Electronic Structure and Fermiology of High-T_{c} Superconductors

• Authors: A. Bansil , S. Kaprzyk
• Languages of publication: EN

Abstracts

EN

We briefly discuss some of our recent results in three areas, all related to issues concerning the electronic structure and fermiology of the high-T_{c}'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 YBa_{2}Cu_{3}O_{7} are discussed. (ii) Another k-resolved spectroscopy where such first-principles comparisons between the computed and measured spectral intensities have been crucially important is the angle-resolved photoemission experiment; we discuss results for the (001)-surface of YBa_{2}Cu_{3}O_{7} where computations yield considerable insight into the nature and origin of the spectral signal associated with the CuO_{2} plane bands. (iii) The study of effects of substitutions and of oxygen-vacancy disorder in the high-T_{c}'s; here results for the LaSrCuO_{4}, and Ba-K-Bi-O and Ba-Pb-Bi-O systems, with focus on the nature of the van Hove singularity in the vicinity of the Fermi energy are presented.

Keywords

EN

71.25.-s; 74.20.Mn; 74.25.Jb

Discipline

• 74.20.Mn: Nonconventional mechanisms
• 74.25.Jb: Electronic structure (photoemission, etc.)

• Publisher: Institute of Physics, Polish Academy of Sciences
• Journal: Acta Physica Polonica A
• Year: 1993
• Volume: 84
• Issue: 1
• Pages: 7-20

Dates

published

1993-07

Contributors

author

A. Bansil

• Department of Physics, Northeastern University, Boston, MA 02115, USA

author

S. Kaprzyk

• Institute of Physics and Nuclear Techniques, AGH, Al. Mickiewicza 30, 30-059 Kraków, Poland

Identifiers

DOI

10.12693/APhysPolA.84.7