Ultrahigh-resolution laser photoemission study of URu<sub>2</sub>Si<sub>2</sub> across the hidden-order transition期刊界 All Journals 搜尽天下杂志传播学术成果专业期刊搜索期刊信息化学术搜索

Ultrahigh-resolution laser photoemission study of URu₂Si₂ across the hidden-order transition

Authors:	Rikiya Yoshida Yoshiaki Nakamura Yoshinori Haga Yoshichika ōnuki Mario Okawa Masaaki Hirai Takayoshi Yokoya

Affiliation:	^a The Graduate School of Natural Science and Technology, Okayama University, Okayama 700-8530, Japan ^b Advanced Science Research Center, Japan Atomic Energy Agency, Tokai, Ibaraki 319-1195, Japan ^c Graduate School of Science, Osaka University, Toyonaka, Osaka 560-0043, Japan ^d Institute for Solid State Physics, The University of Tokyo, Kashiwa, Chiba 277-8581, Japan

Abstract:	We have studied the electronic structures of URu₂Si₂ employing ultrahigh-resolution laser angle-resolved photoemission spectroscopy. The change of photoemission spectra is investigated across the hidden-order transition, and the emergence of a narrow band is clearly observed near the Fermi level for both (π,0) and (π,π) directions. In addition, it is shown that tuning of light's polarization allows the signal of a hole-like dispersive feature to enhance. These observations prove that laser angle-resolved photoemission spectroscopy is an effective tool for studying the evolution of electronic structures across the hidden-order transition in URu₂Si₂.

Keywords:	C. Photoelectron spectroscopy D. Phase transitions D. Electronic structure
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