Angle Integrated Photoemission Study of SmO0.85F0.15FeAs
OU Hong-Wei1, ZHAO Jia-Feng1, ZHANG Yan1, SHEN Da-Wei1, ZHOU Bo1, YANG Le-Xian1, HE Cheng1, CHEN Fei1, XU Min1, WU Tao2, CHEN Xian-Hui2, CHEN Yan1, FENG Dong-Lai1
1Department of Physics, Surface Physics Laboratory (National Key Laboratory), and Advanced Materials Laboratory, Fudan University, Shanghai 2004332Hefei National Laboratory for Physical Sciences at Microscale and Department of Physics, University of Science and Technology of China, Hefei 230026
Angle Integrated Photoemission Study of SmO0.85F0.15FeAs
1Department of Physics, Surface Physics Laboratory (National Key Laboratory), and Advanced Materials Laboratory, Fudan University, Shanghai 2004332Hefei National Laboratory for Physical Sciences at Microscale and Department of Physics, University of Science and Technology of China, Hefei 230026
摘要The electronic structure of the new superconductor SmO1-xFxFeAs (x=0.15) is studied by angle-integrated photoemission spectroscopy. Our data show a sharp feature very close to the Fermi energy, and a relative flat distribution of the density of states between 0.5eV and 3eV binding energy, which agrees well with the band structure calculations considering an antiferromagnetic ground state. No noticeable gap opening is observed at 12K below the superconducting transition temperature, indicating the existence of large ungapped regions in the Brillouin zone.
Abstract：The electronic structure of the new superconductor SmO1-xFxFeAs (x=0.15) is studied by angle-integrated photoemission spectroscopy. Our data show a sharp feature very close to the Fermi energy, and a relative flat distribution of the density of states between 0.5eV and 3eV binding energy, which agrees well with the band structure calculations considering an antiferromagnetic ground state. No noticeable gap opening is observed at 12K below the superconducting transition temperature, indicating the existence of large ungapped regions in the Brillouin zone.
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2008, Vol. 25 
