Temperature dependence of Yb valence in the sub-surface of YbB12(001)

Kenta Hagiwara; Yusuke Takeno; Yoshiyuki Ohtsubo; Ryu Yukawa; Masaki Kobayashi; Koji Horiba; Hiroshi Kumigashira; Julien Rault; Patrick Le Fevre; Francois Bertran; Amina Taleb-Ibrahimi; Fumitoshi Iga; Shin Ichi Kimura

doi:10.1088/1742-6596/807/1/012003

Temperature dependence of Yb valence in the sub-surface of YbB₁₂(001)

Kenta Hagiwara, Yusuke Takeno, Yoshiyuki Ohtsubo, Ryu Yukawa, Masaki Kobayashi, Koji Horiba, Hiroshi Kumigashira, Julien Rault, Patrick Le Fevre, Francois Bertran, Amina Taleb-Ibrahimi, Fumitoshi Iga, Shin Ichi Kimura

Research output: Contribution to journal › Conference article › peer-review

5 Citations (Scopus)

Abstract

The typical Kondo insulator, YbB₁₂, is a candidate of topological Kondo insulators. To clarify the surface electronic structure of not only bulk but also surface by photoelectron measurements, we developed a method to obtain a clean surface of YbB₁₂(001) by annealing at 1650 K in an ultra-high vacuum. By surface-sensitive photoelectron measurements, it was known that the surface consists of only B atoms without Yb. In the sub-surface region, Yb atoms exist and the temperature dependence of the valence agrees with those of previous HAXPES results. Here we report the cleaning method to obtain well-defined YbB₁₂(001) surfaces and the temperature-dependent Yb valence obtained from Yb 3d core-level and valence photoelectron spectra.

Original language	English
Article number	012003
Journal	Journal of Physics: Conference Series
Volume	807
Issue number	1
DOIs	https://doi.org/10.1088/1742-6596/807/1/012003
Publication status	Published - 2017 Apr 6
Externally published	Yes
Event	18th International Conference on Strongly Correlated Electron Systems, SCES 2016 - Hangzhou, China Duration: 2016 May 9 → 2016 May 13

ASJC Scopus subject areas

Physics and Astronomy(all)

Access to Document

10.1088/1742-6596/807/1/012003

Fingerprint Dive into the research topics of 'Temperature dependence of Yb valence in the sub-surface of YbB<sub>12</sub>(001)'. Together they form a unique fingerprint.

Cite this

Temperature dependence of Yb valence in the sub-surface of YbB₁₂(001). / Hagiwara, Kenta; Takeno, Yusuke; Ohtsubo, Yoshiyuki; Yukawa, Ryu; Kobayashi, Masaki; Horiba, Koji; Kumigashira, Hiroshi; Rault, Julien; Le Fevre, Patrick; Bertran, Francois; Taleb-Ibrahimi, Amina; Iga, Fumitoshi; Kimura, Shin Ichi.

In: Journal of Physics: Conference Series, Vol. 807, No. 1, 012003, 06.04.2017.

Research output: Contribution to journal › Conference article › peer-review

Hagiwara, Kenta ; Takeno, Yusuke ; Ohtsubo, Yoshiyuki ; Yukawa, Ryu ; Kobayashi, Masaki ; Horiba, Koji ; Kumigashira, Hiroshi ; Rault, Julien ; Le Fevre, Patrick ; Bertran, Francois ; Taleb-Ibrahimi, Amina ; Iga, Fumitoshi ; Kimura, Shin Ichi. / Temperature dependence of Yb valence in the sub-surface of YbB₁₂(001). In: Journal of Physics: Conference Series. 2017 ; Vol. 807, No. 1.

@article{bc9c6f3b76a6434285a5e5ffe21e2c78,

title = "Temperature dependence of Yb valence in the sub-surface of YbB12(001)",

abstract = "The typical Kondo insulator, YbB12, is a candidate of topological Kondo insulators. To clarify the surface electronic structure of not only bulk but also surface by photoelectron measurements, we developed a method to obtain a clean surface of YbB12(001) by annealing at 1650 K in an ultra-high vacuum. By surface-sensitive photoelectron measurements, it was known that the surface consists of only B atoms without Yb. In the sub-surface region, Yb atoms exist and the temperature dependence of the valence agrees with those of previous HAXPES results. Here we report the cleaning method to obtain well-defined YbB12(001) surfaces and the temperature-dependent Yb valence obtained from Yb 3d core-level and valence photoelectron spectra.",

author = "Kenta Hagiwara and Yusuke Takeno and Yoshiyuki Ohtsubo and Ryu Yukawa and Masaki Kobayashi and Koji Horiba and Hiroshi Kumigashira and Julien Rault and {Le Fevre}, Patrick and Francois Bertran and Amina Taleb-Ibrahimi and Fumitoshi Iga and Kimura, {Shin Ichi}",

note = "Funding Information: This work was performed by Photon Factory Proposal No. 2015G540. The JSPS Grant-in-Aid also supported this work for Scientific Research (B) (Grant No. 15H03676). Publisher Copyright: {\textcopyright} Published under licence by IOP Publishing Ltd. Copyright: Copyright 2018 Elsevier B.V., All rights reserved.; 18th International Conference on Strongly Correlated Electron Systems, SCES 2016 ; Conference date: 09-05-2016 Through 13-05-2016",

year = "2017",

month = apr,

day = "6",

doi = "10.1088/1742-6596/807/1/012003",

language = "English",

volume = "807",

journal = "Journal of Physics: Conference Series",

issn = "1742-6588",

publisher = "IOP Publishing Ltd.",

number = "1",

}

TY - JOUR

T1 - Temperature dependence of Yb valence in the sub-surface of YbB12(001)

AU - Hagiwara, Kenta

AU - Takeno, Yusuke

AU - Ohtsubo, Yoshiyuki

AU - Yukawa, Ryu

AU - Kobayashi, Masaki

AU - Horiba, Koji

AU - Kumigashira, Hiroshi

AU - Rault, Julien

AU - Le Fevre, Patrick

AU - Bertran, Francois

AU - Taleb-Ibrahimi, Amina

AU - Iga, Fumitoshi

AU - Kimura, Shin Ichi

N1 - Funding Information: This work was performed by Photon Factory Proposal No. 2015G540. The JSPS Grant-in-Aid also supported this work for Scientific Research (B) (Grant No. 15H03676). Publisher Copyright: © Published under licence by IOP Publishing Ltd. Copyright: Copyright 2018 Elsevier B.V., All rights reserved.

PY - 2017/4/6

Y1 - 2017/4/6

N2 - The typical Kondo insulator, YbB12, is a candidate of topological Kondo insulators. To clarify the surface electronic structure of not only bulk but also surface by photoelectron measurements, we developed a method to obtain a clean surface of YbB12(001) by annealing at 1650 K in an ultra-high vacuum. By surface-sensitive photoelectron measurements, it was known that the surface consists of only B atoms without Yb. In the sub-surface region, Yb atoms exist and the temperature dependence of the valence agrees with those of previous HAXPES results. Here we report the cleaning method to obtain well-defined YbB12(001) surfaces and the temperature-dependent Yb valence obtained from Yb 3d core-level and valence photoelectron spectra.

AB - The typical Kondo insulator, YbB12, is a candidate of topological Kondo insulators. To clarify the surface electronic structure of not only bulk but also surface by photoelectron measurements, we developed a method to obtain a clean surface of YbB12(001) by annealing at 1650 K in an ultra-high vacuum. By surface-sensitive photoelectron measurements, it was known that the surface consists of only B atoms without Yb. In the sub-surface region, Yb atoms exist and the temperature dependence of the valence agrees with those of previous HAXPES results. Here we report the cleaning method to obtain well-defined YbB12(001) surfaces and the temperature-dependent Yb valence obtained from Yb 3d core-level and valence photoelectron spectra.

UR - http://www.scopus.com/inward/record.url?scp=85018262056&partnerID=8YFLogxK

UR - http://www.scopus.com/inward/citedby.url?scp=85018262056&partnerID=8YFLogxK

U2 - 10.1088/1742-6596/807/1/012003

DO - 10.1088/1742-6596/807/1/012003

M3 - Conference article

AN - SCOPUS:85018262056

VL - 807

JO - Journal of Physics: Conference Series

JF - Journal of Physics: Conference Series

SN - 1742-6588

IS - 1

M1 - 012003

T2 - 18th International Conference on Strongly Correlated Electron Systems, SCES 2016

Y2 - 9 May 2016 through 13 May 2016