CONDENSED MATTER: ELECTRONIC STRUCTURE, ELECTRICAL, MAGNETIC, AND OPTICAL PROPERTIES

Angle Integrated Photoemission Study of SmO0.85F0.15FeAs

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2008 Chinese Physical Society and IOP Publishing Ltd
, , Citation Ou Hong-Wei et al 2008 Chinese Phys. Lett. 25 2225 DOI 10.1088/0256-307X/25/6/083

0256-307X/25/6/2225

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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10.1088/0256-307X/25/6/083