Evidence of pseudogap related core level shifts in Bi2Sr2Ca1-xYxCu2O8+delta
1997 (English)In: Physical Review Letters, ISSN 0031-9007, Vol. 79, no 3, 499-502 p.Article in journal (Refereed) Published
Photoelectron spectroscopy data from Bi2Sr2Ca1-xYxCu2O8+delta Single crystals, for x = 0, 0.16, and 0.55, are presented. It is shown that there are core level shifts related to the opening of a pseudogap and that similar shifts are observed at the opening of the superconducting gap in optimally doped samples. This result is in agreement with pair formation above T-c as suggested by V.J. Emery and S.A. Kivelson [Nature (London) 374, 434 (1995)].
Place, publisher, year, edition, pages
1997. Vol. 79, no 3, 499-502 p.
IdentifiersURN: urn:nbn:se:kth:diva-84205DOI: 10.1103/PhysRevLett.79.499ISI: A1997XL54900042OAI: oai:DiVA.org:kth-84205DiVA: diva2:499279
NR 201408052012-02-132012-02-132012-02-13Bibliographically approved