Raman scattering in YBa2Cu4O8 and PrBa2Cu4O8 - indications of pseudogap effects in non-superconducting PrBa2Cu4O8

J. Bäckström, M. Rübhausen, M. Käll, L. Börjesson, A. P. Litvinchuk, M. Kakihana, M. Osada, B. Dabrowski

Research output: Contribution to journalConference articlepeer-review

Abstract

By analysis of the temperature evolution of Raman spectra, we connect an observed suppression in low-energy electronic density of states to an anomalous sharpening of the Ba-phonon mode in superconducting YBa2Cu4O8 (Y-124) at around T = 150 K. We link the suppression of electronic excitations to an opening of a pseudogap. Similar effects observed for the Ba-phonon mode at roughly the same temperature in non-superconducting PrBa2Cu4O8 (Pr-124) suggests that a pseudogap opens up around 150 K also in this material.

Original languageEnglish
Pages (from-to)2251-2252
Number of pages2
JournalPhysica C: Superconductivity and its applications
Volume341-348 (IV)
DOIs
Publication statusPublished - 2000 Nov
Externally publishedYes
EventInternational Conference on Materials and Mechanisms of Superconductivity High Temperature Superconductors VI - Houston, TX, USA
Duration: 2000 Feb 202000 Feb 25

ASJC Scopus subject areas

  • Electronic, Optical and Magnetic Materials
  • Condensed Matter Physics
  • Energy Engineering and Power Technology
  • Electrical and Electronic Engineering

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