Hiroki Wadati

Japanese version is here.

Associate Professor

Institute for Solid State Physics, University of Tokyo

Wadati Lab

[Research Subjects]

(- March, 2007) Photoemission study of transition-metal oxides in the form of epitaxial thin films

(April, 2007- ) Resonant soft x-ray scattering and x-ray absorption studies of the interfaces in transition-metal-oxide thin films

[Academic Experience]

2002 BS, Department of Physics, University of Tokyo

2004 MS, Fujimori Group, Department of Physics, University of Tokyo

Thesis "In-situ Photoemission Study of La1-xSrxFeO3 Epitaxial Thin Films" download (4.69MB)

2007 DSc, Fujimori Group, Department of Physics, University of Tokyo

Thesis "Photoemission studies of perovskite-type transition-metal oxides in epitaxial thin films" download (18.5MB)

[Professional Experience]

Apr, 2005-Mar, 2007: Research Fellow of the Japan Society for the Promotion of Science (JSPS) (DC2)

Apr, 2007-Mar, 2009: JSPS Postdoctoral Fellow for Research Abroad, Sawatzky Group, University of British Columbia

Apr, 2009-May, 2009: Postdoctoral Fellow, Sawatzky Group, University of British Columbia

June, 2009-June, 2010: CIFAR Global Scholar, Sawatzky Group, University of British Columbia

July, 2010-December, 2013: Lecturer, Department of Applied Physics and Quantum-Phase Electronics Center (QPEC), University of Tokyo

January, 2014-: Associate Professor, Institute for Solid State Physics, University of Tokyo

- Visiting Appointment -

Feb 1-5, 2010 Visiting Scientist, EMPA (Dr. Artur Braun)

[Publication list]

Original Papers

(In English)

2017

80. Y. Yokoyama, Y. Yamasaki, M. Taguchi, Y. Hirata, K. Takubo, J. Miyawaki, Y. Harada, D. Asakura, J. Fujioka, M. Nakamura, H. Daimon, M. Kawasaki, Y. Tokura, and H. Wadati: "Tensile-Strain Dependent Spin States in Epitaxial LaCoO3 Thin Films", arXiv:1708.07529v2.

79. K. Yamamoto, Y. Hirata, M. Horio, Y. Yokoyama, K. Takubo, M. Minohara, H. Kumigashira, Y. Yamasaki, H. Nakao, Y. Murakami, A. Fujimori, and H. Wadati: "Thickness dependence and dimensionality effects of charge and magnetic orderings in La1/3Sr2/3FeO3 thin films", arXiv:1703.09995v1.

78. Y. Kubota, M. Taguchi, H. Akai, Sh. Yamamoto, T. Someya, Y. Hirata, K. Takubo, M. Araki, M. Fujisawa, K. Yamamoto, Y. Yokoyama, S. Yamamoto, M. Tsunoda, H. Wadati, S. Shin and I. Matsuda: "L-edge resonant magneto-optical Kerr effect of a buried Fe nanofilm", Phys. Rev. B 96, 134432-1-6 (2017).

77. K. Takubo, Y. Yokoyama, H. Wadati, S. Iwasaki, T. Mizokawa, T. Boyko, R. Sutarto, F. He, K. Hashizume, S. Imaizumi, T. Aoyama, Y. Imai, and K. Ohgushi: "Orbital order and fluctuations in the two-leg ladder materials BaFe2X3 (X=S and Se) and CsFe2Se3", Phys. Rev. B 96, 115157-1-7 (2017); arXiv:1704.04864v1.

76. K. Takubo, K. Yamamoto, Y. Hirata, Y. Yokoyama, Y. Kubota, S. Yamamoto, S. Yamamoto, I. Matsuda, S. Shin, T. Seki, K. Takanashi, and H. Wadati: "Capturing ultrafast magnetic dynamics by time-resolved soft x-ray magnetic circular dichroism", Appl. Phys. Lett. 110, 162401-1-5 (2017); arXiv:1701.03156v1.

2016

75. M. Minohara, M. Kitamura, H. Wadati, H. Nakao, R. Kumai, Y. Murakami, and H. Kumigashira: "Thickness-dependent physical properties of La1/3Sr2/3FeO3 thin films grown on SrTiO3 (001) and (111) substrates", J. Appl. Phys. 120, 025303-1-6 (2016).

74. T. Tsuyama, S. Chakraverty, S. Macke, N. Pontius, C. Schussler-Langeheine, H. Y. Hwang, Y. Tokura, and H. Wadati: "Photoinduced Demagnetization and Insulator-to-Metal Transition in Ferromagnetic Insulating BaFeO3 thin films", Phys. Rev. Lett. 116, 256402-1-5 (2016); arXiv:1511.03365v1.

73. D. Asakura, E. Hosono, Y. Nanba, H. Zhou, J. Okabayashi, C. Ban, P.-A. Glans, J. Guo, T. Mizokawa, G. Chen, A. J. Achkar, D. G. Hawthron, T. Z. Regier, and H. Wadati: "Material/element-dependent fluorescence-yield modes on soft X-ray absorption spectroscopy of cathode materials for Li-ion batteries", AIP Advances 6, 035105-1-8 (2016).

2015 2014 2013 2012 2011 2010 2009 2008 2007 2006 2005 2004

(In Japanese)

H. Wadati, S. Yamamura, K. Ishii, M. Suzuki, E. Ikenaga, J. Matsuno, and H. Takagi: "Electronic Structures of SrIrO3/SrTiO3 Superlattices Revealed by Synchrotron X-Ray Diffraction and Spectroscopy", Adv. X-Ray. Chem. Anal. Japan 48, 215-223 (2017) .

Proceedings

2017

13. Y. Kubota, Sh. Yamamoto, T. Someya, Y. Hirata, K. Takubo, M. Araki, M. Fujisawa, K. Yamamoto, Y. Yokoyama, M. Taguchi, S. Yamamoto, M. Tsunoda, H. Wadati, S. Shin and I. Matsuda: "Polarization dependence of resonant magneto-optical Kerr effect measured by two types of figure-8 undulators", J. Electron. Spectrosc. Relat. Phenom. 220, 17-20 (2017).

2012 2011 2007 2006 2005

Books, others

16. H. Wadati: Time-resolved x-ray diffraction/spectroscopy study of transition-metal compounds, Kotai Butsuri 52(5) 45-53 (2017).

15. H. Wadati: "Resonant Soft X-Ray Scattering Studies of Transition-Metal Oxides", Resonant X-Ray Scattering in Correlated Systems (Springer) 159-196, (2017).

14. H. Wadati: "Novel spintronics and devil's staircase", Parity 31(5), 48 (2016).

13. H. Wadati and Y. Tanaka: "Resonant soft x-ray diffraction studies of transition-metal compounds", Journal of the Japanese Society for Synchrotron Radiation Research 27, 298-306 (2014).

12. H. Wadati and A. Fujimori: "Hard x-ray photoemission spectroscopy of transition-metal oxide thin films and interfaces", J. Electron Spectrosc. Relat. Phenom. 190, 222–227 (2013).

11. H. Wadati and A. Fujimori: "X-Ray Spectroscopic Studies of Conducting Interfaces between Two Insulating Oxides", Functional Metal Oxides (Wiley) 303-318 (2013).

10. H. Wadati: "Report on JSSRR scientific awards", Journal of the Japanese Society for Synchrotron Radiation Research 26, 118-121 (2013).

9. A. J. Achkar, T. Z. Regier, H. Wadati, E. J. Monkman, K. M. Shen, Y.-J. Kim, H. Zhang, and D. G. Hawthorn: "Developments in Inverse Partial Fluorescence Yield", CLS Research Report 2011, 28-29 (2012).

8. H. Wadati, J. Okamoto, M. Garganourakis, V. Scagnoli, U. Staub, Y. Yamasaki, H. Nakao, Y. Murakami, M. Mochizuki, M. Nakamura, M. Kawasaki, and Y. Tokura: "Origin of the Large Electric Polarization in Multiferroic Orthorhombic YMnO3 Thin Films Revealed by Soft and Hard X-Ray Diffraction", Photon Factory Activity Report 2011, PART A, Highlights and Facilty Report, 20-21 (2012).

7. H. Wadati: "Magnetic Frustration in a Mn Honeycomb Lattice Induced by Mn-O-O-Mn Pathways", Frustration Newsletter Vol.12, 24-25 (2011).

6. H. Wadati, D. G. Hawthorn, T. Z. Regier, G. Chen, T. Hitosugi, T. Mizokawa, A. Tanaka, and G. A. Sawatzky: "Valence evaluation of LiMnO2 and related battery materials by x-ray absorption spectroscopy", CLS Research Report 2010, 26-27 (2011).

5. H. Wadati: "Electronic structure of the SrTiO3/LaAlO3 interface revealed by resonant soft x-ray scattering", Journal of the Japanese Society for Synchrotron Radiation Research 22, 70-76 (2009).

4. H. Wadati, A. Maniwa, A. Chikamatsu, I. Ohkubo, H. Kumigashira, M. Oshima, A. Fujimori, M. Lippmaa, M. Kawasaki, and H. Koinuma: "An In Situ Photoemission Study of Pr1-xCaxMnO3 Epitaxial Thin Films with Suppressed Charge Ordering", Photon Factory Activity Report 2007, PART A, Highlights and Facilty Report, 26-27 (2008).

3. H. Wadati: "Recent PhD Graduates", Journal of the Japanese Society for Synchrotron Radiation Research 20, 203-204 (2007).

2. H. Wadati, T. Yoshida and A. Fujimori: "High-Resolution Photoemission Spectroscopy of Perovskite-Type Transition-Metal Oxides", Lect. Notes Phys. 715 "High-Resolution Photoemission Spectroscopy" (Springer-Verlag), 327-347 (2007).

1. H. Wadati: "In-situ Photoemission Study of La1-xSrxFeO3 Epitaxial Thin Films", Bussei Kenkyu (Kyoto) 82, 978-1010 (2004).

[Newspaper]

1. Nikkan Kogyo Shimbun (Jan. 25, 2012)

[Presentations in International Conferences]

2017

46. Current trends in Optical and X-Ray metrologies of key enabling nanomaterials/devices for the Ubiquitous Society, renewable energy and health: Time-resolved x-ray scattering and its application to magnetism (Okayama, November 2017).

45. BIT's 7th Annual World Congress of Nano-S&T: Ultrafast Magnetic Dynamics Studied by Time-Resolved Soft X-Ray Diffraction and Absorption (Fukuoka, October 2017).

44. EMN Meeting On Ultrafast: Ultrafast spin dynamics studied by time-resolved soft x-ray measurements (Orlando, October 2017).

43. XXVI International Materials Research Congress: Ultrafast magnetic dynamics revealed by time-resolved x-ray measurement (Cancun, August 2017).

2016 2015 2014 2013 2012 2011 2010 2009 2008 2007 2006 2005 2004 2003

[Research Funding]

(Kakenhi)

1. Wakate (B) (2016-04-01 - 2018-03-31)

(Private companies)

7. 2017 The Murata Foundation for Basic Research (Travel support)

6. 2016 Toray Research Foundation

5. 2016 Research Foundation for Opto-Science and Technology

4. 2015 The Asahi Foundation for Basic Research

3. 2014 The Murata Foundation for Basic Research

2. 2013 The Sumitomo Foundation for Basic Science Research Projects

1. 2011 The Kao Foundation for Arts and Sciences

[Lectures]

6. 2017 Physics Seminar (Winter Semester)

5. 2016 Optical Properties and Spectroscopy of Materials (Summer Semester)

4. 2015 Optical Properties and Spectroscopy of Materials (Summer Semester)

3. 2013 Mathematics 2B (Summer Semester)

2. 2012 Mathematics 2B (Summer Semester)

1. 2011 Mathematics 2D practice (Summer Semester)

[Prizes, Awards]

9. Young Scientist Award of the Physical Society of Japan (March 2016)

8. 2013 NIMS Conference Poster Presentation Award (July 2013).

7. 17th JSSRR scientific awards (January 2013).

6. Inoue Research Award for Young Scientists, Inoue Foundation for Science (February 2009).

5. Faculty of Science Study Award, University of Tokyo (March 2007).

4. The Best Talk Award, The 19th symposium of The Japanese Society for Synchrotron Radiation Research (January 2006).

3. The Best Poster Award, The 1st symposium of SR Surface Science Division in Surface Science Society of Japan (November 2005).

2. The Best Poster Award, The 17th symposium of The Japanese Society for Synchrotron Radiation Research (January 2004).

1. The Best Poster Award, PF symposium "Nanotechnology and High-Energy-Resolution Photoemission Spectroscopy" (December 2003).

[Membership]

American Physical Society

The Physical Society of Japan

The Japanese Society for Synchrotron Radiation Research

The Japan Society of Applied Physics

Other Activities

Vancouver Go Association

E-mail

Contact, Location

Institute for Solid State Physics, University of Tokyo

5-1-5 Kashiwanoha, Kashiwa, Chiba 277-8581, Japan

TEL: +81-4-7136-3400 FAX: +81-4-7136-3283


Wadati Lab (University of Tokyo)

Institute for Solid State Physics (University of Tokyo)

CIFAR Global Scholar Alumni

Members of Sawatzky Group (UBC)

Members of Fujimori Group (University of Tokyo)