Anomalous dispersion in the autocorrelation of angle-resolved photoemission spectra of high-temperature Bi2Sr2CaCu2O8+delta superconductors

TitleAnomalous dispersion in the autocorrelation of angle-resolved photoemission spectra of high-temperature Bi2Sr2CaCu2O8+delta superconductors
Publication TypeJournal Article
Year of Publication2007
AuthorsChatterjee U, Shi M, Kaminski A, Kanigel A, Fretwell HM, Terashima K, Takahashi T, Rosenkranz S, Li ZZ, Raffy H, Santander-Syro A, Kadowaki K, Randeria M, Norman MR, Campuzano JC
Journal TitlePhysical Review B
Volume76
Pages012504
Date PublishedJul
Type of ArticleArticle
ISBN Number1098-0121
Accession NumberISI:000248487900022
Keywordsstate
Abstract

We find that peaks in the autocorrelation of angle-resolved photoemission spectroscopy data of Bi2Sr2CaCu2O8+delta in the superconducting state show dispersive behavior for binding energies smaller than the maximum superconducting energy gap. For higher energies, though, a striking anomalous dispersion is observed that is a consequence of the interaction of the electrons with collective excitations. In contrast, in the pseudogap phase, we only observe dispersionless behavior for the autocorrelation peaks. The implications of our findings in regard to Fourier transformed scanning tunneling spectroscopy data are discussed.

DOI10.1103/PhysRevB.76.012504
Alternate JournalPhys. Rev. B