EVIDENCE OF PSEUDOGAP RELATED CORE-LEVEL SHIFTS IN BI2SR2CA1-XYXCU2O8+DELTA

Authors
TJERNBERG O NYLEN H CHIAIA G SODERHOLM S KARLSSON UO QVARFORD M LINDAU I PUGLIA C MARTENSSON N LEONYUK L
Citation
O. Tjernberg et al., EVIDENCE OF PSEUDOGAP RELATED CORE-LEVEL SHIFTS IN BI2SR2CA1-XYXCU2O8+DELTA, Physical review letters, 79(3), 1997, pp. 499-502
Citations number
22
Categorie Soggetti
Physics
Journal title
Physical review letters → ACNP
ISSN journal
00319007
Volume
79
Issue
3
Year of publication
1997
Pages
499 - 502
Database
ISI
SICI code
0031-9007(1997)79:3<499:EOPRCS>2.0.ZU;2-D
Abstract
Photoelectron spectroscopy data from Bi2Sr2Ca1-xYxCu2O8+delta Single c rystals, for x = 0, 0.16, and 0.55, are presented. It is shown that th ere are core level shifts related to the opening of a pseudogap and th at similar shifts are observed at the opening of the superconducting g ap in optimally doped samples. This result is in agreement with pair f ormation above T-c as suggested by V.J. Emery and S.A. Kivelson [Natur e (London) 374, 434 (1995)].