Abstract
We performed a comparative study of the superconducting gap in the new filled skutterudite superconductors LaPt 4Ge 12 and PrPt 4Ge 12 using high-resolution photoemission spectroscopy. We succeeded in observing spectral changes across T c that reflect the opening of the superconducting gap in both compounds and also in observing a noticeable difference in their respective superconducting spectral shapes near the Fermi level, pointing toward a more complex superconducting gap structure in PrPt 4Ge 12. In addition, we found that the two-gap model is more suitable for describing the superconducting-state spectrum of PrPt 4Ge 12 than the single-isotropic-gap and single-anisotropic-gap models, which suggests an explanation that multiband effects may possibly induce the anomalous superconducting properties of PrPt 4Ge 12.
| Original language | English |
|---|---|
| Article number | 014521 |
| Journal | Physical Review B - Condensed Matter and Materials Physics |
| Volume | 86 |
| Issue number | 1 |
| DOIs | |
| Publication status | Published - Jul 26 2012 |
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ASJC Scopus subject areas
- Condensed Matter Physics
- Electronic, Optical and Magnetic Materials
Cite this
Comparative photoemission studies on the superconducting gap of the filled skutterudite superconductors LaPt 4Ge 12 and PrPt 4Ge 12 . / Nakamura, Yoshiaki; Okazaki, Hiroyuki; Yoshida, Rikiya; Wakita, Takanori; Takeya, Hiroyuki; Hirata, Kazuto; Hirai, Masaaki; Muraoka, Yuji; Yokoya, Takayoshi.
In: Physical Review B - Condensed Matter and Materials Physics, Vol. 86, No. 1, 014521, 26.07.2012.Research output: Contribution to journal › Article
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TY - JOUR
T1 - Comparative photoemission studies on the superconducting gap of the filled skutterudite superconductors LaPt 4Ge 12 and PrPt 4Ge 12
AU - Nakamura, Yoshiaki
AU - Okazaki, Hiroyuki
AU - Yoshida, Rikiya
AU - Wakita, Takanori
AU - Takeya, Hiroyuki
AU - Hirata, Kazuto
AU - Hirai, Masaaki
AU - Muraoka, Yuji
AU - Yokoya, Takayoshi
PY - 2012/7/26
Y1 - 2012/7/26
N2 - We performed a comparative study of the superconducting gap in the new filled skutterudite superconductors LaPt 4Ge 12 and PrPt 4Ge 12 using high-resolution photoemission spectroscopy. We succeeded in observing spectral changes across T c that reflect the opening of the superconducting gap in both compounds and also in observing a noticeable difference in their respective superconducting spectral shapes near the Fermi level, pointing toward a more complex superconducting gap structure in PrPt 4Ge 12. In addition, we found that the two-gap model is more suitable for describing the superconducting-state spectrum of PrPt 4Ge 12 than the single-isotropic-gap and single-anisotropic-gap models, which suggests an explanation that multiband effects may possibly induce the anomalous superconducting properties of PrPt 4Ge 12.
AB - We performed a comparative study of the superconducting gap in the new filled skutterudite superconductors LaPt 4Ge 12 and PrPt 4Ge 12 using high-resolution photoemission spectroscopy. We succeeded in observing spectral changes across T c that reflect the opening of the superconducting gap in both compounds and also in observing a noticeable difference in their respective superconducting spectral shapes near the Fermi level, pointing toward a more complex superconducting gap structure in PrPt 4Ge 12. In addition, we found that the two-gap model is more suitable for describing the superconducting-state spectrum of PrPt 4Ge 12 than the single-isotropic-gap and single-anisotropic-gap models, which suggests an explanation that multiband effects may possibly induce the anomalous superconducting properties of PrPt 4Ge 12.
UR - http://www.scopus.com/inward/record.url?scp=84864448789&partnerID=8YFLogxK
UR - http://www.scopus.com/inward/citedby.url?scp=84864448789&partnerID=8YFLogxK
U2 - 10.1103/PhysRevB.86.014521
DO - 10.1103/PhysRevB.86.014521
M3 - Article
AN - SCOPUS:84864448789
VL - 86
JO - Physical Review B-Condensed Matter
JF - Physical Review B-Condensed Matter
SN - 1098-0121
IS - 1
M1 - 014521
ER -