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 journalArticle

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
JournalPhysica C: Superconductivity and its Applications
Volume341-348
DOIs
Publication statusPublished - 2000 Nov
Externally publishedYes

ASJC Scopus subject areas

  • Condensed Matter Physics

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    Bäckström, J., Rübhausen, M., Käll, M., Börjesson, L., Litvinchuk, A. P., Kakihana, M., Osada, M., & Dabrowski, B. (2000). Raman scattering in YBa2Cu4O8 and PrBa2Cu4O8 - indications of pseudogap effects in non-superconducting PrBa2Cu4O8. Physica C: Superconductivity and its Applications, 341-348. https://doi.org/10.1016/S0921-4534(00)01095-9