescot
Publisher:
ISBN:
Category :
Languages : fr
Pages : 104

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Author: George I. Haddad
Publisher: Modern Frontiers in Applied Sc
ISBN:
Category : Science
Languages : en
Pages : 608

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Author: Ahmed Belasri
Publisher: Springer Nature
ISBN: 9811554447
Category : Technology & Engineering
Languages : en
Pages : 659

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This book highlights peer reviewed articles from the 1st International Conference on Renewable Energy and Energy Conversion, ICREEC 2019, held at Oran in Algeria. It presents recent advances, brings together researchers and professionals in the area and presents a platform to exchange ideas and establish opportunities for a sustainable future. Topics covered in this proceedings, but not limited to, are photovoltaic systems, bioenergy, laser and plasma technology, fluid and flow for energy, software for energy and impact of energy on the environment.

Author: P. Misaelides
Publisher: Springer Science & Business Media
ISBN: 9780792333241
Category : Science
Languages : en
Pages : 702

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The development of advanced materials with preselected properties is one of the main goals of materials research. Of especial interest are electronics, high-temperature and superhard materials for various applications, as well as alloys with improved wear, corrosion and mechanical resistance properties. The technical challenge connected with the production of these materials is not only associated with the development of new specialised preparation techniques but also with quality control. The energetic charged particle, electron and photon beams offer the possibility of modifying the properties of the near-surface regions of materials without seriously affecting their bulk, and provide unique analytical tools for testing their quality. Application of Particle and Laser Beams in Materials Technology provides an overview of this rapidly expanding field. Fundamental aspects concerning the interactions and collisions on atomic, nuclear and solid state scale are presented in a didactic way, along with the application of a variety of techniques for the solution of problems ranging from the development of electronics materials to corrosion research and from archaeometry to environmental protection. The book is divided into six thematic units: Fundamentals, Surface Analysis Techniques, Laser Beams in Materials Technology, Accelerator-Based Techniques in Materials Technology, Materials Modification and Synchrotron Radiation.

Author: Frank Pobell
Publisher: Springer Science & Business Media
ISBN: 366208578X
Category : Science
Languages : en
Pages : 328

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The aim of this book is to provide information about performing experi ments at low temperatures, as well as basic facts concerning the low tem perature properties of liquid and solid matter. To orient the reader, I begin with chapters on these low temperature properties. The major part of the book is then devoted to refrigeration techniques and to the physics on which they are based. Of equal importance, of course, are the definition and measurement of temperature; hence low temperature thermometry is extensively discussed in subsequent chapters. Finally, I describe a variety of design and construction techniques which have turned out to be useful over the years. The content of the book is based on the three-hour-per-week lecture course which I have given several times at the University of Bayreuth between 1983 and 1991. It should be particularly suited for advanced stu dents whose intended masters (diploma) or Ph.D. subject is experimental condensed matter physics at low temperatures. However, I believe that the book will also be of value to experienced scientists, since it describes sev eral very recent advances in experimental low temperature physics and technology, for example, new developments in nuclear refrigeration and thermometry.

Author: Ansgar Jüngel
Publisher: Birkhäuser
ISBN: 303488334X
Category : Mathematics
Languages : en
Pages : 301

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This book presents a hierarchy of macroscopic models for semiconductor devices, studying three classes of models in detail: isentropic drift-diffusion equations, energy-transport models, and quantum hydrodynamic equations. The derivation of each, including physical discussions, is shown. Numerical simulations for modern semiconductor devices are performed, showing the particular features of each. The author develops modern analytical techniques, such as positive solution methods, local energy methods for free-boundary problems and entropy methods.

Author: Alina Voda
Publisher: John Wiley & Sons
ISBN: 1118622529
Category : Computers
Languages : en
Pages : 254

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Book Description
Micro- and nanosystems represent an area of major scientific and technological opportunity and challenge, with actual and potential applications in almost all fields of human activity. The aim of this book is to present the central concepts of dynamic control systems (modeling, estimation, observation, identification, feedback control) and to show how they can be adapted and applied to the development of novel very small-scale systems and their associated human interfaces. The application fields presented here come from micro- and nano-robotics, biochips, near-field microscopy (AFM and STM) and nano-systems networks. Alina Voda has assembled contributions from leading experts at top research universities to produce the first overview of the major role that control systems science will play in the development of micro and nano-science and technologies.