Abstract
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.
| Original language | English |
|---|---|
| Pages (from-to) | 3797-3800 |
| Number of pages | 4 |
| Journal | Journal of the Physical Society of Japan |
| Volume | 56 |
| Issue number | 11 |
| DOIs | |
| Publication status | Published - 1987 |
| Externally published | Yes |
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ASJC Scopus subject areas
- Physics and Astronomy(all)
Cite this
Far-Infrared Absorption by Small Particles of YBa2Cu3O6.74 . / Kuroda, Noritaka; Chida, Fumio; Sasaki, Yoshiro; Nishina, Yuichiro; Kikuchi, Masae; Yamamoto, Ayako; Syono, Yasuhiko.
In: Journal of the Physical Society of Japan, Vol. 56, No. 11, 1987, p. 3797-3800.Research output: Contribution to journal › Article
}
TY - JOUR
T1 - Far-Infrared Absorption by Small Particles of YBa2Cu3O6.74
AU - Kuroda, Noritaka
AU - Chida, Fumio
AU - Sasaki, Yoshiro
AU - Nishina, Yuichiro
AU - Kikuchi, Masae
AU - Yamamoto, Ayako
AU - Syono, Yasuhiko
PY - 1987
Y1 - 1987
N2 - 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.
AB - 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.
UR - http://www.scopus.com/inward/record.url?scp=77952990658&partnerID=8YFLogxK
UR - http://www.scopus.com/inward/citedby.url?scp=77952990658&partnerID=8YFLogxK
U2 - 10.1143/JPSJ.56.3797
DO - 10.1143/JPSJ.56.3797
M3 - Article
VL - 56
SP - 3797
EP - 3800
JO - Journal of the Physical Society of Japan
JF - Journal of the Physical Society of Japan
SN - 0031-9015
IS - 11
ER -