Far-Infrared Absorption by Small Particles of YBa2Cu3O6.74

Noritaka Kuroda, Fumio Chida, Yoshiro Sasaki, Yuichiro Nishina, Masae Kikuchi, Ayako Tokiwa, Yasuhiko Syono

研究成果: Article査読

5 被引用数 (Scopus)

抄録

The presence of the superconducting energy gap, 2〉, in YBa2Cu3O6.74 has been observed directly at 45 ±5 cm-1 and at 1.6 K by far-infrared absorption measurements in small particles embedded randomly in a polyethylene film. This result indicates that the gap has the minimum of 2〉min≃0.7 kTc, and thus the gap is finite along any direction in the crystal. Transverse effective charges associated with polar optical phonons at 144, 280, and 315 cm-1 increase by a factor of 4 ~ 5 upon a decrease in the temperature from 295 K to 1.6 K, suggesting the presence of an anomalous electron-phonon coupling in this material.

本文言語English
ページ(範囲)3797-3800
ページ数4
ジャーナルJournal of the Physical Society of Japan
56
11
DOI
出版ステータスPublished - 1987 1 1
外部発表はい

ASJC Scopus subject areas

  • 物理学および天文学(全般)

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