"J. Wu,F. Liu,M. Sasase,K. Ienaga,Y. Obata,R. Yukawa,K. Horiba,H. Kumigashira,S. Okuma,T. Inoshita,H. Hosono","Natural van der Waals heterostructural single crystals with both magnetic and topological properties",,"Science Advances",,"Vol. 5","no. 11","  eaax9989",2019,Nov.
"Kenichi Ozawa,Susumu Yamamoto,Ryu Yukawa,Ro-Ya Liu,Naoya Terashima,Yuto Natsui,Hiroo Kato,Kazuhiko Mase,Iwao Matsuda","Correlation between Photocalatytic Activity and Carrier Lifetime: Acetic Acid on Single-Crystal Surfaces of Anatase and Rutile TiO2",,"Journal of Physical Chemistry C","American Chemical Society","Vol. 122",,"pp. 9562-9569",2018,Apr.
"Masaki Kobayashi,K. Yoshimatsu,Taichi Mitsuhashi,Miho Kitamura,Enju Sakai,Ryu Yukawa,Makoto Minohara,Atsushi Fujimori,Koji Horiba,Hiroshi Kumigashira","Emergence of Quantum Critical Behavior in Metallic Quantum-Well States of Strongly Correlated Oxides",,"Scientific Reports",,"Vol. 7",,"pp. 16621",2017,Nov.
"Kenichi Ozawa,Susumu Yamamoto,Ryu Yukawa,Roya Liu,Masato Emori,Koki Inoue,Taku Higuchi,Hiroshi Sakama,Kazuhiko Mase,Iwao Matsuda","What Determines the Lifetime of Photoexcited Carriers on TiO2 Surfaces?",,"The Journal of Physical Chemistry C","American Chemical Society","Vol. 120",,"pp. 29283-29289",2016,Dec.
"R. Yukawa,KENICHI OZAWA,S. Yamamoto,H. Iwasawa,K. Shimada,E. F. Schwier,K. Yoshimatsu,H. Kumigashira,H. Namatame,M. Taniguchi,I. Matsuda","Photon-dressed two-dimensional carriers on the ZnO surface",,"Physical Review B - Condensed Matter and Materials Physics","American Physical Society","Vol. 94",,"p. 165313",2016,Oct.
"Ryu Yukawa,Susumu Yamamoto,Kazuma Akikubo,Kaori Takeuchi,Kenichi Ozawa,Hiroshi Kumigashira,Iwao Matsuda","Tailoring Photovoltage Response at SrRuO3/SrTiO3 Heterostructures",,"Advanced Materials Interfaces","John Wiley & Sons, Inc.","Vol. 3","No. 22",,2016,Sept.
"Kenichi Ozawa,Susumu Yamamoto,Ryu Yukawa,Kazuma Akikubo,Masato Emori,Hiroshi Sakama,Iwao Matsuda","Capturing transiently charged states at the C60/TiO2(110) interface by time-resolved soft X-ray photoelectron spectroscopy",,"Organic Electronics","Elsevier B.V.","Vol. 31",,"pp. 98-103",2016,Jan.
"R. Yukawa,K. Ozawa,S. Yamamoto,Roya Liu,I. Matsuda","Anisotropic effective mass approximation model to calculate multiple subband structures at wide-gap semiconductor surfaces: Application to accumulation layers of SrTiO3 and ZnO",,"Surface Science","Elsevier B.V.","Vol. 641",,"pp. 224-230",2015,July
"R. Yukawa,S. Yamamoto,K. Ozawa,M. Emori,M. Ogawa,Sh. Yamamoto,K. Fujikawa,R. Hobara,S. Kitagawa,Hiroshi Daimon,H. Sakama,I. Matsuda","Electron-hole recombination on ZnO(0001) single-crystal surface studied by time-resolved soft X-ray photoelectron spectroscopy",,"Applied Physics Letters","AIP Publishing","Vol. 105",,"p. 151602",2014,Oct.
"KENICHI OZAWA,Masato Emori,Susumu Yamamoto,Ryu Yukawa,Shingo Yamamoto,Rei Hobara,Kazushi Fujikawa,Hiroshi Sakama,Iwao Matsuda","Electron-Hole Recombination Time at TiO2 Single-Crystal Surfaces: Influence of Surface Band Bending",,"Journal of Physical Chemistry Letters","American Chemical Society","Vol. 5",,"pp. 1953-1957",2014,May
"R. Yukawa,S. Yamamoto,K. Ozawa,M. D'Angelo,Manami Ogawa,M.G. Silly,F. Sirotti,I. Matsuda","Electronic structure of the hydrogen-adsorbed SrTiO3(001) surface studied by polarization-dependent photoemission spectroscopy",,"Physical Review B","American Physical Society","Vol. 87",,"p. 115314",2013,Mar.
"M. D'Angelo,R. Yukawa,K. Ozawa,S. Yamamoto,T. Hirahara,S. Hasegawa,M.G. Silly,F. Sirotti,I. Matsuda","Hydrogen-induced surface metallization of SrTiO3(001)",,"Physical Review Letters",,"Vol. 108",,"p. 116802",2012,Mar.