TY - JOUR
T1 - Evolution of Fermi surface and superconducting gap by electron doping in Ba(Fe,Co)2As2
AU - Sudayama, T.
AU - Wakisaka, Y.
AU - Takubo, K.
AU - Morinaga, R.
AU - Sato, T. J.
AU - Arita, M.
AU - Namatame, H.
AU - Taniguchi, M.
AU - Mizokawa, T.
N1 - Funding Information:
The authors would like to thank Dr. Y. Aiura and Prof. A. Fujimori for informative discussions. This work was supported in part by the Global COE Program “the Physical Sciences Frontier”, MEXT, Japan.
PY - 2010/12
Y1 - 2010/12
N2 - We report on an electronic structural study of BaFe1.7Co 0.3As2 in heavily electron doped regime of the FeAs-based superconductors. Three hole bands around the zone center are clearly observed and two of them reach the Fermi level (EF) forming two hole pockets. Top of the lowest hole band is located at ∼30 meV below EF showing that it undergoes a pocket-vanishing type Lifshitz transition by electron doping. Around the zone corner, two electron pockets are clearly observed, and the smaller electron pocket is apparently nested with the larger hole pocket at the zone center.
AB - We report on an electronic structural study of BaFe1.7Co 0.3As2 in heavily electron doped regime of the FeAs-based superconductors. Three hole bands around the zone center are clearly observed and two of them reach the Fermi level (EF) forming two hole pockets. Top of the lowest hole band is located at ∼30 meV below EF showing that it undergoes a pocket-vanishing type Lifshitz transition by electron doping. Around the zone corner, two electron pockets are clearly observed, and the smaller electron pocket is apparently nested with the larger hole pocket at the zone center.
KW - Angle-resolved photoemission spectroscopy
KW - Electronic structure
KW - Fe pnictide
KW - FeAs-based superconductor
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U2 - 10.1016/j.physc.2009.11.017
DO - 10.1016/j.physc.2009.11.017
M3 - Article
AN - SCOPUS:78649701653
SN - 0921-4534
VL - 470
SP - S449-S451
JO - Physica C: Superconductivity and its Applications
JF - Physica C: Superconductivity and its Applications
IS - SUPPL.1
ER -