Share Email Print
cover

Proceedings Paper

Fermi surface features and charge segregation in Bi2212 superconductor
Author(s): N. L. Saini; A. Lanzara; Antonio Bianconi; J. Avila; M. C. Asensio; Setsuko Tajima; G. D. Gu; N. Koshizuka
Format Member Price Non-Member Price
PDF $14.40 $18.00
cover GOOD NEWS! Your organization subscribes to the SPIE Digital Library. You may be able to download this paper for free. Check Access

Paper Abstract

Experiments are enlightening that the high Tc superconductivity in cuprate perovskites takes place in a particular phase showing segregation of localized and itinerant charge carriers. We have studied topological features of the Fermi surface of Bi2Sr2CaCu2O8+d (Bi2212) superconductor to investigate implication of charge segregation in the system. For the purpose we have used constant initial state angle-scanning photoemission supported by the energy distribution curves. The resulting Fermi surface measured over an extended Brillouin zone shows broken segments with partial gaps around ((pi) ,O) and shadow bands around (0.5(pi) ,0.5(pi) ) and equivalent locations. In addition data provide an evidence for new electronic states at the Fermi surface due to a one dimensional band with a small dispersion and small kF along the ((pi) ,O) direction. We argue that the depression of photointensity around ((pi) ,O) and equivalent locations with well-defined kF and one dimensional band are related with charge ordering in the CuO2 plane along the (-(pi) ,(pi) ) direction and spin fluctuations along the ((pi) ,O) direction.

Paper Details

Date Published: 22 December 1998
PDF: 9 pages
Proc. SPIE 3481, Superconducting and Related Oxides: Physics and Nanoengineering III, (22 December 1998); doi: 10.1117/12.335880
Show Author Affiliations
N. L. Saini, Univ. degli Studi di Roma La Sapienza (Italy)
A. Lanzara, Univ. degli Studi di Roma La Sapienza (Italy)
Antonio Bianconi, Univ. degli Studi di Roma La Sapienza (Italy)
J. Avila, Univ. de Paris-Sud (France) and Instituto de Ciencia de Materiales de Madrid (Spain) (France)
M. C. Asensio, Univ. de Paris-Sud (France) and Instituto de Ciencia de Materiales de Madrid (Spain) (France)
Setsuko Tajima, International Superconductivity Technology Ctr. (Japan)
G. D. Gu, International Superconductivity Technology Ctr. (Japan)
N. Koshizuka, International Superconductivity Technology Ctr. (Japan)


Published in SPIE Proceedings Vol. 3481:
Superconducting and Related Oxides: Physics and Nanoengineering III
Davor Pavuna; Ivan Bozovic, Editor(s)

© SPIE. Terms of Use
Back to Top