Overview

The objective of this book is to provide an up-to-date comprehensive descr- tion of the Kamimura-Suwa model, which is the ?rst of the present rep- sentative two-component theories in high temperature superconductivity. In 1986 George Bednorz and Karl Alex Muller .. made the remarkable discovery ofsuperconductivitywithanunbelievinglyhighvalueofT = 35K,bysubs- c 2+ 3+ tuting Ba ions for La ions in the antiferromagnetic insulator La CuO . 2 4 Soon after this discoveryT rose to 90K by synthesizing YBa Cu O with c 2 3 7?? ade?citinoxygen. Furtherexplorationfornewcopperoxidesuperconducting materials with higherT led to the discovery of Bi-Sr-Ca-Cu-O, Tl-Ba-Ca- c Cu-O and Hg-Ba-Ca-Cu-O compounds in subsequent years. The new class of copper oxide compounds mentioned above is called ""cuprates"". At present T = 135K under ambient pressure andT = 164K under 31 GPa observed c c in HgBa Ca Cu O are the highest value so far obtained. The Kamimura- 2 2 3 8 Suwa model, which was originally developed in 1993, is a theory of these real copper oxide superconducting materials. Since undoped La CuO is a 2 4 Mott-Hubbard antiferromagnetic insulator, its electronic structure can not beexplained bytheordinaryone-electron energybandtheory. Inthiscontext the important role of electron-correlation was pointed out. 2+ On theother hand, ad-hole state in each Cu ion in theligand ?eld with octahedral symmetry is orbitally doubly-degenerate so that it is subject to strong Jahn-Teller interaction in La CuO. Asaresult,aCuO octahedron 2 4 6 in La CuO is elongated along thec-axis due to the Jahn-Teller distortion.

Full Product Details

Author:   Hiroshi Kamimura ,  Hideki Ushio ,  Shunichi Matsuno ,  Tsuyoshi Hamada
Publisher:   Springer-Verlag Berlin and Heidelberg GmbH & Co. KG
Imprint:   Springer-Verlag Berlin and Heidelberg GmbH & Co. K
Edition:   2005 ed.
Dimensions:   Width: 15.50cm , Height: 1.40cm , Length: 23.50cm
Weight:   0.554kg
ISBN:  

9783540251897

ISBN 10:   3540251898
Pages:   214
Publication Date:   06 May 2005
Audience:   Professional and scholarly ,  Professional & Vocational
Format:   Hardback
Publisher's Status:   Active
Availability:   Out of stock  
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Table of Contents

Experimental Results of High Temperature Superconducting Cuprates.- Brief Review of Models of High-Temperature Superconducting Cuprates.- Cluster Models for Hole-Doped CuO6 Octahedron and CuO5 Pyramid.- MCSCF-CI Method: Its Application to a CuO6 Octahedron Embedded in LSCO.- Calculated Results of a Hole-Doped CuO5 Pyramid in YBa2Cu3O7??.- Electronic Structure of a CuO5 Pyramid in Bi2Sr2CaCu2O8+?.- The Kamimura—Suwa (K-S) Model: Electronic Structure of Underdoped Cuprates.- Exact Diagonalization Method to Solve the K—S Hamiltonian.- Mean-Field Approximation for the K—S Hamiltonian.- Calculated Results of Many-Electrons Band Structures and Fermi Surfaces.- Normal State Properties of La2?xSrxCuO4.- Electron—Phonon Interaction and Electron—Phonon Spectral Functions.- Mechanism of High Temperature Superconductivity.

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