Article ID | Journal | Published Year | Pages | File Type |
---|---|---|---|---|
7839563 | Journal of Electron Spectroscopy and Related Phenomena | 2017 | 5 Pages |
Abstract
We studied the electronic structure of YbInCu4, which exhibits a first-order valence transition, using angle-resolved photoemission spectroscopy. The dispersive conduction bands and the spin-orbit split Yb 4f7/2 and 4f5/2 states were observed clearly near the Fermi level. We revealed that a flat band located â80 meV below the 4f7/2 state shows a momentum-dependent behavior around the M¯ point of the surface Brillouin zone, and it was described by a hybridization-band picture based on the periodic Anderson model. We attributed the observed momentum-dependent behavior to the effect of hybridization between the conduction and 4f electrons in the subsurface region of YbInCu4.
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Authors
Suzuna Ishihara, Katsuya Ichiki, Kodai Abe, Takayuki Matsumoto, Kojiro Mimura, Hitoshi Sato, Masashi Arita, Eike F. Schwier, Hideaki Iwasawa, Kenya Shimada, Hirofumi Namatame, Masaki Taniguchi, Tao Zhuang, Koichi Hiraoka, Hiroaki Anzai,