抄録
Polarisation-resolved Raman scattering on MgB2 single crystals reveals a sharp pair-breaking peak, which appears in the electronic continuum below Tc. This peak reaches an average maximum Raman shift of 105±1 cm-1 (2Δ(0)/kBTc = 4.0 ± 0.1) and shows a small anisotropy of 2-5 cm-1 as a function of polarisation. The temperature dependence follows that predicted from BCS theory and we find no evidence of a second gap feature below 2Δ. We conclude that the temperature dependence, polarisation dependence and magnitude of the superconducting gap observed by Raman scattering are consistent with a slightly anisotropic s-wave gap in a conventional BCS superconductor.
| 元の言語 | English |
|---|---|
| ページ（範囲） | 38-42 |
| ページ数 | 5 |
| ジャーナル | Physica C: Superconductivity and its Applications |
| 巻 | 378-381 |
| 発行部数 | PART 1 |
| DOI | |
| 出版物ステータス | Published - 2002 10 1 |
| 外部発表 | Yes |
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ASJC Scopus subject areas
- Electronic, Optical and Magnetic Materials
- Condensed Matter Physics
- Energy Engineering and Power Technology
- Electrical and Electronic Engineering
これを引用
Raman scattering measurement of the superconducting gap character in MgB2 single crystals. / Quilty, J. W.; Lee, S.; Yamamoto, Ayako; Tajima, S.
：: Physica C: Superconductivity and its Applications, 巻 378-381, 番号 PART 1, 01.10.2002, p. 38-42.研究成果: Article
}
TY - JOUR
T1 - Raman scattering measurement of the superconducting gap character in MgB2 single crystals
AU - Quilty, J. W.
AU - Lee, S.
AU - Yamamoto, Ayako
AU - Tajima, S.
PY - 2002/10/1
Y1 - 2002/10/1
N2 - Polarisation-resolved Raman scattering on MgB2 single crystals reveals a sharp pair-breaking peak, which appears in the electronic continuum below Tc. This peak reaches an average maximum Raman shift of 105±1 cm-1 (2Δ(0)/kBTc = 4.0 ± 0.1) and shows a small anisotropy of 2-5 cm-1 as a function of polarisation. The temperature dependence follows that predicted from BCS theory and we find no evidence of a second gap feature below 2Δ. We conclude that the temperature dependence, polarisation dependence and magnitude of the superconducting gap observed by Raman scattering are consistent with a slightly anisotropic s-wave gap in a conventional BCS superconductor.
AB - Polarisation-resolved Raman scattering on MgB2 single crystals reveals a sharp pair-breaking peak, which appears in the electronic continuum below Tc. This peak reaches an average maximum Raman shift of 105±1 cm-1 (2Δ(0)/kBTc = 4.0 ± 0.1) and shows a small anisotropy of 2-5 cm-1 as a function of polarisation. The temperature dependence follows that predicted from BCS theory and we find no evidence of a second gap feature below 2Δ. We conclude that the temperature dependence, polarisation dependence and magnitude of the superconducting gap observed by Raman scattering are consistent with a slightly anisotropic s-wave gap in a conventional BCS superconductor.
KW - MgB
KW - Raman spectroscopy
KW - Superconducting gap
UR - http://www.scopus.com/inward/record.url?scp=4444355671&partnerID=8YFLogxK
UR - http://www.scopus.com/inward/citedby.url?scp=4444355671&partnerID=8YFLogxK
U2 - 10.1016/S0921-4534(02)01378-3
DO - 10.1016/S0921-4534(02)01378-3
M3 - Article
AN - SCOPUS:4444355671
VL - 378-381
SP - 38
EP - 42
JO - Physica C: Superconductivity and its Applications
JF - Physica C: Superconductivity and its Applications
SN - 0921-4534
IS - PART 1
ER -