Quantitative Evaluation of the Fermi surface and quasiparticle bands of correlated rare-earth thin films

2015 Fiscal Year Final Research Report

• Project/Area Number: 25400376
• Research Category: Grant-in-Aid for Scientific Research (C)
• Allocation Type: Multi-year Fund
• Section: 一般
• Research Field: Condensed matter physics II
• Research Institution: Hiroshima University
• Principal Investigator: SHIMADA KENYA 広島大学, 放射光科学研究センター, 教授 (10284225)
• Project Period (FY): 2013-04-01 – 2016-03-31
• Keywords: 角度分解光電子分光 / 電子帯構造 / セリウム薄膜 / フェルミ面 / 多体相互作用

Outline of Final Research Achievements

Ce metal is the simplest system to study many-body effects in rare-earth compounds, namely competition between the on-site Coulomb interaction and c-f hybridization interaction, which is the origin of the various physical properties. Since Ce metal is highly reactive, the detailed electronic states at low temperature have not been fully elucidated so far. In this study, we fabricated well-defined single crystalline Ce and La thin films in ultrahigh vacuum. By means of low-temperature high-resolution angle-resolved photoemission spectroscopy using synchrotron radiation, we quantitatively clarified the Fermi surfaces, band dispersions, and c-f hybridization of the thin film for the first time.

Free Research Field

放射光物性