Basic Information

Faculty

• Faculty of Engineering

Email Address

• Email Address

  obata.yukiko.7wkyoto-u.ac.jp

Professional Memberships

• THE PHYSICAL SOCIETY OF JAPAN
• American Physical Society

Academic Degree

• 26 Mar. 2015

  東京工業大学修士（理学）
• 26 Mar. 2018

  東京工業大学博士（理学）

Academic Resume (Undergraduate School/Majors)

• Soka University of America, Liberal Arts Major, Humanities Concentration, 卒業
• お茶の水女子大学, 理学部物理学科（３学年編入）, 卒業

Research History

• From Apr. 2025, To Present

  Kyoto University, Graduate School of Engineering Department of Material Chemistry, Assistant Professor
• From May 2023, To Mar. 2025

  Kanazawa University, Institute of Science and Engineering Faculty of Mathematics and Physics, Specially Appointed Assistant Professor
• From May 2022, To Apr. 2023

  Okinawa Institute of Science and Technology Graduate University, Quantum Materials Science Unit (Okada Unit), Postdoctoral Scholar
• From Oct. 2019, To Mar. 2022

  東京工業大学 科学技術創成研究院, Tokyo Tech World Research Hub Initiative (WRHI), 特任助教
• From Apr. 2018, To Sep. 2019

  High Energy Accelerator Research Organization, 博士研究員

ID,URL

• ORCID ID

  0000-0002-9949-2273

• J-Global ID

  201801014185418498

• Researcher ID

  AAG-1261-2019

• Researcher number

  70826255

researchmap URL

• https://researchmap.jp/yobata

Research

Research Interests

• 固体物性、物質科学、物質合成、薄膜界面、光電子分光、量子振動、超伝導

Research Areas

• Natural sciences, Magnetism, superconductivity, and strongly correlated systems, トポロジカル物質
• Nanotechnology/Materials, Thin-film surfaces and interfaces

Papers

• Large low-field magnetocaloric effect in layered perovskite Eu2TiO4

  Yang Zhang; Natsu Shibamori; Yukiko Obata; Wei Yi; Koji Fujita

  Japanese Journal of Applied Physics, 15 Oct. 2026, Peer-reviewed

  
• Emergent Chirality from Pairing of Achiral Molecules: Homochiral Chains of Paired 1,10‐Phenanthroline on Au(111)

  Erlina Tik Man; Yuya Kaneko; Ryunosuke Kobata; Muhammad Alief Irham; Takaya Shimokawa; Tzu‐Yen Chen; Yukiko Obata; Kazutoshi Shimamura; Kenji Hayashida; Kotaro Takeyasu; Taro Koide; Sasfan Arman Wella; Junji Nakamura; Yasuo Yoshida

  Advanced Materials Interfaces, Mar. 2026, Peer-reviewed

  
• Frustration-driven correlated parent states in the spinel superconductor LiTi2⁢O4

  Yuita Fujisawa; Anjana Krishnadas; Chia-Hsiu Hsu; Takahito Takeda; Sheng Liu; Markel Pardo-Almanza; Yukiko Obata; Dyon van Dinter; Tomonori Nakamura; Kohei Yamagami; Guoqing Chang; Masaki Kobayashi; Chang-Yang Kuo; Yoshinori Okada

  Physical Review Research, 04 Feb. 2026, Peer-reviewed

  
• STEM/EELS investigation of lattice matching and interface properties of Mn/MgO thin films

  Akihide Moriyama; Yukiko Obata; Kazutoshi Shimamura; Koichi Higashimine; Yasuo Yoshida

  Japanese Journal of Applied Physics, 01 Dec. 2025, Peer-reviewed, Corresponding author

  
• Preparation of nanoparticles of heavy-fermion superconductor CeCoIn5 by pulsed laser ablation in liquid

  Yukiko Obata; Hiro Takada; Ruma Usami; Rintaro Ninomiya; Dasom Kim; Naoki Takata; Yoji Miyajima; Yasuo Yoshida

  Japanese Journal of Applied Physics, 01 Sep. 2025, Peer-reviewed, Lead author, Corresponding author

  
• Significant electron filling imbalance between chains and planes at the surface of Ca-doped YBa2Cu3O7−x films

  Anjana Krishnadas; Yuita Fujisawa; Markel Pardo-Almanza; Yukiko Obata; Kohei Yamagami; Yoshinori Okada

  Physical Review B, 12 May 2025, Peer-reviewed

  
• Universal Waterfall Feature in Cuprate Superconductors: Evidence of a Momentum-Driven Crossover

  Benjamin Bacq-Labreuil; Chafic Fawaz; Yuichi Okazaki; Yukiko Obata; Hervé Cercellier; Patrick Le Fèvre; François Bertran; David Santos-Cottin; Hajime Yamamoto; Ikuya Yamada; Masaki Azuma; Koji Horiba; Hiroshi Kumigashira; Matteo d’Astuto; Silke Biermann; Benjamin Lenz

  Physical Review Letters, 09 Jan. 2025, Peer-reviewed

  
• Chemical Composition Control at the Substrate Interface as the Key for FeSe Thin-Film Growth

  Yukiko Obata; Michiko Sato; Yuji Kondo; Yuta Yamaguchi; Igor A. Karateev; Ivan Pavlov; Alexander L. Vasiliev; Silvia Haindl

  ACS Applied Materials & Interfaces, 26 Oct. 2021, Peer-reviewed, Lead author, Corresponding author

  
• Challenges for Pulsed Laser Deposition of FeSe Thin Films

  Yukiko Obata; Igor A. Karateev; Ivan Pavlov; Alexander L. Vasiliev; Silvia Haindl

  Micromachines, 07 Oct. 2021, Peer-reviewed, Lead author, Corresponding author

  
• Natural van der Waals heterostructural single crystals with both magnetic and topological properties

  Jiazhen Wu; Fucai Liu; Masato Sasase; Koichiro Ienaga; Yukiko Obata; Ryu Yukawa; Koji Horiba; Hiroshi Kumigashira; Satoshi Okuma; Takeshi Inoshita; Hideo Hosono

  Science Advances, Nov. 2019, Peer-reviewed

  
• Electronic structure of a monoatomic Cu2Si layer on a Si(111) substrate

  M. Cameau; R. Yukawa; C.-H. Chen; A. Huang; S. Ito; R. Ishibiki; K. Horiba; Y. Obata; T. Kondo; H. Kumigashira; H.-T. Jeng; M. D'angelo; I. Matsuda

  PHYSICAL REVIEW MATERIALS, 24 Apr. 2019, Peer-reviewed

  
• Shubnikov-de Haas oscillations in the three-dimensional Dirac fermion system Ca3PbO

  Yukiko Obata; Yoshimitsu Kohama; Satoru Matsuishi; Hideo Hosono

  Physical Review B, 22 Mar. 2019, Peer-reviewed, Lead author

  
• 

  Insulator-like behavior coexisting with metallic electronic structure in strained FeSe thin films grown by molecular beam epitaxy

  Kota Hanzawa; Yuta Yamaguchi; Yukiko Obata; Satoru Matsuishi; Hidenori Hiramatsu; Toshio Kamiya; Hideo Hosono

  PHYSICAL REVIEW B, 24 Jan. 2019, Peer-reviewed

  
• Flux growth and magneto-transport properties of cubic antiperovskite Ca3PbO single crystals

  Yukiko Obata; Satoru Matsuishi; Hideo Hosono

  Materials Research Bulletin, 01 Oct. 2018, Peer-reviewed, Lead author

  
• ARPES studies of the inverse perovskite Ca3PbO: Experimental confirmation of a candidate 3D Dirac fermion system

  Yukiko Obata; Ryu Yukawa; Koji Horiba; Hiroshi Kumigashira; Yoshitake Toda; Satoru Matsuishi; Hideo Hosono

  PHYSICAL REVIEW B, Oct. 2017, Peer-reviewed, Lead author

  

Presentations

• Long-Range Superconducting Proximity Effect and Interface Evaluation in Mn/FeSe Heterojunction

  森山曉栄; 強瀬惠太; 島村一利; 小畑由紀子; 吉田靖雄

  The Physical Society of Japan 2026 Annual (81th) Meeting, 16 Sep. 2026

  
• VUV-ARPES study on the antiferromagnetic semiconductor GdGaI

  藤澤唯太; 大熊隆太郎; 長澤啓太; 有田将司; 山神光平; 小畑由紀子; Y. Kumar; 出田真一郎; 島田賢也; 岡田佳憲

  The Physical Society of Japan 2026 Annual (81th) Meeting, 16 Sep. 2026

  
• Can magnetic excitons form a skyrmion crystal in GdGaI?

  大熊隆太郎; 池野辺寿弥; 山神光平; 藤澤唯太; 小畑由紀子; 中村友謙; Hank Wu; 石塚大晃; 諏訪秀麿; 赤城裕; 金子竜也; 長澤啓太; 山浦淳一; 岡本佳比古; 齋藤開; 植田大地; Stephen Blundell; 井原慶彦; 中島多朗; 岡田佳憲

  The Physical Society of Japan 2026 Annual (81th) Meeting, 16 Sep. 2026

  
• Soft-X-ray ARPES of the antiferromagnetic vdW semiconductor GdGaI: enhanced interlayer electronic coherence

  Y. ObataA.; K. YamagamiB.; Y. FujisawaC.; N. TomodaD.; R. OkumaE,F.; Y. OkadaD,F.

  The Physical Society of Japan 2026 Annual (81th) Meeting, 16 Sep. 2026

  
• Fabrication of Mn/FeSe/MgO thin films for long-range proximity effect

  強瀬惠太; 森山曉栄; 島村一利; 小畑由紀子; 吉田靖雄

  The Physical Society of Japan 2026 Annual (81th) Meeting, 15 Sep. 2026

  
• Magnetization of the Heavy-Fermion Superconductor Nd1-xCexCoIn5 Coexisting with Magnetism Measured at Ultra-Low Temperatures Using a 3He Cryostat

  R. Usami; H. Takada; Y. Obata; K. Shimamura; Y. Yoshida

  The Physical Society of Japan 2026 Annual (81th) Meeting, 14 Sep. 2026

  
• STEM/EELS investigation of lattice matching and interface properties of Mn/MgO thin films

  Akihide Moriyama; Yukiko Obata; Kazutoshi Shimamura; Koichi Higashimine; Yasuo Yoshida

  2026年 第73回 応用物理学会 春季学術講演会, 18 Mar. 2026

  
• Observation of anisotropic standing wave patterns on 1,10- phenanthroline thin films formed on Au(111)

  Y. Kaneko; R. Kobata; T. Shimokawa; E. Tik Man; Y. Obata; J. Nakamura; Y. Yoshida

  33rd International Colloquium on Scanning Probe Microscopy, 12 Dec. 2025

  
• Enhancement of superconducting transition temperature induced by charge density wave disorder in layered superconductor NbTe2

  下川 貴也; 小畑由 紀子; 兼子 裕矢; 高田 洸; 佐藤 魁斗; 牧野 隼士; 島村 一利; 岡本 博之; 大橋 政司; 小幡 正雄; 小田 竜樹; 吉田 靖雄

  The Physical Society of Japan 2025 Annual (80th) Meeting, 18 Sep. 2025

  
• Observation of the Coexistence of Superconductivity and Magnetism in Nd0.95Ce0.95CoIn₅ by Ultra-Low-Temperature Magnetization Measurements

  H. Takada; R. Usami; Y. Obata; K. Shimamura; Y. Yoshida

  The Physical Society of Japan 2025 Annual (80th) Meeting, 18 Sep. 2025

  
• Laser Ablation Synthesis and Characterization of CeCoIn5 Nanoparticles

  R. Usami; H. Takada; R.Ninomiya; D. Kim; N. Takata; Y. Miyajima; Y. Obata; Y. Yoshida

  The Physical Society of Japan 2025 Annual (80th) Meeting, 16 Sep. 2025

  
• Study of Chiral Structures Formed by 1,10-Phenanthroline Molecules on Au(111) Surface Using Low-Temperature STM

  Y. Kaneko; E. Tik Man; R. Kobata; T. Shimokawa; H. Aso; T. Cheng; Y. Obata; M. Alief Irham; S. Arman Wella; K. Hayashida; K. Takeyasu; J. Nakamura; Y. Yoshida

  The Physical Society of Japan 2025 Annual (80th) Meeting, 16 Sep. 2025

  
• Thickness Dependence of Long-Range Superconducting Proximity Effect in Mn/FeSe Heterojunction

  A. Moriyama; Y. Obata; K. Shimamura; Y. Yoshida

  The Physical Society of Japan 2025 Annual (80th) Meeting, 16 Sep. 2025

  
• Relationship between superconducting transition temperature and charge density wave in layered superconductor NbTe2

  Takaya Shimokawa; Yukiko Obata; Yuya Kaneko; Hiro Takada; Kaito Sato; Hayato Makino; Kazutoshi Shimamura; Hiroyuki Okamoto; Masashi Ohashi; Masao Obata; Tatsuki Oda; Yasuo Yoshida

  30th International Conference on Low Temperature Physics, 11 Aug. 2025

  
• Fabrication of Mn/FeSe Heterostructures for Long-Range Superconducting Proximity Effects Observation

  Akihide Moriyama; Yukiko Obata; Kazutoshi Shimamura; Yasuo Yoshida

  NANO KOREA 2025 - The 23rd International Nano Technology Exhibition

  
• Low-temperature scanning tunneling microscopy and spectroscopy of 1,10-phenanthroline molecules on Au(111) surface

  Y. Kaneko; E. Tik Man; R. Kobata; T. Shimokawa; T. Cheng; Y. Obata; K. Shimamura; K.Hayashida; M. Alief Irham; S. Arman; K. Takeyasu; J. Nakamura; Yasuo Yoshida

  STM'25, 26 Jun. 2025

  
• Enhancement of superconductivity by charge density wave disorder in layered superconductor NbTe2

  Takaya Shimokawa; Yukiko Obata; Yuya Kaneko; Hiro Takada; Kaito Sato; Hayato Makino; Kazutoshi Shimamura; Hiroyuki Okamoto; Masashi Ohashi; Masao Obata; Tatsuki Oda; Yasuo Yoshida

  STM'25

  
• Interface Control by Fe buffer Layers in FeSe/MgO heterostructure

  Yukiko Obata; Igor Karateev; Alexander Vasiliev; Akihide Moriyama; Yasuo Yoshida; Silvia Haindl

  Czech-Japan Workshop on Quantum Technologies, 29 May 2025, Invited

  
• Fabrication of d-wave superconducting probes using cuprate superconductor Bi2Sr2CaCu2O8+δ

  T. Shimokawa; Y. Obata; T. An; T. Kashiwagi; Y. Yoshida

  Annual Meeting of Hokuriku Branch of JPS in 2024, 30 Nov. 2024

  
• 1,10-Phenanthroline Researched by Low-Temperature Scanning Tunneling Microscope

  Y. Kaneko; E. Tik Man; R. Kobata; T. Cheng; Y. Obata; K. Shimamura; K. Hayashida; K. Takeyasu; J. Nakamura; Y. Yoshida

  Annual Meeting of Hokuriku Branch of JPS in 2024, 30 Nov. 2024

  
• Observation of Long-Range Superconducting Proximity Effect in Mn/FeSe Heterojunction

  A. Moriyama; Y. Obata; K. Shimamura; Y. Yoshida

  Annual Meeting of Hokuriku Branch of JPS in 2024, 30 Nov. 2024

  
• Interface Control by Fe buffer Layers in FeSe/MgO heterostructure

  Yukiko Obata; Igor Karateev; Alexander Vasiliev; Akihide Moriyama; Yasuo Yoshida; Silvia Haindl

  Synchrotron radiation research workshop in Toyama, 28 Nov. 2024, Invited

  
• Mn/FeSeヘテロ接合における長距離近接効果の観察

  森山曉栄; 小畑由紀子; 島村一利; 吉田靖雄

  日本物理学会第79回年次大会, 18 Sep. 2024

  
• MPMS用小型3He冷凍機を用いた単結晶Nd1-xCexCoIn5の極低温磁化測定

  高田洸; 小畑由紀子; 島村一利; 吉田靖雄

  日本物理学会第79回年次大会, 18 Sep. 2024

  
• 走査トンネル顕微鏡によるモデル触媒分子1,10-フェナントロリンの研究

  兼子裕矢; Erlina Tik Man; 小畑龍之介; Tzu-Yen Cheng; 小畑由紀子; 島村一利; 林田健志; 武安光太郎; 中村潤児; 吉田靖雄

  日本物理学会第79回年次大会, 16 Sep. 2024

  
• 面内強磁場印加型の希釈冷凍機STMの開発

  佐藤魁和; 高橋駿哉; 前川洋輝; 小畑由紀子; 島村一利; 土師将裕; 長谷川幸雄; 河江達也; 吉田靖雄

  日本物理学会第79回年次大会, 16 Sep. 2024

  
• 銅酸化物超伝導体Bi2Sr2-xCaCu2O8+δを用いたd波超伝導探針の作製

  下川貴也; 小畑由紀子; 安東秀; 柏木隆成; 吉田靖雄

  日本物理学会第79回年次大会, 16 Sep. 2024

  
• 低温走査トンネル顕微鏡を用いたモデル触媒分子1,10-フェナントロリンの研究

  小畑龍之介; Erlina Tik Man; 兼子裕矢; Tzu-Yen Cheng; 小畑由紀子; 島村一利; 林田健志; 武安光太郎; 中村潤児; 吉田靖雄

  日本物理学会第79回年次大会, 16 Sep. 2024

  
• 層状超伝導体NbTe2における 結晶性の乱れによる超伝導転移温度の上昇

  下川 貴也; 牧野 隼士; 佐藤 魁和; 島村 一利; 小畑 由紀子; 岡本 博之; 吉田 靖雄

  日本物理学会北陸支部定例学術講演会, 02 Dec. 2023

  
• 超伝導と磁性が共存したFeTe1-xSexの低温STM観察

  兼子裕矢; 小畑龍之介; 前川洋輝; 下川貴也; 森山曉栄; Erlina Tik Man; 小畑由紀子; 藤井武則; 渡辺孝夫; 吉田靖雄

  日本物理学会第78回年次大会, 18 Sep. 2023

  
• 絶縁体基板上に蒸着させたMn薄膜の界面観察

  森山曉栄; 島村一利; Nona Avena Purba; 小畑由紀子; 吉田靖雄

  日本物理学会第78回年次大会, 16 Sep. 2023

  
• Interface-enhanced Superconductivity in Monolayer FeSe on SrVO3 (SVO)

  Dyon Van Dinter; Markel Pardo Almanza; Anjana Krishnadas; Yukiko Obata; Keita Harada; Yuita Fujisawa; Yoshinori Okada

  International Conference on Strongly Correlated Electron Systems 2023, Jul. 2023

  
• Revealing the band folding in YBa2Cu3O7-d films with calcium doping by ARPES

  Anjana Krishnadas; Yuita. Fujisawa; Markel Pardo-Almanza; Kohei Yamagami; Yukiko Obata; Yoshinori Okada

  International Conference on Strongly Correlated Electron Systems 2023, Jul. 2023

  
• Visualization of vortex configuration on a spinel oxide superconductor LiTi2O4 by STM/STS

  藤澤唯太、A. Krishnadas、B. R. M. Smith、M. Pardo-Almanza、小畑由紀子, 岡田佳憲

  日本物理学会2022年秋季大会, 15 Sep. 2022

  
• STM/STS of Two-Dimensional Topological Insulator Candidate HfZrTe4

  Y. Obata; Y. Fujisawa; Y. Hasuo; T. Urata; H. Ikuta; Y. Okada

  JPS 2022 Autumn Meeting, 13 Sep. 2022

  
• Investigation of Novel Low Temperature Phases in CeTe3 by STM/STS

  B. R. M. Smith; Y. Fujisawa; Y. Obata; N. Tomoda; D. Ueta; Y. Okada

  日本物理学会2022年秋季大会, 12 Sep. 2022

  
• Chemical Composition and its Control at the FeSe/MgO Interface

  Yukiko Obata; Michiko Sato; Yuji Kondo; Yuta Yamaguchi; Igor Karateev; Alexander Vasiliev; Silvia Haindl

  7th International Conference on Superconductivity and Magnetism, 25 Oct. 2021

  
• Chemical composition control at the substrate interface as the key for FeSe thin film growth

  Yukiko Obata; Michiko Sato; Yuji Kondo; Yuta Yamaguchi; Igor Karateev; Alexander Vasiliev; Silvia Haindl

  International Meeting on Thin Film Interfaces and Composite Crystals, 25 Jan. 2021, Invited

  
• Fermi surface in the three-dimensional Dirac fermion system Ca3Pb1-xBixO

  Yukiko Obata; Ryu Yukawa; Koji Horiba; Hiroshi Kumigashiraa; Yoshimitsu Kohama; Yoshitake Toda; Satoru Matsuishi; Hideo Hosono

  26th International Workshop on Oxides Electronics, 01 Oct. 2019

  
• The existence of three-dimensional Dirac-like cone in Ca3Pb1-xBixO

  Yukiko Obata; Ryu Yukawa; Koji Horiba; Hiroshi Kumigashira; Yoshimitsu Kohama; Yoshitake Toda; Satoru Matsuishi; Hideo Hosono

  14th International Conference on Atomically Controlled Surfaces, Interfaces and Nanostructures (ACSIN-14), 21 Oct. 2018

  
• Angle-Resolved Photoemission Spectroscopy and Shubnikov-de Haas Measurements of Ca3Pb1-xBixO

  Yukiko Obata; Ryu Yukawa; Koji Horiba; Hiroshi Kumigashira; Yoshimitsu Kohama; Yoshitake Toda; Satoru Matsuishi; Hideo Hosono

  American Physical Society March Meeting, 05 Mar. 2018

  
• Ca3Pb1-XBiXOの角度分解光電子分光

  小畑由紀子; 湯川龍; 堀場弘司; 組頭広志; 戸田喜丈; 松石聡; 細野秀雄

  第11回 物性科学領域横断研究会（領域合同研究会）, 17 Nov. 2017

  
• Effects of Bi Substitution on Transport Properties of Ca3Pb1-xBixO Single Crystals

  Yukiko Obata; Satoru Matsuishi; Hideo Hosono

  The 10th International Conference on the Science and Technology for Advanced Ceramics (STAC-10), 01 Aug. 2017

  
• Ca3PbOの軟X線角度分解光電子分光

  小畑由紀子; 湯川龍; 堀場弘司; 組頭広志; 松石聡; 戸田喜丈; 細野秀雄

  日本物理学会 第72回年次大会, 17 Mar. 2017

  
• Ca3PbOの輸送特性とバルク敏感光電子分光

  小畑由紀子; 上田茂典; 松石聡; 戸田喜丈; 細野秀雄

  日本物理学会 第71回年次大会, 19 Mar. 2016

  

External funds: Kakenhi

• 鉄系超伝導体FeSeと磁性薄膜ヘテロ界面におけるスピン偏極した超伝導状態の実現

  Grant-in-Aid for Scientific Research (C)

  Basic Section 13030:Magnetism, superconductivity and strongly correlated systems-related

  Kanazawa University

  小畑 由紀子

  From 01 Apr. 2024, To 31 Mar. 2027, Granted

  薄膜作製;ヘテロ界面;鉄系超伝導;磁性

  https://kaken.nii.ac.jp/grant/KAKENHI-PROJECT-24K06955/
• Visualization of pair density waves in field-tolerant superconducting states with an ultra-low-temperature and in-plane high magnetic field STM

  Grant-in-Aid for Scientific Research (B)

  Basic Section 29020:Thin film/surface and interfacial physical properties-related

  Kanazawa University

  吉田 靖雄

  From 01 Apr. 2024, To 31 Mar. 2028, Granted

  プローブ顕微鏡;超伝導;強磁場;走査トンネル顕微鏡;超低温;走査型トンネル顕微鏡

  https://kaken.nii.ac.jp/grant/KAKENHI-PROJECT-23K26541/
• Realization of topological superconductivity in perovskite oxide heterostructures with Dirac fermions

  Grant-in-Aid for Early-Career Scientists

  Basic Section 29020:Thin film/surface and interfacial physical properties-related

  Okinawa Institute of Science and Technology Graduate University;Tokyo Institute of Technology

  Yukiko Obata

  From 01 Apr. 2019, To 31 Mar. 2023, Project Closed

  ヘテロ界面;磁性体;超伝導体;薄膜作製;銅酸化物高温超伝導体;トポロジカル絶縁体;鉄系超伝導体;電子ドープ;光電子分光

  https://kaken.nii.ac.jp/grant/KAKENHI-PROJECT-19K15448/