Gap symmetry and charge density excitations in high-Tc superconductors with extended saddle points in electron spectrum

• Published in: Condensed Matter Physics
• Date: 1999
• Main Authors: Pashitskii, E.A., Pentegov, V.I., Semenov, A.V.
• Format: Article
• Language: English
• Published: Інститут фізики конденсованих систем НАН України 1999
• Online Access: https://nasplib.isofts.kiev.ua/handle/123456789/120526
• Journal Title: Digital Library of Periodicals of National Academy of Sciences of Ukraine
• Cite this: Gap symmetry and charge density excitations in high-Tc superconductors with extended saddle points in electron spectrum / E.A. Pashitskii, V.I. Pentegov, A.V. Semenov // Condensed Matter Physics. — 1999. — Т. 2, № 3(19). — С. 453-462. — Бібліогр.: 13 назв. — англ.

It is shown that the strong anisotropy of the one-particle electron spectrum, due to the presence of extended saddle-point features (ESPF) close to the Fermi level in the hole-type cuprates YBCO and BSCCO, leads to the occurrence of a low-frequency peak in the spectral function of the charge dens...