Electronic structure and Fermiology of high-Tc superconductors [chapter]

A. Bansil
1994 Advanced Materials '93  
We briefly discuss some of our recent results in three areas, all related to issues concerning the electronic structure and fermiology of the high-Tc's. (i) First-principles band theory based computations of the electron-positron momentum density relevant for the interpretation of the positron annihilation (2D-ACAR) experiments; results for YBa2Cu3O7 are discussed. (ii) Another k-resolved spectroscopy where such first-principles comparisons between the computed and measured spectral intensities
more » ... pectral intensities have been crucially important is the angle-resolved photoemission experiment; we discuss results for the (001)-surface of YBa2Cu3O7 where computations yield considerable insight into the nature and origin of the spectral signal . associated with the CuO2 plane bands. (iii) The study of effects of substitutions and of oxygen-vacancy disorder in the high-Tc's; here results for the LaSrCuO4, and Ba-K-Bi-O and Ba-Pb-Bi-O systems, with focus on the nature of the van Bove singularity in the vicinity of the Fermi energy are presented.
doi:10.1016/b978-0-444-81993-2.50061-5 fatcat:xgmfup4bijemxfrwxmazriisfi