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

doi:10.1016/S0921-4534(00)01095-9

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

^*この研究の対応する著者

研究成果: Article › 査読

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
ジャーナル	Physica C: Superconductivity and its Applications
巻	341-348
DOI	https://doi.org/10.1016/S0921-4534(00)01095-9
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

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10.1016/S0921-4534(00)01095-9

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title = "Raman scattering in YBa2Cu4O8 and PrBa2Cu4O8 - indications of pseudogap effects in non-superconducting PrBa2Cu4O8",

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.",

author = "J. B{\"a}ckstr{\"o}m and M. R{\"u}bhausen and M. K{\"a}ll and L. B{\"o}rjesson and Litvinchuk, {A. P.} and M. Kakihana and M. Osada and B. Dabrowski",

year = "2000",

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doi = "10.1016/S0921-4534(00)01095-9",

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T1 - Raman scattering in YBa2Cu4O8 and PrBa2Cu4O8 - indications of pseudogap effects in non-superconducting PrBa2Cu4O8

AU - Bäckström, J.

AU - Rübhausen, M.

AU - Käll, M.

AU - Börjesson, L.

AU - Litvinchuk, A. P.

AU - Kakihana, M.

AU - Osada, M.

AU - Dabrowski, B.

PY - 2000/11

Y1 - 2000/11

N2 - 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.

AB - 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.

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