Quantitative determination of hybridization effect in rare-earth compounds by synchrotron radiation angle-resolved photoemission spectroscopy

2016 Fiscal Year Final Research Report

• Project/Area Number: 26800191
• Research Category: Grant-in-Aid for Young Scientists (B)
• Allocation Type: Multi-year Fund
• Research Field: Condensed matter physics II
• Research Institution: Osaka Prefecture University
• Principal Investigator: Hiroaki Anzai 大阪府立大学, 工学(系)研究科(研究院), 助教 (90609736)
• Research Collaborator: SUZUNA Ishihara 大阪府立大学, 大学院工学研究科
• Project Period (FY): 2014-04-01 – 2017-03-31
• Keywords: 重い電子系

Outline of Final Research Achievements

We performed angle-resolved photoemission spectroscopy measurements with synchrotron radiation on EuPtP, EuNi2P2, and YbInCu4. From the electronic structure near the Fermi level, we revealed that the presence of an energy gap at the crossing point of the localized 4f and conduction bands. The shape of bands is described by a hybridization-band picture based on the periodic Anderson model. Our results indicate that the c-f hybridization effect in the rare-earth compounds is relevant to the valence transition and heavy-fermion state.

Free Research Field

固体物理学