Ultrahigh-resolution laser photoemission study of URu2Si 2 across the hidden-order transition

Rikiya Yoshida; Yoshiaki Nakamura; Masaki Fukui; Yoshinori Haga; Etsuji Yamamoto; Yoshichika Nuki; Mario Okawa; Shik Shin; Masaaki Hirai; Yuji Muraoka; Takayoshi Yokoya

doi:10.1016/j.jpcs.2010.10.048

Ultrahigh-resolution laser photoemission study of URu₂Si ₂ across the hidden-order transition

Rikiya Yoshida^*, Yoshiaki Nakamura, Masaki Fukui, Yoshinori Haga, Etsuji Yamamoto, Yoshichika Nuki, Mario Okawa, Shik Shin, Masaaki Hirai, Yuji Muraoka, Takayoshi Yokoya

^*この研究の対応する著者

研究成果: Article › 査読

3 被引用数 (Scopus)

抄録

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.

本文言語	English
ページ（範囲）	580-581
ページ数	2
ジャーナル	Journal of Physics and Chemistry of Solids
巻	72
号	5
DOI	https://doi.org/10.1016/j.jpcs.2010.10.048
出版ステータス	Published - 2011 5月
外部発表	はい

ASJC Scopus subject areas

化学 (全般)
材料科学（全般）
凝縮系物理学

文献へのアクセス

10.1016/j.jpcs.2010.10.048

他のファイルとリンク

引用スタイル

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title = "Ultrahigh-resolution laser photoemission study of URu2Si 2 across the hidden-order transition",

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. Electronic structure, D. Phase transitions",

author = "Rikiya Yoshida and Yoshiaki Nakamura and Masaki Fukui and Yoshinori Haga and Etsuji Yamamoto and Yoshichika Nuki and Mario Okawa and Shik Shin and Masaaki Hirai and Yuji Muraoka and Takayoshi Yokoya",

note = "Funding Information: We are grateful to I. Kawasaki, H. Yamagami, H. Harima, K. Miyake, T. Shimojima, K. Okazaki, Y. Ishida, W. Malaeb, and K. Machida for valuable comments. This work is supported by a Grant-in-Aid for Scientific Research on Innovative Areas {\textquoteleft}Heavy Electrons{\textquoteright} ( Nos. 20102002 and 20102003 ) and Grant-in-Aid for Scientific Research (S) ( No. 20224015 ) of Ministry of Education, Culture, Sports, Science and Technology, Japan. Photoemission experiments were carried out under the Visiting Researcher's Program of the Institute for Solid State Physics, the University of Tokyo. R.Y. acknowledges the financial support from Research Fellowship of the Japan Society for the Promotion of Science.",

year = "2011",

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doi = "10.1016/j.jpcs.2010.10.048",

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AU - Yoshida, Rikiya

AU - Nakamura, Yoshiaki

AU - Fukui, Masaki

AU - Haga, Yoshinori

AU - Yamamoto, Etsuji

AU - Nuki, Yoshichika

AU - Okawa, Mario

AU - Shin, Shik

AU - Hirai, Masaaki

AU - Muraoka, Yuji

AU - Yokoya, Takayoshi

N1 - Funding Information: We are grateful to I. Kawasaki, H. Yamagami, H. Harima, K. Miyake, T. Shimojima, K. Okazaki, Y. Ishida, W. Malaeb, and K. Machida for valuable comments. This work is supported by a Grant-in-Aid for Scientific Research on Innovative Areas ‘Heavy Electrons’ ( Nos. 20102002 and 20102003 ) and Grant-in-Aid for Scientific Research (S) ( No. 20224015 ) of Ministry of Education, Culture, Sports, Science and Technology, Japan. Photoemission experiments were carried out under the Visiting Researcher's Program of the Institute for Solid State Physics, the University of Tokyo. R.Y. acknowledges the financial support from Research Fellowship of the Japan Society for the Promotion of Science.

PY - 2011/5

Y1 - 2011/5

N2 - 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.

AB - 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.

KW - C. Photoelectron spectroscopy

KW - D. Electronic structure

KW - D. Phase transitions

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