Open AccessComparative photoemission studies on the superconducting gap of the filled skutterudite superconductors LaPt4 12 4
Author(s) -
Yoshiaki Nakamura,
Hiroyuki Okazaki,
Rikiya Yoshida,
Takanori Wakita,
Hiroyuki Takeya,
K. Hirata,
Masaaki Hirai,
Yuji Muraoka,
T. Yokoya
Publication year - 2012
Publication title -
physical review b
Language(s) - English
Resource type - Journals
eISSN - 1538-4489
pISSN - 1098-0121
DOI - 10.1103/physrevb.86.014521
Subject(s) - superconductivity , photoemission spectroscopy , skutterudite , condensed matter physics , band gap , physics , angle resolved photoemission spectroscopy , fermi level , isotropy , anisotropy , materials science , spectral line , electronic structure , electrical resistivity and conductivity , optics , quantum mechanics , thermoelectric materials , electron
We performed a comparative study of the superconducting gap in the new filled skutterudite superconductors LaPt4Ge12 and PrPt4Ge12 using high-resolution photoemission spectroscopy. We succeeded in observing spectral changes across Tc 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 PrPt4Ge12. In addition, we found that the two-gap model is more suitable for describing the superconducting-state spectrum of PrPt4Ge12 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 PrPt4Ge12
Accelerating Research
Robert Robinson Avenue,
Oxford Science Park, Oxford
OX4 4GP, United Kingdom
Address
John Eccles HouseRobert Robinson Avenue,
Oxford Science Park, Oxford
OX4 4GP, United Kingdom