TY - JOUR
T1 - Carbon-substitution dependent multiple superconducting gap of Mg B2
T2 - A sub-meV resolution photoemission study
AU - Tsuda, S.
AU - Yokoya, T.
AU - Kiss, T.
AU - Shimojima, T.
AU - Shin, S.
AU - Togashi, T.
AU - Watanabe, S.
AU - Zhang, C.
AU - Chen, C. T.
AU - Lee, S.
AU - Uchiyama, H.
AU - Tajima, S.
AU - Nakai, N.
AU - Machida, K.
PY - 2005/8/1
Y1 - 2005/8/1
N2 - "Sub-meV" resolution photoemission spectroscopy was used to study carbon-substitution dependence of the multiple superconducting gap of Mg (B1-x Cx) 2. Two features corresponding to σ and π gaps are clearly observed in the raw spectra up to carbon concentration x=0.075. The observed x dependence of the two gaps shows a qualitatively different behavior: the σ gap is proportional to Tc while the π gap shows negligible change. Doping as well as temperature dependence can be explained within the two-band mean-field theory. Implications from the present study are discussed.
AB - "Sub-meV" resolution photoemission spectroscopy was used to study carbon-substitution dependence of the multiple superconducting gap of Mg (B1-x Cx) 2. Two features corresponding to σ and π gaps are clearly observed in the raw spectra up to carbon concentration x=0.075. The observed x dependence of the two gaps shows a qualitatively different behavior: the σ gap is proportional to Tc while the π gap shows negligible change. Doping as well as temperature dependence can be explained within the two-band mean-field theory. Implications from the present study are discussed.
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U2 - 10.1103/PhysRevB.72.064527
DO - 10.1103/PhysRevB.72.064527
M3 - Article
AN - SCOPUS:33644519041
SN - 1098-0121
VL - 72
JO - Physical Review B - Condensed Matter and Materials Physics
JF - Physical Review B - Condensed Matter and Materials Physics
IS - 6
M1 - 064527
ER -