Study Of Electronic Properties Of 122 Iron Pnictide Through Structural Carrier Doping And Impurity Scattering Effects
DOWNLOAD
Download Study Of Electronic Properties Of 122 Iron Pnictide Through Structural Carrier Doping And Impurity Scattering Effects PDF/ePub or read online books in Mobi eBooks. Click Download or Read Online button to get Study Of Electronic Properties Of 122 Iron Pnictide Through Structural Carrier Doping And Impurity Scattering Effects book now. This website allows unlimited access to, at the time of writing, more than 1.5 million titles, including hundreds of thousands of titles in various foreign languages. If the content not found or just blank you must refresh this page
Study Of Electronic Properties Of 122 Iron Pnictide Through Structural Carrier Doping And Impurity Scattering Effects
DOWNLOAD
Author : Tatsuya Kobayashi
language : en
Publisher: Springer
Release Date : 2017-05-07
Study Of Electronic Properties Of 122 Iron Pnictide Through Structural Carrier Doping And Impurity Scattering Effects written by Tatsuya Kobayashi and has been published by Springer this book supported file pdf, txt, epub, kindle and other format this book has been release on 2017-05-07 with Technology & Engineering categories.
This thesis presents various characteristics of 122-type iron pnictide (FeSC) such as crystal and electronic structure, carrier-doping effect, and impurity-scattering effect, using transport, magnetization, specific heat, single-crystal X-ray diffraction, and optical spectral measurements. Most notably the measurement on the magnetic fluctuation in the material successfully explains already known unusual electronic properties, i.e., superconducting gap symmetry, anisotropy of in-plane resistivity in layered structure, and charge dynamics; and comparing them with those of normal phase, the controversial problems in FeSCs are eventually settled. The thesis provides broad coverage of the physics of FeSCs both in the normal and superconducting phase, and readers therefore benefit from the efficient up-to-date study of FeSCs in this thesis. An additional attraction is the detailed description of the experimental result critical for the controversial problems remaining since the discovery of FeSC in 2008, which helps readers follow up recent developments in superconductor research.
Iron Based Superconductivity
DOWNLOAD
Author : Peter D. Johnson
language : en
Publisher: Springer
Release Date : 2015-01-06
Iron Based Superconductivity written by Peter D. Johnson and has been published by Springer this book supported file pdf, txt, epub, kindle and other format this book has been release on 2015-01-06 with Technology & Engineering categories.
This volume presents an in-depth review of experimental and theoretical studies on the newly discovered Fe-based superconductors. Following the Introduction, which places iron-based superconductors in the context of other unconventional superconductors, the book is divided into three sections covering sample growth, experimental characterization, and theoretical understanding. To understand the complex structure-property relationships of these materials, results from a wide range of experimental techniques and theoretical approaches are described that probe the electronic and magnetic properties and offer insight into either itinerant or localized electronic states. The extensive reference lists provide a bridge to further reading. Iron-Based Superconductivity is essential reading for advanced undergraduate and graduate students as well as researchers active in the fields of condensed matter physics and materials science in general, particularly those with an interest in correlated metals, frustrated spin systems, superconductivity, and competing orders.
Journal Of The Physical Society Of Japan
DOWNLOAD
Author :
language : en
Publisher:
Release Date : 2016
Journal Of The Physical Society Of Japan written by and has been published by this book supported file pdf, txt, epub, kindle and other format this book has been release on 2016 with Physics categories.
Charge Dynamics In The Metallic And Superconducting States Of The Electron Doped 122 Type Iron Arsenides
DOWNLOAD
Author : Zhen Xing
language : en
Publisher:
Release Date : 2018
Charge Dynamics In The Metallic And Superconducting States Of The Electron Doped 122 Type Iron Arsenides written by Zhen Xing and has been published by this book supported file pdf, txt, epub, kindle and other format this book has been release on 2018 with Condensed matter categories.
Understanding charge dynamics and the origin of superconductivity in iron-based materials is one of the most important topics in condensed matter physics. Among different structures of iron-based materials, 122-type iron arsenides are of considerable interest due to their diverse phase diagrams, relatively high superconducting transition temperatures, and the availability of high quality single crystals. In this dissertation, we study temperature and frequency dependence of charge dynamics of the electron-doped 122-type iron arsenides in the metallic and superconducting states using broadband infrared spectroscopy at cryogenic temperatures. We have investigated the charge dynamics and the nature of many-body interactions in metallic La- and Pr- doped CaFe2As2. From the infrared part of the optical conductivity, we discover that the scattering rate of mobile carriers above 200 K exhibits saturation at the Mott-Ioffe-Regel limit of metallic transport. However, the dc resistivity continues to increase with temperature above 200 K due to the loss of Drude spectral weight. The loss of Drude spectral weight with increasing temperature is seen in a wide temperature range in the uncollapsed tetragonal phase, and this spectral weight is recovered at energy scales about one order of magnitude larger than the Fermi energy scale in these semimetals. The phenomena noted above have been observed previously in other correlated metals in which the dominant interactions are electronic in origin. Further evidence of significant electron-electron interactions is obtained from the presence of quadratic temperature and frequency-dependence scattering rate at low temperatures and frequencies in the uncollapsed tetragonal structures of La- and Pr-doped CaFe2As2. We also observe weakening of electronic correlations and a decrease of Drude spectral weight upon the transition to the collapsed tetragonal phase in Pr-doped CaFe2As2. We have measured infrared reflectance spectra of BaFe1.9Pt0.1As2 in the normal and superconducting states. We find that this superconductor has fully gapped Fermi surfaces. Importantly, we observe strong-coupling electron-boson interaction features in the infrared absorption spectra. By using two modeling methods which include strong-coupling effects via the Eliashberg function, we obtain a good quantitative description of the energy gaps and the temperature dependent strong-coupling features. Our experimental data and analysis provide compelling evidence that superconductivity in BaFe1.9Pt0.1As2 is induced by the coupling of electrons to a low energy bosonic mode.
Study Of Doping Phenomena In Functional Materials
DOWNLOAD
Author : Shiny Mathew
language : en
Publisher:
Release Date : 2020
Study Of Doping Phenomena In Functional Materials written by Shiny Mathew and has been published by this book supported file pdf, txt, epub, kindle and other format this book has been release on 2020 with categories.
Effects Of Structure And Doping On The Electronic Properties Of La2 Cuo4 And Nd2 Cuo4
DOWNLOAD
Author : Z. Szotek
language : en
Publisher:
Release Date : 1989
Effects Of Structure And Doping On The Electronic Properties Of La2 Cuo4 And Nd2 Cuo4 written by Z. Szotek and has been published by this book supported file pdf, txt, epub, kindle and other format this book has been release on 1989 with Electron spectroscopy categories.
Isotropic In Plane Quenched Disorder And Dilution Induce A Robust Nematic State In Electron Doped Pnictides
DOWNLOAD
Author :
language : en
Publisher:
Release Date : 2015
Isotropic In Plane Quenched Disorder And Dilution Induce A Robust Nematic State In Electron Doped Pnictides written by and has been published by this book supported file pdf, txt, epub, kindle and other format this book has been release on 2015 with categories.
The phase diagram of electron-doped pnictides is studied varying the temperature, electronic density, and isotropic in-plane quenched disorder strength and dilution by means of computational techniques applied to a three-orbital (xz, yz, xy) spin-fermion model with lattice degrees of freedom. In experiments, chemical doping introduces disorder but in theoretical studies the relationship between electronic doping and the randomly located dopants, with their associated quenched disorder, is difficult to address. Moreover, in this publication, the use of computational techniques allows us to study independently the effects of electronic doping, regulated by a global chemical potential, and impurity disorder at randomly selected sites. Surprisingly, our Monte Carlo simulations reveal that the fast reduction with doping of the N eel TN and the structural TS transition temperatures, and the concomitant stabilization of a robust nematic state, is primarily controlled in our model by the magnetic dilution associated with the in-plane isotropic disorder introduced by Fe substitution. In the doping range studied, changes in the Fermi surface produced by electron doping affect only slightly both critical temperatures. Our results also suggest that the specific material-dependent phase diagrams experimentally observed could be explained as a consequence of the variation in disorder profiles introduced by the different dopants. Finally, our findings are also compatible with neutron scattering and scanning tunneling microscopy, unveiling a patchy network of locally magnetically ordered clusters with anisotropic shapes, even though the quenched disorder is locally isotropic. Our study reveals a remarkable and unexpected degree of complexity in pnictides: the fragile tendency to nematicity intrinsic of translational invariant electronic systems needs to be supplemented by quenched disorder and dilution to stabilize the robust nematic phase experimentally found in electron-doped 122 compounds.
Spectroscopy Of Complex Oxide Interfaces
DOWNLOAD
Author : Claudia Cancellieri
language : en
Publisher: Springer
Release Date : 2018-04-09
Spectroscopy Of Complex Oxide Interfaces written by Claudia Cancellieri and has been published by Springer this book supported file pdf, txt, epub, kindle and other format this book has been release on 2018-04-09 with Technology & Engineering categories.
This book summarizes the most recent and compelling experimental results for complex oxide interfaces. The results of this book were obtained with the cutting-edge photoemission technique at highest energy resolution. Due to their fascinating properties for new-generation electronic devices and the challenge of investigating buried regions, the book chiefly focuses on complex oxide interfaces. The crucial feature of exploring buried interfaces is the use of soft X-ray angle-resolved photoemission spectroscopy (ARPES) operating on the energy range of a few hundred eV to increase the photoelectron mean free path, enabling the photons to penetrate through the top layers – in contrast to conventional ultraviolet (UV)-ARPES techniques. The results presented here, achieved by different research groups around the world, are summarized in a clearly structured way and discussed in comparison with other photoemission spectroscopy techniques and other oxide materials. They are complemented and supported by the most recent theoretical calculations as well as results of complementary experimental techniques including electron transport and inelastic resonant X-ray scattering.
Electrodynamics Of Solids
DOWNLOAD
Author : Martin Dressel
language : en
Publisher: Cambridge University Press
Release Date : 2002-01-17
Electrodynamics Of Solids written by Martin Dressel and has been published by Cambridge University Press this book supported file pdf, txt, epub, kindle and other format this book has been release on 2002-01-17 with Science categories.
The authors of this book present a thorough discussion of the optical properties of solids, with a focus on electron states and their response to electrodynamic fields. A review of the fundamental aspects of the propagation of electromagnetic fields, and their interaction with condensed matter, is given. This is followed by a discussion of the optical properties of metals, semiconductors, and collective states of solids such as superconductors. Theoretical concepts, measurement techniques and experimental results are covered in three interrelated sections. Well-established, mature fields are discussed (for example, classical metals and semiconductors) together with modern topics at the focus of current interest. The substantial reference list included will also prove to be a valuable resource for those interested in the electronic properties of solids. The book is intended for use by advanced undergraduate and graduate students, and researchers active in the fields of condensed matter physics, materials science and optical engineering.
Electronic Properties Of Materials
DOWNLOAD
Author : Rolf E. Hummel
language : en
Publisher: Springer Science & Business Media
Release Date : 2013-04-17
Electronic Properties Of Materials written by Rolf E. Hummel and has been published by Springer Science & Business Media this book supported file pdf, txt, epub, kindle and other format this book has been release on 2013-04-17 with Technology & Engineering categories.
The present book on electrical, optical, magnetic and thermal properties of materials is in many aspects different from other introductory texts in solid state physics. First of all, this book is written for engineers, particularly materials and electrical engineers who want to gain a fundamental under standing of semiconductor devices, magnetic materials, lasers, alloys, etc. Second, it stresses concepts rather than mathematical formalism, which should make the presentation relatively easy to understand. Thus, this book provides a thorough preparation for advanced texts, monographs, or special ized journal articles. Third, this book is not an encyclopedia. The selection oftopics is restricted to material which is considered to be essential and which can be covered in a 15-week semester course. For those professors who want to teach a two-semester course, supplemental topics can be found which deepen the understanding. (These sections are marked by an asterisk [*]. ) Fourth, the present text leaves the teaching of crystallography, X-ray diffrac tion, diffusion, lattice defects, etc. , to those courses which specialize in these subjects. As a rule, engineering students learn this material at the beginning of their upper division curriculum. The reader is, however, reminded of some of these topics whenever the need arises. Fifth, this book is distinctly divided into five self-contained parts which may be read independently.