抄録
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.
本文言語 | English |
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ジャーナル | Physica C: Superconductivity and its Applications |
巻 | 341-348 |
DOI | |
出版ステータス | Published - 2000 11月 |
外部発表 | はい |
ASJC Scopus subject areas
- 凝縮系物理学