Li化学状態の空間分布を可視化する極低エネルギー軟X線顕微鏡の開発

• Project/Area Number: 20H02853
• Research Category: Grant-in-Aid for Scientific Research (B)
• Allocation Type: Single-year Grants
• Section: 一般
• Review Section: Basic Section 36020:Energy-related chemistry
• Research Institution: National Institutes for Quantum Science and Technology (2021-2023); High Energy Accelerator Research Organization (2020)
• Principal Investigator: 堀場 弘司 国立研究開発法人量子科学技術研究開発機構, 関西光量子科学研究所 放射光科学研究センター, 上席研究員 (10415292)
• Co-Investigator(Kenkyū-buntansha): 北村 未歩 国立研究開発法人量子科学技術研究開発機構, 関西光量子科学研究所 放射光科学研究センター, 併任 (00783581) ; 細野 英司 国立研究開発法人産業技術総合研究所, エネルギー・環境領域, 主任研究員 (80462852)
• Project Period (FY): 2020-04-01 – 2024-03-31
• Project Status: Granted (Fiscal Year 2023)
• Budget Amount: ¥18,070,000 (Direct Cost: ¥13,900,000、Indirect Cost: ¥4,170,000); Fiscal Year 2023: ¥3,250,000 (Direct Cost: ¥2,500,000、Indirect Cost: ¥750,000); Fiscal Year 2022: ¥3,250,000 (Direct Cost: ¥2,500,000、Indirect Cost: ¥750,000); Fiscal Year 2021: ¥3,250,000 (Direct Cost: ¥2,500,000、Indirect Cost: ¥750,000); Fiscal Year 2020: ¥8,320,000 (Direct Cost: ¥6,400,000、Indirect Cost: ¥1,920,000)
• Keywords: 軟X線吸収分光 / Liイオン電池 / 転換可視蛍光収量

Outline of Research at the Start

Liイオン電池等の蓄エネルギーシステムは、固体電極活物質内へのイオンの空間的移動を動作原理とするため、物質中におけるLiイオンの空間的挙動を解明することは非常に重要である。しかしLi元素における唯一のX線吸収端である50 eV付近の極低エネルギー軟X線は物質への透過力が非常に小さいため、通常の軟X線顕微分光の適用が困難であった。そこで本研究では、反射型集光素子や転換可視蛍光収量法などの新しい要素技術を適用して、極低エネルギー軟X線領域でも利用可能な走査型透過軟X線顕微鏡を開発し、Liイオン電池等におけるLiイオン化学状態のナノスケール空間分布の可視化を目指す。

Outline of Annual Research Achievements

Liは蓄エネルギーデバイスの根幹を担う元素として近年その重要性が益々高まっており、特にLiイオン電池等の蓄エネルギーシステムは、固体電極活物質内へのイオンの空間的移動を動作原理とするため、物質中におけるLiイオンの空間的挙動を解明することは非常に重要である。Liイオンを元素識別するためにはX線吸収端の利用が必要不可欠であるが、Li元素における唯一のX線吸収端である50 eV付近の極低エネルギー軟X線は物質への透過力が非常に小さいため、通常の透過型集光素子や試料透過X線測定を用いた軟X線顕微分光の適用が困難である。そこで本研究では、反射型集光素子や転換可視蛍光収量法などの新しい要素技術を適用して、極低エネルギー軟X線領域でも利用可能な走査型透過軟X線顕微鏡を開発し、Liイオン電池等におけるLiイオン化学状態のナノスケール空間分布の可視化を目指す。これまでに、50eVでの集光が可能な反射型集光素子であるK-Bミラーシステムの設計・作製を行い、10ミクロン級の集光に成功した。またこの集光システムをARPES装置に組み込み、空間分解能10ミクロンでの分光測定に成功した。
令和4年度は、この開発したマイクロ集光ARPESシステムを用いて様々な微小試料や不均一試料における顕微分光計測を行うとともに、別ビームラインにおいてLiイオンのX線吸収分光計測に取り組み、金属LiやLi化合物等の試料においてLiK吸収端の吸収分光計測に成功した。

Current Status of Research Progress

2: Research has progressed on the whole more than it was originally planned.

Reason

本研究申請における達成目標は、目的である「50 eVの極低エネルギー軟X線領域でも利用可能な走査型透過軟X線顕微鏡」を完成させることにある。完成までの工程としては、
①転換可視蛍光収量法の改善に取り組み、50 eVの極低エネルギー軟X線において高効率・高性能で利用可能なシンチレーション基板の探索と検出システムの最適化を行う。
②K-Bミラー集光システムを構築し、50 eVの極低エネルギー軟X線においてマイクロビームを達成する。
③①と②の両者を融合し、また顕微分光用の高精度試料走査ステージと組み合わせてシステム化することで、50 eVの極低エネルギー軟X線領域でも利用可能な走査型透過軟X線顕微鏡を実現する。
の3段階に分けられる。
現在までに②のK-Bミラー集光システムによる50 eVの極低エネルギー軟X線のマイクロ集光を実現しており、空間分解能10μmでの分光計測に成功していることから、ほぼ目標を達成出来ている。また①についても検出システムの開発が進んでおり、計画通り順調に推移している。

Strategy for Future Research Activity

本研究申請における達成目標は、目的である「50 eVの極低エネルギー軟X線領域でも利用可能な走査型透過軟X線顕微鏡」を完成させることにある。完成までの工程としては、
①転換可視蛍光収量法の改善に取り組み、50 eVの極低エネルギー軟X線において高効率・高性能で利用可能なシンチレーション基板の探索と検出システムの最適化を行う。
②K-Bミラー集光システムを構築し、50 eVの極低エネルギー軟X線においてマイクロビームを達成する。
③①と②の両者を融合し、また顕微分光用の高精度試料走査ステージと組み合わせてシステム化することで、50 eVの極低エネルギー軟X線領域でも利用可能な走査型透過軟X線顕微鏡を実現する。
の3段階に分けられる。
現在までに②のK-Bミラー集光システムによる50 eVの極低エネルギー軟X線のマイクロ集光および顕微分光実験を実現しており、今後は引き続き①の検出システム開発に重点的に取り組んでいく予定である。

Research Products

• [Journal Article] Direct Imaging of Band Structure for Powdered Rhombohedral Boron Monosulfide by Microfocused ARPES (2023)
  • Author(s): Katsuaki Sugawara, Haruki Kusaka, Tappei Kawakami, Koki Yanagizawa, Asuka Honma, Seigo Souma, Kosuke Nakayama, Masashi Miyakawa, Takashi Taniguchi, Miho Kitamura, Koji Horiba, Hiroshi Kumigashira, Takashi Takahashi, Shin-ichi Orimo, Masayuki Toyoda, Susumu Saito, Takahiro Kondo, and Takafumi Sato
  • Journal Title: Nano Letters Volume: 23 Issue: 5 Pages: 1673-1679
  • DOI: 10.1021/acs.nanolett.2c04048
  • Peer Reviewed / Open Access
• [Journal Article] Redox Reaction in Ti-Mn Redox Flow Battery Studied by X-ray Absorption Spectroscopy (2022)
  • Author(s): Asakura Daisuke、Hosono Eiji、Kitamura Miho、Horiba Koji、Magome Eisuke、Setoyama Hiroyuki、Kobayashi Eiichi、Yuzawa Hayato、Ohigashi Takuji、Sakai Takaaki、Kanega Ryoichi、Funaki Takashi、Sato Yukari、Ohira Akihiro
  • Journal Title: Chemistry-An Asian Journal Volume: 18 Issue: 1
  • DOI: 10.1002/asia.202201047
  • Peer Reviewed
• [Journal Article] Design of nano-ARPES beamline at 3-GeV next-generation synchrotron radiation facility, NanoTerasu (2022)
  • Author(s): K. Horiba, T. Imazono, H. Iwasawa, K. Fujii, J. Miyawaki, Y. Ohtsubo, N. Inami, T. Nakatani, K. Inaba, A. Agui, H. Kimura, and M. Takahasi
  • Journal Title: Journal of Physics: Conference Series Volume: 2380 Issue: 1 Pages: 012034-012034
  • DOI: 10.1088/1742-6596/2380/1/012034
  • Peer Reviewed
• [Journal Article] Fermiology and Origin of Tc Enhancement in a Kagome Superconductor Cs(V1－xNbx)3Sb5 (2022)
  • Author(s): Kato Takemi、Li Yongkai、Nakayama Kosuke、Wang Zhiwei、Souma Seigo、Matsui Fumihiko、Kitamura Miho、Horiba Koji、Kumigashira Hiroshi、Takahashi Takashi、Yao Yugui、Sato Takafumi
  • Journal Title: Physical Review Letters Volume: 129 Issue: 20 Pages: 206402-206402
  • DOI: 10.1103/physrevlett.129.206402
  • Peer Reviewed / Int'l Joint Research
• [Journal Article] Low-temperature-processable amorphous-oxide-semiconductor-based phosphors for durable light-emitting diodes (2022)
  • Author(s): Ide Keisuke、Watanabe Naoto、Katase Takayoshi、Sasase Masato、Kim Junghwan、Ueda Shigenori、Horiba Koji、Kumigashira Hiroshi、Hiramatsu Hidenori、Hosono Hideo、Kamiya Toshio
  • Journal Title: Applied Physics Letters Volume: 121 Issue: 19 Pages: 192108-192108
  • DOI: 10.1063/5.0115384
  • Peer Reviewed
• [Journal Article] Signature of topological band crossing in ferromagnetic Cr1/3NbSe2 epitaxial thin film (2022)
  • Author(s): Saika Bruno Kenichi、Hamao Satoshi、Majima Yuki、Huang Xiang、Matsuoka Hideki、Yoshida Satoshi、Kitamura Miho、Sakano Masato、Hatanaka Tatsuto、Nomoto Takuya、Hirayama Motoaki、Horiba Koji、Kumigashira Hiroshi、Arita Ryotaro、Iwasa Yoshihiro、Nakano Masaki、Ishizaka Kyoko
  • Journal Title: Physical Review Research Volume: 4 Issue: 4
  • DOI: 10.1103/physrevresearch.4.l042021
  • Peer Reviewed / Open Access / Int'l Joint Research
• [Journal Article] Fermiology of a topological line-nodal compound CaSb2 and its implication to superconductivity: Angle-resolved photoemission study (2022)
  • Author(s): Chuang Chien-Wen、Souma Seigo、Moriya Ayumi、（省略）、Kumigashira Hiroshi、Takahashi Takashi、Yonezawa Shingo、Paglione Johnpierre、Maeno Yoshiteru、Sato Takafumi
  • Journal Title: Physical Review Materials Volume: 6 Issue: 10 Pages: 104203-1
  • DOI: 10.1103/physrevmaterials.6.104203
  • Peer Reviewed / Int'l Joint Research
• [Journal Article] Metallic Surface State in the Bulk Insulating Phase of Ca_2?<i>_x</i>Sr<i>_x</i>RuO₄ (<i>x</i> = 0.06) Studied by Photoemission Spectroscopy (2022)
  • Author(s): Ootsuki Daiki、Hishikawa Ayuko、Ishida Tatsuhiro、Shibata Daisuke、Takasuka Yukie、Kitamura Miho、Horiba Koji、Takagi Yasumasa、Yasui Akira、Sow Chanchal、Yonezawa Shingo、Maeno Yoshiteru、Yoshida Teppei
  • Journal Title: Journal of the Physical Society of Japan Volume: 91 Issue: 11 Pages: 114704-114704
  • DOI: 10.7566/jpsj.91.114704
  • Peer Reviewed / Open Access
• [Journal Article] Giant spin-to-charge conversion at an all-epitaxial single-crystal-oxide Rashba interface with a strongly correlated metal interlayer (2022)
  • Author(s): Kaneta-Takada Shingo、Kitamura Miho、Arai Shoma、Arai Takuma、Okano Ryo、Anh Le Duc、Endo Tatsuro、Horiba Koji、Kumigashira Hiroshi、Kobayashi Masaki、Seki Munetoshi、Tabata Hitoshi、Tanaka Masaaki、Ohya Shinobu
  • Journal Title: Nature Communications Volume: 13 Issue: 1 Pages: 1-8
  • DOI: 10.1038/s41467-022-33350-5
  • Peer Reviewed / Open Access
• [Journal Article] Polarity-dependent charge density wave in the kagome superconductor CsV3Sb5 (2022)
  • Author(s): Kato Takemi、Li Yongkai、Nakayama Kosuke、Wang Zhiwei、Souma Seigo、Kitamura Miho、Horiba Koji、Kumigashira Hiroshi、Takahashi Takashi、Sato Takafumi
  • Journal Title: Physical Review B Volume: 106 Issue: 12
  • DOI: 10.1103/physrevb.106.l121112
  • Peer Reviewed / Int'l Joint Research
• [Journal Article] Anomalously large spin-dependent electron correlation in the nearly half-metallic ferromagnet CoS2 (2022)
  • Author(s): H. Fujiwara, K. Terashima, J. Otsuki, N. Takemori、H. O. Jeschke、T. Wakitai、Y. Yano、W. Hosoda、N. Kataoka、A. Teruya、M. Kakihana、M. Hedo、T. Nakama、Y. Onuki、K. Yaji、A. Harasawa、K. Kuroda、S. Shin、K. Horiba、H. Kumigashira、Y. Muraoka、T. Yokoya
  • Journal Title: Physical Review B Volume: 106 Issue: 8 Pages: 085114-085114
  • DOI: 10.1103/physrevb.106.085114
  • Peer Reviewed
• [Journal Article] Rhombic Fermi surfaces in a ferromagnetic MnGa thin film with perpendicular magnetic anisotropy (2022)
  • Author(s): Kobayashi M.、Khang N. H. D.、Takeda T.、Araki K.、Okano R.、Suzuki M.、Kuroda K.、Yaji K.、Sugawara K.、Souma S.、Nakayama K.、Yamauchi K.、Kitamura M.、Horiba K.、Fujimori A.、Sato T.、Shin S.、Tanaka M.、Hai P. N.
  • Journal Title: Physical Review Materials Volume: 6 Issue: 7 Pages: 074403-074403
  • DOI: 10.1103/physrevmaterials.6.074403
  • Peer Reviewed / Int'l Joint Research
• [Journal Article] Electronic band structure of Ti2O3 thin films studied by angle-resolved photoemission spectroscopy (2022)
  • Author(s): Hasegawa Naoto、Yoshimatsu Kohei、Shiga Daisuke、Kanda Tatsuhiko、Miyazaki Satoru、Kitamura Miho、Horiba Koji、Kumigashira Hiroshi
  • Journal Title: Physical Review B Volume: 105 Issue: 23 Pages: 1-8
  • DOI: 10.1103/physrevb.105.235137
  • Peer Reviewed
• [Journal Article] Intervalence charge transfer and charge transport in the spinel ferrite ferromagnetic semiconductor Ru-doped CoFe2O4 (2022)
  • Author(s): Masaki Kobayashi, Munetoshi Seki, Masahiro Suzuki, Ryo Okano, Miho Kitamura, Koji Horiba, Hiroshi Kumigashira, Atsushi Fujimori, Masaaki Tanaka, and Hitoshi Tabata
  • Journal Title: Phys. Rev. B Volume: 105 Issue: 20 Pages: 205103-205103
  • DOI: 10.1103/physrevb.105.205103
  • Peer Reviewed
• [Journal Article] Development of magnetism in Fe-doped magnetic semiconductors: Resonant photoemission and x-ray magnetic circular dichroism studies of (Ga,Fe)As (2022)
  • Author(s): Takeda Takahito、Sakamoto Shoya、Anh Le Duc、Takeda Yukiharu、Fujimori Shin-ichi、Kitamura Miho、Horiba Koji、Kumigashira Hiroshi、Fujimori Atsushi、Tanaka Masaaki、Kobayashi Masaki
  • Journal Title: Physical Review B Volume: 105 Issue: 19 Pages: 195155-195155
  • DOI: 10.1103/physrevb.105.195155
  • Peer Reviewed
• [Journal Article] Development of a versatile micro-focused ARPES system with Kirkpatrick-Baez mirror optics (2022)
  • Author(s): M. Kitamura, S. Souma, A. Honma, D. Wakabayashi, H. Tanaka, A. Toyoshima, K. Amemiya, T. Kawakami, K. Sugawara, K. Nakayama, K. Yoshimatsu, H. Kumigashira, T. Sato, K. Horiba
  • Journal Title: Review of Scientific Instruments Volume: 93 Issue: 3 Pages: 033906-033906
  • DOI: 10.1063/5.0074393
  • Peer Reviewed
• [Journal Article] Crystal Structure and Electronic Property Modification of Ca2RuO4 thin Films via Fluorine Doping (2022)
  • Author(s): S. Fukuma, A. Chikamatsu, T. Katayama, T. Maruyama, K. Yanagisawa , K. Kimoto, M. Kitamura, K. Horiba, H. Kumigashira, Y. Hirose, and T. Hasegawa
  • Journal Title: Phys. Rev. Mater. Volume: 6 Issue: 3 Pages: 035002-035002
  • DOI: 10.1103/physrevmaterials.6.035002
  • Peer Reviewed
• [Journal Article] Two-dimensional superconductivity in single-band correlated 2H-type NbO2 layers (2022)
  • Author(s): Soma Takuto、Yoshimatsu Kohei、Horiba Koji、Kumigashira Hiroshi、Ohtomo Akira
  • Journal Title: Physical Review B Volume: 105 Issue: 10 Pages: 104504-104504
  • DOI: 10.1103/physrevb.105.104504
  • Peer Reviewed
• [Journal Article] Synthesis of high-entropy layered oxide epitaxial thin films: LiCr1/6Mn1/6Fe1/6Co1/6Ni1/6Cu1/6O2 (2022)
  • Author(s): Kaidong Wang, Kazunori Nishio, Koji Horiba, Miho Kitamura, Kurei Edamura, Daisuke Imazeki, Ryo Nakayama, Ryota Shimizu, Hiroshi Kumigashira, Taro Hitosugi
  • Journal Title: Crystal Growth Design Volume: 22 Issue: 2 Pages: 1116-1122
  • DOI: 10.1021/acs.cgd.1c01076
  • Peer Reviewed
• [Journal Article] Resonant tunneling driven metal-insulator transition in double quantum-well structures of strongly correlated oxide (2021)
  • Author(s): Yukawa R.、Kobayashi M.、Kanda T.、Shiga D.、Yoshimatsu K.、Ishibashi S.、Minohara M.、Kitamura M.、Horiba K.、Santander-Syro A. F.、Kumigashira H.
  • Journal Title: Nature Communications Volume: 12 Issue: 1 Pages: 7070-7070
  • DOI: 10.1038/s41467-021-27327-z
  • Peer Reviewed / Open Access / Int'l Joint Research
• [Journal Article] Superconducting gap and pseudogap in the surface states of the iron-based superconductor PrFeAsO1－y studied by angle-resolved photoemission spectroscopy (2021)
  • Author(s): Hagiwara K.、Ishikado M.、Horio M.、Koshiishi K.、Nakata S.、Ideta S.、Tanaka K.、Horiba K.、Ono K.、Kumigashira H.、Yoshida T.、Ishida S.、Eisaki H.、Shamoto S.、Fujimori A.
  • Journal Title: Physical Review Research Volume: 3 Issue: 4
  • DOI: 10.1103/physrevresearch.3.043151
  • Peer Reviewed / Open Access
• [Journal Article] Dirac Semimetal Phase and Topological Phase Transition in XMg2Bi2 (X = Ba and Sr) (2021)
  • Author(s): Daichi Takane, Yuya Kubota, Kosuke Nakayama, Tappei Kawakami, Kunihiko Yamauchi, Seigo Souma, Takemi Kato, Katsuaki Sugawara, Shin-ichiro Ideta, Kiyohisa Tanaka, Miho Kitamura, Koji Horiba, Hiroshi Kumigashira, Tamio Oguchi, Takashi Takahashi, Kouji Segawa, and Takafumi Sato
  • Journal Title: Sci. Rep. Volume: 11 Issue: 1 Pages: 21937-21937
  • DOI: 10.1038/s41598-021-01333-z
  • Peer Reviewed / Open Access
• [Journal Article] Imaging the itinerant-to-localized transmutation of electrons across the metal-to-insulator transition in V2O3 (2021)
  • Author(s): Thees M、Lee Min-Han、Bouwmeester R L、Rezende-Gonalves Pedro H.、David E、Zimmers A、Fortuna F、Frantzeskakis E、Vargas Nicolas M.、Kalcheim Y、Le Fevre P、Horiba K、Kumigashira H、Biermann S、Trastoy J、Rozenberg Marcelo J.、Schuller Ivan K.、Santander-Syro A F.
  • Journal Title: Science Advances Volume: 7 Issue: 45
  • DOI: 10.1126/sciadv.abj1164
  • Peer Reviewed / Open Access / Int'l Joint Research
• [Journal Article] Crystalline boron monosulfide nanosheets with tunable bandgaps (2021)
  • Author(s): Kusaka Haruki、Ishibiki Ryota、Toyoda Masayuki、Tokunaga Tomoharu、Yamamoto Akiyasu、Miyakawa Masashi、Matsushita Kyosuke、Miyazaki Keisuke、Li Linghui、Shinde Satish Laxman、S. L. Lima Mariana、Sakurai Takeaki、Nishibori Eiji、Masuda Takuya、Horiba Koji、Watanabe Kenji、Taniguchi Takashi、Hosono Hideo、Kondo Takahiro
  • Journal Title: Journal of Materials Chemistry A Volume: 9 Issue: 43 Pages: 24631-24640
  • DOI: 10.1039/d1ta03307g
  • Peer Reviewed / Open Access / Int'l Joint Research
• [Journal Article] Epitaxial-Strain-Induced Spontaneous Magnetization in Polar Mn2Mo3O8 (2021)
  • Author(s): Mo Shishin、Katayama Tsukasa、Chikamatsu Akira、Kitamura Miho、Horiba Koji、Kumigashira Hiroshi、Hasegawa Tetsuya
  • Journal Title: Chemistry of Materials Volume: 33 Issue: 19 Pages: 7713-7718
  • DOI: 10.1021/acs.chemmater.1c01877
  • Peer Reviewed
• [Journal Article] Large magnetoresistance of a compensated metal Cu2Sb correlated with its Fermi surface topology (2021)
  • Author(s): Endo Mizuki、Kawasoko Hideyuki、Soma Seigo、Yamauchi Kunihiko、Kitamura Miho、Horiba Koji、Kumigashira Hiroshi、Kimura Noriaki、Oguchi Tamio、Sato Takafumi、Fukumura Tomoteru
  • Journal Title: Physical Review Materials Volume: 5 Issue: 10
  • DOI: 10.1103/physrevmaterials.5.105002
  • Peer Reviewed
• [Journal Article] Local polarization and valence distribution in LaNiO3/LaMnO3 heterostructures (2021)
  • Author(s): Anada Masato、Sakaguchi Satoshi、Nagai Kazuki、Kitamura Miho、Horiba Koji、Kumigashira Hiroshi、Wakabayashi Yusuke
  • Journal Title: Physical Review B Volume: 104 Issue: 8
  • DOI: 10.1103/physrevb.104.085111
  • Peer Reviewed
• [Journal Article] Electronic structure of 3°-twisted bilayer graphene on 4H-SiC(0001) (2021)
  • Author(s): Takushi Iimori, Anton Visikovskiy, Hitoshi Imamura, Toshio Miyamachi, Miho Kitamura, Koji Horiba, Hiroshi Kumigashira, Kazuhiko Mase, Kan Nakatsuji, Satoru Tanaka, Fumio Komori
  • Journal Title: Physical Review Materials Volume: 5 Issue: 5
  • DOI: 10.1103/physrevmaterials.5.l051001
  • Peer Reviewed
• [Journal Article] Total reflection hard x-ray photoelectron spectroscopy: Applications to strongly correlated electron systems (2021)
  • Author(s): T. Mizutani, S. Tanaka, T. Saze, K. Fujii, H. Matsuoka, M. Nakano, H. Wadati, M. Kitamura, K. Horiba, Y. Iwasa, H. Kumigashira, M. Yoshiki, M. Taguchi
  • Journal Title: Physical Review B Volume: 103 Issue: 20 Pages: 205113-205113
  • DOI: 10.1103/physrevb.103.205113
  • Peer Reviewed
• [Journal Article] Investigation of the electronic states of A-site layer-ordered double perovskite YBaCo2Ox (x = 5.3 and 6) thin films by x-ray spectroscopy (2021)
  • Author(s): Chikamatsu Akira、Katayama Tsukasa、Maruyama Takahiro、Kitamura Miho、Horiba Koji、Kumigashira Hiroshi、Wadati Hiroki、Hasegawa Tetsuya
  • Journal Title: Applied Physics Letters Volume: 118 Issue: 1 Pages: 012401-012401
  • DOI: 10.1063/5.0031096
  • Peer Reviewed
• [Journal Article] Transport properties and electronic structure of fluorine-doped SnO2 prepared by ultrasonic assisted mist deposition (2021)
  • Author(s): Sakai Enju、Tsutsumi Naoya、Horiba Koji、Kumigashira Hiroshi、Tsuji Yoshiko
  • Journal Title: Journal of Electron Spectroscopy and Related Phenomena Volume: 247 Pages: 147041-147041
  • DOI: 10.1016/j.elspec.2020.147041
  • Peer Reviewed
• [Journal Article] High-Quality Few-Layer Graphene on Single-Crystalline SiC thin Film Grown on Affordable Wafer for Device Applications (2021)
  • Author(s): Endoh Norifumi、Akiyama Shoji、Tashima Keiichiro、Suwa Kento、Kamogawa Takamasa、Kohama Roki、Funakubo Kazutoshi、Konishi Shigeru、Mogi Hiroshi、Kawahara Minoru、Kawai Makoto、Kubota Yoshihiro、Ohkochi Takuo、Kotsugi Masato、Horiba Koji、Kumigashira Hiroshi、Suemitsu Maki、Watanabe Issei、Fukidome Hirokazu
  • Journal Title: Nanomaterials Volume: 11 Issue: 2 Pages: 392-392
  • DOI: 10.3390/nano11020392
  • Peer Reviewed / Open Access
• [Journal Article] Low resistance at LiNi1/3Mn1/3Co1/3O2 and Li3PO4 interfaces (2020)
  • Author(s): Nishio Kazunori、Nakamura Naoto、Horiba Koji、Kitamura Miho、Kumigashira Hiroshi、Shimizu Ryota、Hitosugi Taro
  • Journal Title: Applied Physics Letters Volume: 116 Issue: 5 Pages: 053901-053901
  • DOI: 10.1063/1.5133879
  • Peer Reviewed
• [Journal Article] Tunable two-dimensional electron system at the (110) surface of SnO2 (2020)
  • Author(s): J. Dai, E. Frantzeskakis, F. Fortuna, P. Lomker, R. Yukawa, M. Thees, S. Sengupta, P. Le Fevre, F. Bertran, J. E. Rault, K. Horiba, M. Muller, H. Kumigashira, and A. F. Santander-Syro
  • Journal Title: Physical Review B Volume: 101 Issue: 8 Pages: 0851211-7
  • DOI: 10.1103/physrevb.101.085121
  • Peer Reviewed / Int'l Joint Research
• [Journal Article] Surface Proton Conduction of Sm-Doped CeO2-δ Thin Film Preferentially Grown on Al2O3 (0001) (2020)
  • Author(s): Nishioka D、Tsuchiya T、Namiki W、Takayanagi M、Kawamura K、Fujita T、Yukawa R、Horiba K、Kumigashira H、Higuchi T.
  • Journal Title: Nanoscale Research Letters Volume: 15 Issue: 1 Pages: 421-8
  • DOI: 10.1186/s11671-020-3267-5
  • Peer Reviewed
• [Journal Article] Electronic properties of perovskite strontium chromium oxyfluoride epitaxial thin films fabricated via low-temperature topotactic reaction (2020)
  • Author(s): Chikamatsu Akira、Maruyama Takahiro、Katayama Tsukasa、Su Yu、Tsujimoto Yoshihiro、Yamaura Kazunari、Kitamura Miho、Horiba Koji、Kumigashira Hiroshi、Hasegawa Tetsuya
  • Journal Title: Physical Review Materials Volume: 4 Issue: 2 Pages: 1-6
  • DOI: 10.1103/physrevmaterials.4.025004
  • Peer Reviewed / Open Access / Int'l Joint Research
• [Journal Article] Anomalous Hall effect at the spontaneously electron-doped polar surface of PdCoO2 ultrathin films (2020)
  • Author(s): Harada T.、Sugawara K.、Fujiwara K.、Kitamura M.、Ito S.、Nojima T.、Horiba K.、Kumigashira H.、Takahashi T.、Sato T.、Tsukazaki A.
  • Journal Title: Physical Review Research Volume: 2 Issue: 1 Pages: 1-6
  • DOI: 10.1103/physrevresearch.2.013282
  • Peer Reviewed / Open Access
• [Journal Article] Switching of band inversion and topological surface states by charge density wave (2020)
  • Author(s): Mitsuishi N.、Sugita Y.、Bahramy M. S.、Kamitani M.、Sonobe T.、Sakano M.、Shimojima T.、Takahashi H.、Sakai H.、Horiba K.、Kumigashira H.、Taguchi K.、Miyamoto K.、Okuda T.、Ishiwata S.、Motome Y.、Ishizaka K.
  • Journal Title: Nature Communications Volume: 11 Issue: 1 Pages: 24661-9
  • DOI: 10.1038/s41467-020-16290-w
  • Peer Reviewed / Open Access / Int'l Joint Research
• [Journal Article] Influence of oxygen vacancies on magnetic properties of perpendicularly magnetized NiCo2O4 epitaxial thin films (2020)
  • Author(s): Suzuki Ikumi、Kan Daisuke、Kitamura Miho、Shen Yufan、Horiba Koji、Shimakawa Yuichi
  • Journal Title: Journal of Applied Physics Volume: 127 Issue: 20 Pages: 203903-203903
  • DOI: 10.1063/5.0008173
  • Peer Reviewed / Int'l Joint Research
• [Journal Article] Electronic structure of a (3×3)-ordered silicon layer on Al(111) (2020)
  • Author(s): Sato Yusuke、Fukaya Yuki、Cameau Mathis、Kundu Asish K.、Shiga Daisuke、Yukawa Ryu、Horiba Koji、Chen Chin-Hsuan、Huang Angus、Jeng Horng-Tay、Ozaki Taisuke、Kumigashira Hiroshi、Niibe Masahito、Matsuda Iwao
  • Journal Title: Physical Review Materials Volume: 4 Issue: 6 Pages: 0640051-6
  • DOI: 10.1103/physrevmaterials.4.064005
  • Peer Reviewed / Open Access / Int'l Joint Research
• [Journal Article] Insulator-to-Metal Transition of Cr2O3 Thin Films via Isovalent Ru3+ Substitution (2020)
  • Author(s): Fujiwara Kohei、Kitamura Miho、Shiga Daisuke、Niwa Yasuhiro、Horiba Koji、Nojima Tsutomu、Ohta Hiromichi、Kumigashira Hiroshi、Tsukazaki Atsushi
  • Journal Title: Chemistry of Materials Volume: 32 Issue: 12 Pages: 5272-5279
  • DOI: 10.1021/acs.chemmater.0c01497
  • Peer Reviewed
• [Journal Article] Influence of fluorination on electronic states and electron transport properties of Sr2IrO4 thin films (2020)
  • Author(s): Maruyama Takahiro、Chikamatsu Akira、Katayama Tsukasa、Kuramochi Kenta、Ogino Hiraku、Kitamura Miho、Horiba Koji、Kumigashira Hiroshi、Hasegawa Tetsuya
  • Journal Title: Journal of Materials Chemistry C Volume: 8 Issue: 24 Pages: 8268-8274
  • DOI: 10.1039/d0tc01734e
  • Peer Reviewed
• [Journal Article] Spin and orbital magnetic moments in perpendicularly magnetized Ni1-xCo2+yO4-z epitaxial thin films: Effects of site-dependent cation valence states (2020)
  • Author(s): Kan Daisuke、Mizumaki Masaichiro、Kitamura Miho、Kotani Yoshinori、Shen Yufan、Suzuki Ikumi、Horiba Koji、Shimakawa Yuichi
  • Journal Title: Physical Review B Volume: 101 Issue: 22 Pages: 2244341-6
  • DOI: 10.1103/physrevb.101.224434
  • Peer Reviewed / Int'l Joint Research
• [Journal Article] Impact of the Crystal Orientation of Positive Electrodes on the Interface Resistance across a Solid Electrolyte and Electrode (2020)
  • Author(s): Nishio Kazunori、Nakamura Naoto、Horiba Koji、Kitamura Miho、Kumigashira Hiroshi、Shimizu Ryota、Hitosugi Taro
  • Journal Title: ACS Applied Energy Materials Volume: 3 Issue: 7 Pages: 6416-6421
  • DOI: 10.1021/acsaem.0c00644
  • Peer Reviewed / Open Access
• [Journal Article] Observation of inverted band structure in the topological Dirac semimetal candidate CaAuAs (2020)
  • Author(s): Nakayama Kosuke、Wang Zhiwei、Takane Daichi、Souma Seigo、Kubota Yuya、Nakata Yuki、Cacho Cephise、Kim Timur、Ekahana Sandy Adhitia、Shi Ming、Kitamura Miho、Horiba Koji、Kumigashira Hiroshi、Takahashi Takashi、Ando Yoichi、Sato Takafumi
  • Journal Title: Physical Review B Volume: 102 Issue: 4 Pages: 1-5
  • DOI: 10.1103/physrevb.102.041104
  • Peer Reviewed / Int'l Joint Research
• [Journal Article] Molecular beam epitaxy growth of the highly conductive oxide SrMoO3 (2020)
  • Author(s): H. Takatsu, N. Yamashina, D. Shiga, R. Yukawa, K. Horiba, H. Kumigashira, T. Terashima, H. Kageyama
  • Journal Title: J. Cryst. Growth Volume: in press Pages: 125685-125685
  • DOI: 10.1016/j.jcrysgro.2020.125685
  • Peer Reviewed
• [Journal Article] Thickness dependence of electronic structures in VO2 ultrathin films: Suppression of the cooperative Mott-Peierls transition (2020)
  • Author(s): Shiga D.、Yang B. E.、Hasegawa N.、Kanda T.、Tokunaga R.、Yoshimatsu K.、Yukawa R.、Kitamura M.、Horiba K.、Kumigashira H.
  • Journal Title: Physical Review B Volume: 102 Issue: 11 Pages: 115114-115114
  • DOI: 10.1103/physrevb.102.115114
  • Peer Reviewed
• [Journal Article] Polarity reversal of the charge carrier in tetragonal TiHx(x=1.6-2.0) at low temperatures (2020)
  • Author(s): Shimizu Ryota、Sasahara Yuki、Hamada Ikutaro、Oguchi Hiroyuki、Ogura Shohei、Shirasawa Tetsuroh、Kitamura Miho、Horiba Koji、Kumigashira Hiroshi、Orimo Shin-ichi、Fukutani Katsuyuki、Hitosugi Taro
  • Journal Title: Physical Review Research Volume: 2 Issue: 3 Pages: 0334671-9
  • DOI: 10.1103/physrevresearch.2.033467
  • Peer Reviewed / Open Access
• [Presentation] Design for nano-ARPES beamline at 3-GeV next-generation synchrotron radiation facility (2021)
  • Author(s): K. Horiba, T. Imazono, H. Iwasawa, K. Fujii, Jun Miyawaki, Y. Ohtsubo, T. Nakatani, A. Agui, H. Kimura, and M. Takahasi
  • Organizer: 14th International Conference on Synchrotron Radiation Instrumentation (SRI2021)
  • Int'l Joint Research
• [Presentation] PFにおけるマイクロARPES装置の開発と応用 (2021)
  • Author(s): 堀場弘司
  • Organizer: 2020年度量子ビームサイエンスフェスタ（招待講演）
  • Invited