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Thermal Transport in Strongly Correlated Electron Systems

Thermal Transport in Strongly Correlated Electron Systems
Author:
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Total Pages:
Release: 2005
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Thermal conductivity and thermopower measurements in strongly correlated electron systems at low temperatures.


Transport and Thermal Properties of f-Electron Systems

Transport and Thermal Properties of f-Electron Systems
Author: H. Fujii
Publisher: Springer Science & Business Media
Total Pages: 304
Release: 2012-12-06
Genre: Science
ISBN: 1461528682

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The Hiroshima Workshop on Transport and Thermal Properties of f-Electron Systems, T2PfS, was held in the hotel Greenpia Yasuura on the shores of the Seto Inland Sea near Hiroshima, Japan from August 30, to September 2, 1992, as a satellite meeting of the International Conference of Strongly Correlated Electron Systems in Sendai. The purpose of this workshop was to bring together those scientists who are actively involved in the research of 4f- and 5f-electron systems; particularly the transport and thermal properties such as electrical resistivity, Hall effect, thermoelectric power, thermal conductivity, thermal expansion and specific heat. Hence, the organizing committee limited the number of participants to 60; 25 from abroad and 35 from Japan. In the workshop, all the sessions consisted of oral presentations; 25 invited talks and 5 contributed talks, including at least 10 minutes of discussion for each presentation. The program was divided into the following five topics: [1] Kondo-lattice semiconductors, [2] superconductivity of f-electron systems, [3] anomalous transport and thermal properties of 4f- and 5f-compounds, [4] low-carrier heavy-electron systems and [5] theoretical investigation of heavy-electron and mixed-valence states. This division of topics has been retained in the organization of papers in this volume. Almost all of the invited and contributed papers are included. These papers include excellent reviews of both the recent advances and historical background of each topic. We believe this book would be a tutorial text for researchers working in the field of solid state physics.


Thermal Transport in Strongly Correlated Rare-Earth Intermetallic Compounds

Thermal Transport in Strongly Correlated Rare-Earth Intermetallic Compounds
Author: Heike Pfau
Publisher: Springer
Total Pages: 133
Release: 2016-07-20
Genre: Technology & Engineering
ISBN: 3319395432

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This thesis explores thermal transport in selected rare-earth-based intermetallic compounds to answer questions of great current interest. It also sheds light on the interplay of Kondo physics and Fermi surface changes. By performing thermal conductivity and electrical resistivity measurements at temperatures as low as 25mK, the author demonstrates that the Wiedemann–Franz law, a cornerstone of metal physics, is violated at precisely the magnetic-field-induced quantum critical point of the heavy-fermion metal YbRh2Si2. This first-ever observation of a violation has dramatic consequences, as it implies a breakdown of the quasiparticle picture. Utilizing an innovative technique to measure low-temperature thermal transport isothermally as a function of the magnetic field, the thesis interprets specific, partly newly discovered, high-field transitions in CeRu2Si2 and YbRh2Si2 as Lifshitz transitions related to a change in the Fermi surface. Lastly, by applying this new technique to thermal conductivity measurements of the skutterudite superconductor LaPt4Ge12, the thesis proves that the system is a conventional superconductor with a single energy gap. Thus, it refutes the widespread speculations about unconventional Cooper pairing in this material.


Electron Correlation in Metals

Electron Correlation in Metals
Author: K. Yamada
Publisher: Cambridge University Press
Total Pages: 257
Release: 2010-06-24
Genre: Science
ISBN: 1139453068

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Since the discovery of high Tc superconductivity, the role of electron correlation on superconductivity has been an important issue in condensed matter physics. Here the role of electron correlation in metals is explained in detail on the basis of the Fermi liquid theory. The book, originally published in 2004, discusses the following issues: enhancements of electronic specific heat and magnetic susceptibility, effects of electron correlation on transport phenomena such as electric resistivity and Hall coefficient, magnetism, Mott transition and unconventional superconductivity. These originate commonly from the Coulomb repulsion between electrons. In particular, superconductivity in strongly correlated electron systems is discussed with a unified point of view. This book is written to explain interesting physics in metals for undergraduate and graduate students and researchers in condensed matter physics.


Lectures on the Physics of Highly Correlated Electron Systems VI

Lectures on the Physics of Highly Correlated Electron Systems VI
Author: Ferdinando Mancini
Publisher: American Inst. of Physics
Total Pages: 260
Release: 2002-10-08
Genre: Science
ISBN: 9780735400832

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This volume contains the lectures and participant contributions delivered at the Sixth Training Course in the Physics of Correlated Electron Systems and High-Tc Superconductors. Different from usual workshops, this course was designed to promote active participation of senior and young researchers and to introduce them to some specific problems. Lecture topics include: Introduction to Renormalization Group and Ward Identities in Critical Phenomena and in Fermi and Bose Liquids; Local Moment Physics in Heavy Electron Systems; and Transport of Strongly Correlated Electrons. Other contributions include: Theoretical de Haas-van Alphen Data and Plasma Frequencies of MgB2 and TaB2; Magnetic and Orbital Ordering in Doped Manganites; A Combined Exact Diagonalization - ab initio Study of the Metallicity and Electron Localization in Nanoscopic Systems; A New Spinwave Expansion for the Ordered Kondo Lattice; and The Novel Superconducting Clathrates.


Transport Phenomena in Strongly Correlated Fermi Liquids

Transport Phenomena in Strongly Correlated Fermi Liquids
Author: Hiroshi Kontani
Publisher: Springer
Total Pages: 173
Release: 2013-02-12
Genre: Science
ISBN: 9783642353666

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In conventional metals, various transport coefficients are scaled according to the quasiparticle relaxation time, \tau, which implies that the relaxation time approximation (RTA) holds well. However, such a simple scaling does not hold in many strongly correlated electron systems, reflecting their unique electronic states. The most famous example would be cuprate high-Tc superconductors (HTSCs), where almost all the transport coefficients exhibit a significant deviation from the RTA results. To better understand the origin of this discrepancy, we develop a method for calculating various transport coefficients beyond the RTA by employing field theoretical techniques. Near the magnetic quantum critical point, the current vertex correction (CVC), which describes the electron-electron scattering beyond the relaxation time approximation, gives rise to various anomalous transport phenomena. We explain anomalous transport phenomena in cuprate HTSCs and other metals near their magnetic or orbital quantum critical point using a uniform approach. We also discuss spin related transport phenomena in strongly correlated systems. In many d- and f-electron systems, the spin current induced by the spin Hall effect is considerably greater because of the orbital degrees of freedom. This fact attracts much attention due to its potential application in spintronics. We discuss various novel charge, spin and heat transport phenomena in strongly correlated metals.