Anomalies in the Fermi Surface and Band Dispersion of Quasi-One-Dimensional CuO Chains in the High-Temperature Superconductor YBa2Cu4O8

TitleAnomalies in the Fermi Surface and Band Dispersion of Quasi-One-Dimensional CuO Chains in the High-Temperature Superconductor YBa2Cu4O8
Publication TypeJournal Article
Year of Publication2010
AuthorsKondo T, Khasanov R, Karpinski J, Kazakov SM, Zhigadlo ND, Bukowski Z, Shi M, Bendounan A, Sassa Y, Chang J, Pailhes S, Mesot J, Schmalian J, Keller H, Kaminski A
Journal TitlePhysical Review Letters
Volume105
Pages267003
Date Published12
Type of ArticleArticle
ISBN Number0031-9007
Accession NumberISI:000286765200009
Keywordsbi2sr2cacu2o8+delta, copper-oxide superconductors, CROSSOVER, LIQUIDS, luttinger, MAGNETIC EXCITATIONS, pressure, t-c
Abstract

We have investigated the electronic states in quasi-one-dimensional CuO chains by microprobe angle resolved photoemission spectroscopy. We find that the quasiparticle Fermi surface consists of six disconnected segments, consistent with recent theoretical calculations that predict the formation of narrow, elongated Fermi surface pockets for coupled CuO chains. In addition, we find a strong renormalization effect with a significant kink structure in the band dispersion. The properties of this latter effect [energy scale (similar to 40 meV), temperature dependence, and behavior with Zn-doping] are identical to those of the bosonic mode observed in CuO2 planes of high-temperature superconductors, indicating they have a common origin.

URL<Go to ISI>://000286765200009
DOI10.1103/PhysRevLett.105.267003
Alternate JournalPhys. Rev. Lett.