舟窪研究室 | 東京工業大学物質理工学院材料系材料コース

研究業績

2019年以降の英語原著論文について掲載しています。それ以前のものについてはT2R2（東工大リサーチリポジトリー）をご覧ください。

学会発表・特許等につきましてもT2R2（東工大リサーチリポジトリー）をご覧ください。

2023

Yongtao Liu, Rama K. Vasudevan,Kyle P. Kelley, Hiroshi Funakubo, Maxim Ziatdinov, and Sergei V. Kalinin, “Learning the right channel in multimodal imaging: automated experiment in Piezoresponse Force Microscopy”, npj Computational Materials, 9[34] (2023).
Akinori Tateyama, Yuichiro Orino, Yoshiharu Ito, Takahisa Shiraishi, Takao Shimizu, Minoru Kurosawa, and Hiroshi Funakubo, “Simultaneous high frequency measurement of both direct and inverse transverse piezoelectric coefficients of thin films using longitudinal vibration”, Sensors & Actuators: A. Physical, 354, 114265(2023).
Takanori Mimura, Yuki Tashiro, Takao Shimizu, and Hiroshi Funakubo, “Systematic Investigation of Ferroelectric Properties in x%YO_1.5–(100–x%)Hf_1–yZr_yO₂ Films”, ACS Appl. Electron. Mater., 5[3], 1600–1605(2023).
Akinori Tateyama, Yoshiharu Ito, Takahisa Shiraishi, Minoru Kurosawa, and Hiroshi Funakubo, “Effect of film thickness on output power of a piezoelectric vibration energy harvester using hydrothermally synthesized (K,Na)NbO₃ film”, Jpn. J. Appl. Phys., 62, 016502(2023).

2022

Yoshitaka Ehara, Takaaki Nakashima, Daichi Ichinose, Takao Shimizu, Takahisa Shiraishi, Osami Sakata, Tomoaki Yamada, Shintaro Yasui, Ken Nishida, and Hiroshi Funakubo, “Film thickness dependence of in-plane ferroelastic domain structure in constrained tetragonal PbTiO₃ films induced by isotropic tensile strain”, Appl. Phys. Lett., 121, 262901(2022).
Felix Cüppers, Koji Hirai, and Hiroshi Funakubo, “On the switching dynamics of epitaxial ferroelectric CeO₂-HfO₂ thin film capacitors”, Nano Convergence, 9[56], 1-9(2022).
Yongtao Liu, Kyle P. Kelley, Rama K. Vasudevan, Wanlin Zhu, John Hayden, Jon-Paul Maria, Hiroshi Funakubo, Maxim A. Ziatdinov, Susan Trolier-McKinstry, Sergei V. Kalinin, “Automated Experiments of Local Non-linear Behavior in Ferroelectric Materials”, Small, 18, 2204130(2022).
Shinnosuke Yasuoka, Ryoichi Mizutani, Reika Ota, Takahisa Shiraishi, Takao Shimizu, Masato Uehara, Hiroshi Yamada, Morito Akiyama, and Hiroshi Funakubo, “Tunable Ferroelectric Properties in Wurtzite (Al_0.8Sc_0.2)N via Crystal Anisotropy”, ACS Appl. Electron. Mater., 4, 5165−5170(2022).
Pratyush Buragohain, Haidong Lu, Claudia Richter, Tony Schenk, Pamenas Kariuki, Sebastjan Glinsek, Hiroshi Funakubo, Jorge Íñiguez, Emmanuel Defay, Uwe Schroeder, and Alexei Gruverman, “Quantification of the electromechanical measurements by piezoresponse force microscopy”, Adv. Mater., 34[47], 2206237(2022).
Masanori Kodera, Keisuke Ishihama, Takao Shimizu, and Hiroshi Funakubo, “Preferential growth of (001)-oriented Bi₂SiO₅ thin films deposited on (101)-oriented rutile substrates and their ferroelectric and dielectric properties”, Scientific Reports, 12, 15204(2022).
Yongtao Liu, Kyle P. Kelley, Hiroshi Funakubo, Sergei V. Kalinin, and Maxim Ziatdinov, “Exploring Physics of Ferroelectric Domain Walls in Real Time: Deep Learning Enabled Scanning Probe Microscopy”, Adv. Sci., 9[31], 2203957(2022).
Yoshitaka Ehara, Hitoshi Morioka, Takeshi Kobayashi, Shintaro Yasui, Ken Nishida, and Hiroshi Funakubo, “In-situ observation of reversible 90°-domain switching in Pb(Zr,Ti)O₃ films for microcantilever structure”, Jpn. J. Appl. Phys., 61, SN1025(2022), REGULAR PAPER.
Masayuki Fukuda, Hidenobu Murata, Takumi Nishikubo, Qiumin Liu, Koomok Lee, Takehiro Koike, Yuma Takahashi, Saori Kawaguchi, Naohisa Hirao, Hiroshi Funakubo, Masaki Azuma, “Suppression of Pressure-Induced Phase Transitions in a Monoclinically Distorted LiNbO₃-Type CuNbO₃ by Preference for Cu Triangular Coordination Environment”, Inorg. Chem., 61, 12719–12725(2022).
Yongtao Liu, Kyle P. Kelley, Rama K. Vasudevan, Hiroshi Funakubo, Shelby S. Fields, Takanori Mimura, Susan Trolier-McKinstry, Jon F. Ihlefeld, Maxim Ziatdinov, and Sergei V. Kalinin, “Machine Learning-Driven Automated Scanning Probe Microscopy for Ferroelectrics”, Microsc. and Microanal., 28[S1], 2924(2022).
Koji Hirai, Takahisa Shiraishi, Wakiko Yamaoka, Risako Tsurumaru, Yukari Inoue, and Hiroshi Funakubo, “Composition dependence of ferroelectric properties in (111)-oriented epitaxial HfO₂-CeO₂ solid solution films”, Jpn. J. Appl. Phys., 61, SN1019(2022).
Akinori Tateyama, Yoshiharu Ito, Takahisa Shiraishi, Minoru Kurosawa, and Hiroshi Funakubo, “Effect of film thickness on piezoelectric vibrator using hydrothermally synthesized epitaxial (K_0.88Na_0.12)NbO₃ film”, Jpn. J. Appl. Phys., 61, SN1016(2022).
Yoshiomi Hiranaga, Takanori Mimura, Takao Shimizu, Hiroshi Funakubo, and Yasuo Cho, “Nanoscale Mapping Concerning Asymmetry of Local C-V Curves in Ferroelectric Materials”, Jpn. J. Appl. Phy., 61, SN1014(2022).
Rurika Kubota, Akinori Tateyama, Yoshiharu Ito, Takahisa Shiraishi, Minoru Kurosawa, and Hiroshi Funakubo, “Process window for growth of polar-axis-oriented tetragonal (Bi,K)TiO₃ epitaxial films on (100)cSrRuO₃//(100)SrTiO₃ substrates by hydrothermal method”, J. Mater. Sci., 57, 14003–14014(2022).
Masato Uehara, Ryoichi Mizutani, Shinnosuke Yasuoka, Takao Shimizu, Hiroshi Yamada, Morito Akiyama, and Hiroshi Funakubo, “Lower ferroelectric coercive field of ScGaN with equivalent remanent polarization as ScAlN”, Appl. Phys. Exp., 15, 081003(2022).
Kazuma Yoshizawa, Masashi Suzuki, Shoji Kakio, Yoshiharu Ito, Akinori Tateyama, Takahisa Shiraishi, Hiroshi Funakubo, Tsuyoshi Wakabayashi, and Kenji Shibata, “Evaluation of bulk and surface acoustic waves propagation properties of (K,Na)NbO₃ films deposited by hydrothermal synthesis or RF sputtering”, Jpn. J. Appl. Phys., 61, SG1077(2022).
Keisuke Matsuura, Masashi Suzuki, Shoji Kakio, Masanori Kodera, and Hiroshi Funakubo, “Deposition and evaluation of Ta₂O₅ piezoelectric thin film on Pt crystal film”, Jpn. J. Appl. Phys., 61, SG1076(2022).
Takanori Mimura, Takao Shimizu, and Hiroshi Funakubo, “Preparation of orthorhombic Y-doped TaON film”, J. Ceram. Soc. Jpn., 130[7], 432-435(2022).
Shinnosuke Yasuoka, Ryoichi Mizutani, Reika Ota, Takahisa Shiraishi, Takao Shimizu, Shintaro Yasui, Yoshitaka Ehara, Ken Nishida, Masato Uehara, Hiroshi Yamada, Morito Akiyama, Yasuhiko Imai, Osami Sakata, and Hiroshi Funakubo, “Enhancement of crystal anisotropy and ferroelectricity by decreasing thickness in (Al,Sc)N films”, J. Ceram. Soc. Jpn., 130[7], 436-441(2022).
Yongtao Liu, Kyle P. Kelley, Rama K. Vasudevan, Hiroshi Funakubo, Maxim A. Ziatdinov, and Sergei V. Kalinin, “Experimental discovery of structure-property relationships in ferroelectric materials via active learning”, Nature Machine Intelligence, 4, 341-350(2022).
Takahisa Shiraishi, Toyohiko J. Konno, Hiroshi Funakubo, “Ferroelectric and piezoelectric properties of 100 nm-thick CeO₂-HfO₂ epitaxial films”, Appl. Phys. Lett., 120, 132901(2022).
Rurika Kubota, Akinori Tateyama, Takahisa Shiraish, Yoshiharu Ito, Minoru Kurosawa, and Hiroshi Funakubo, “Film thickness dependence of ferroelectric properties in polar-axis oriented epitaxial (Bi,K)TiO₃ films prepared by Hydrothermal method”, AIP Advances, 12, 035241(2022).
Tomoya Sato, Masanori Kodera, Daichi Ichinose, Takanori Mimura, Takao Shimizu, Tomoaki Yamada and Hiroshi Funakubo, “Domain structures induced by tensile thermal strain in epitaxial PbTiO₃ films on silicon substrates”, J. Appl. Phys., 131, 035301(2022).
Reijiro Shimura, Takanori Mimura, Akinori Tateyama, Takahisa Shiraishi, Takao Shimizu, Tomoaki Yamada, Yoshitomo Tanaka, Yukari Inoue, and Hiroshi Funakubo, “No-Heating Deposition of 1-μm-Thick Y-Doped HfO₂ Ferroelectric Films with Good Ferroelectric and Piezoelectric Properties by Radio Frequency Magnetron Sputtering Method”, Phys. Status Solidi RRL, 16, 21005(2022).
Yoshiharu Ito, Akinori Tateyama, Rurika Kubota, Takahisa Shiraish, Takao Shimizu, Osami Sakata, Jaemyung Kim, Minoru Kurosawa, and Hiroshi Funakubo, “Polar-axis oriented epitaxial tetragonal (Bi,K)TiO₃ films deposited below Curie temperature by hydrothermal method”, Appl. Phys. Lett., 120, 022903(2022).
Masaki Okura, Yoshiharu Ito, Takahisa Shiraishi, Takanori Kiguchi, Toyohiko J. Konno, Hiroshi Funakubo and Hiroshi Uchida, “Lower-Temperature Processing of Potassium Niobate Films by Microwave-Assisted Hydrothermal Deposition Technique”, J. Ceram. Soc. Jpn., 130[1], 123-130(2022).

2021

Pratyush Buragohain, Adam Erickson, Takanori Mimura, Hiroshi Funakubo, and Alexei Gruverman, “Effect of film microstructure on the polarization switching behavior in ferroelectric Y:HfO₂ thin films”, Adv Functional Material, 2108876(2021).
Takao Shimizu, Miyu Hasegawa, Keisuke Ishihama, Akinori Tateyama, Wakiko Yamaoka, Risako Tsurumaru, Shintaro Yoshimura, Yusuke Sato, and Hiroshi Funakubo, “Piezoelectric responses beyond Pb(Zr,TiO)₃ in Pb-free perovskite thin films by ferroelastic domain switching: Free from Pb and MPB”, ACS Appl. Mater. Interfaces, 13, 57532−57539(2021).
Takanori Mimura, Takao Shimizu, Yoshio Katsuya, Osami Sakata, and Hiroshi Funakubo, “Thickness dependence of phase stability in epitaxial (Hf_xZr_1-x)O₂ films”, Physical review materials, 5, 114407(2021).
Masato Uehara, Ryoichi Mizutani, Shinnosuke Yasuoka, Takahisa Shiraishi, Takao Shimizu, Hiroshi Yamada, Morito Akiyama, and Hiroshi Funakubo, “Demonstration of ferroelectricity in GaN-based thin film”, Appl. Phys. Lett., 119, 172901-1-5(2021).
Keisuke Ishihama, Takao Shimizu, Wakiko Yamaoka, Risako Tsurumaru, Shintaro Yoshimura, Yusuke Sato, and Hiroshi Funakubo, “Composition dependencies of crystal structure and electrical properties of epitaxial tetragonal (Bi, Na)TiO₃-BaTiO₃ films grown on (100)cSrRuO₃//(100)SrTiO₃ substrates by pulsed laser depositions”, J. Appl. Phys., 130, 134102-1-9(2021).
Ryoichi Mizutani, Shinnosuke Yasuoka, Takahisa Shiraishi, Takao Shimizu, Masato Uehara, Hiroshi Yamada, Morito Akiyama, Osami Sakata, and Hiroshi Funakubo, “Thickness scaling of (Al_0.8Sc_0.2)N films with remanent polarization beyond 100 μC/cm² around 10 nm in thickness”, Appl. Phys. Exp., 14, 105501(2021).
Shinya Kondo, Reijiro Shimura, Takashi Teranishi, Akira Kishimoto, Takanori Nagasaki, Hiroshi Funakubo, and Tomoaki Yamada, “Influence of orientation on electro-optic effect in epitaxial Y-doped HfO₂ ferroelectric thin films”, Jpn. J. Appl. Phys., 60, SFFB13-1-5(2021).
Yoshiomi Hiranaga, Takanori Mimura, Takao Shimizu, Hiroshi Funakubo, and Yasuo Cho, “High-precision Local C-V Mapping for Ferroelectrics Using Principal Component Analysis”, Jpn. J. Appl. Phys., 60, SFFB09-1-8(2021).
Yoshitaka Ehara, Daichi Ichinose, Masanori Kodera, Takahisa Shiraishi, Takao Shimizu, Tomoaki Yamada, Ken Nishida, and Hiroshi Funakubo, “Influence of cooling rate on ferroelastic domain structure for epitaxial (100)/(001)-oriented Pb(Zr, Ti)O₃ thin films under tensile strain”, Jpn. J. Appl. Phys., 60, SFFB07-1-6(2021).
Shinnosuke Yasuoka, Takao Shimizu, Masato Uehara, Hiroshi Yamada, Morito Akiyama, and Hiroshi Funakubo, “Impact of deposition temperature on crystal structure and ferroelectric properties of (Al_1-xSc_x)N films prepared by sputtering method”, Phys. Status Solidi A, 2100302-1-6(2021).
Akinori Tateyama, Yoshiharu Ito, Takahisa Shiraishi, Yuichiro Orino, Minoru Kurosawa, and Hiroshi Funakubo, “Thermal stability of self-polarization in a (K,Na)NbO₃ film prepared by the hydrothermal method”, Jpn. J. Appl. Phys., 60, SFFB03(2021), REGULAR PAPER.
Rama Vasudevan, Kyle Kelley, Jacob Hinkle, Hiroshi Funakubo, Stephen Jesse, Sergei Kalinin, Maxim Ziatdinov, “Autonomous Experiments in Scanning Probe Microscopy and Spectroscopy: Choosing Where to Explore Polarization Dynamics in Ferroelectrics”, ACS Nano, 15, 11253-11262(2021).
Keisuke Ishihama, Masanori Kodera, Takao Shimizu, Wakiko Yamaoka, Risako Tsurumaru, Shintaro Yoshimura, Yusuke Sato, and Hiroshi Funakubo, “Growth of 0.1(Bi, Na)TiO₃-0.9BaTiO₃ epitaxial films by pulsed laser deposition and their electric properties”, J. Ceram. Soc. Jpn., 129[7], 337-342(2021).
Yuki Tashiro, Takao Shimizu, Takanori Mimura, and Hiroshi Funakubo, “Comprehensive study on the kinetic formation of the orthorhombic ferroelectric phase in epitaxial Y-doped ferroelectric HfO₂ thin films”, ACS Applied Electronic Materials, 3[7], 3123-3130(2021).
Shinya Kondo, Reijiro Shimura, Takashi Teranishi, Akira Kishimoto, Takanori Nagasaki, Hiroshi Funakubo, and Tomoaki Yamada, “Linear electro-optic effect in CMOS-compatible ferroelectric HfO₂-based epitaxial thin films”, Jpn. J. Appl. Phys., 60, 070905(2021), RAPID COMMUNICATION.
Takao Shimizu, Yuki Tashiro, Takanori Mimura, Takanori Kiguchi, Takahisa Shiraishi, Toyohiko J. Konnno, Osami Sakata, and Hiroshi Funakubo, “Electric-field-induced ferroelectricity in 5%Y-doped Hf_0.5Zr_0.5O₂: Transformation from the paraelectric tetragonal phase to the ferroelectric orthorhombic phase”, Physica Status Solidi, 15[5], 2000589-1-7(2021).
Takanori Mimura, Takao Shimizu, Osami Sakata, and Hiroshi Funakubo, “Large Thermal hysteresis of ferroelectric transition in HfO₂-based ferroelectric films”, Appl. Phys. Let., 118, 112903(2021).
Reijiro Shimura, Takanori Mimura, Akinori Tateyama, Takao Shimizu, Tomoaki Yamada, and Hiroshi Funakubo, “Preparation of 1 μm-thick Y-doped HfO₂ ferroelectric films on (111)Pt/TiO_x/SiO₂/(001)Si substrates by a sputtering method and their ferroelectric and piezoelectric properties”, Jpn. J. Appl. Phys., 60, 031009(2021).
Daichi Ichinose, Takao Shimizu, Osami Sakata, Tomoaki Yamada, Yoshitaka Ehara, and Hirosh Funakubo, “Domain structure transition in compressive strained (100)/(001) epitaxial tetragonal PZT film”, J. Appl. Phys., 129, 024101-1-6(2021).

2020

Yoshiomi Hiranaga, Takanori Mimura, Takao Shimizu, Hiroshi Funakubo, and Yasuo Cho, “Local C-V mapping for ferroelectrics using scanning nonlinear dielectric microscopy”, J. Appl. Phys., 128, 244105(2020).
Rama K. Vasudevan, Kyle P. Kelley, Eugene Eliseev, Stephen Jesse, Hiroshi Funakubo, Anna Morozovska, and Sergei V. Kalinin, “Bayesian inference in band excitation Scanning Probe Microscopy for optimal dynamic model selection in imaging”, J. Appl. Phys., 128, 054105-1-10(2020).
Masanori Kodera, Takao Shimizu, and Hiroshi Funakubo, “Epitaxial Crystal Growth of Bismuth Silicate Driven by Fluorite-Like Layers”, Cryst. Growth Des., 20, 7163−7169(2020).
Atsuo Katagiri, Mutsuo Uehara, Mao Kurokawa, Kensuke Akiyama, Takao Shimizu, Masaaki Matsushima, Hiroshi Uchida, Yoshisato Kimura, and Hiroshi Funakubo, “Composition Dependence of Crystal Structures and Electrical Properties of Ca-Mg-Si Films Prepared by Sputtering”, Journal of ELECTRONIC MATERIALS, 49[12], 7509-7517(2020).
Akinori Tateyama, Yoshiharu Ito, Yoshiko Nakamura, Takao Shimizu, Yuichiro Orino, Minoru Kurosawa, Hiroshi Uchida, Takahisa Shiraishi, Takanori Kiguchi, Toyohiko J. Konno, Takeshi Yoshimura, and Hiroshi Funakubo, “Good piezoelectricity of self-polarized thick epitaxial (K,Na)NbO3 films grown below the Curie temperature (240°C) using a hydrothermal method”, Appl. Phys. Lett., 117, 142903-1-6(2020).
Shinnosuke Yasuoka, Takao Shimizu, Masato Uehara, Hiroshi Yamada, Morito Akiyama, Yoshiomi Hiranaga, Yasuo Cho, and Hiroshi Funakubo, “Effects of deposition conditions on the ferroelectric properties of (Al1-xScx)N thin films”, J. Appl. Phys., 128, 114103-1-11(2020).
Kyle Kelley, Linglong Li, Yao Ren, Yoshitaka Ehara, Hiroshi Funakubo, Suhas Somnath, Stephen Jesse, Ye Cao, Ramakrishnan Kannan, Rama Vasudevan, and Sergei Kalinin, “Tensor factorization for elucidating mechanisms of piezoresponse relaxation via dynamic piezoresponse force spectroscopy”, npj Computational Materials, 6, 113(2020).
Hiroshi Uchida, Masaki Okura, Yoshiharu Ito, Takahisa Shiraishi, Takanori Kiguchi, Toyohiko J. Konno, and Hiroshi Funakubo, “Rapid deposition of (K,Na)NbO3 thick films using microwave-assisted hydrothermal technique”, Jpn. J. Appl. Phys., 59, SPPB02(2020).
Mitsumasa Nakajima, Takao Shimizu, Hiroshi Nakaki, Tomoaki Yamada, Ayumi Wada, Takaaki Nakashima, Yoshitaka Ehara, and Hiroshi Funakubo, “Large electromechanical responses driven by electrically induced dense ferroelastic domains: beyond morphotropic phase boundary”, ACS Appl. Electron. Mater. 2020, 2, 1908−1916(2020).
Kyle P. Kelley, Yao Ren, Anna N. Morozovska, Eugene A. Eliseev, Yoshitaka Ehara, Hiroshi Funakubo, Thierry Giamarchi, Nina Balke, Rama K. Vasudevan, Ye Cao, Stephen Jesse, and Sergei V. Kalinin, “Dynamic Manipulation in Piezoresponse Force Microscopy: Creating Nonequilibrium Phases with Large Electromechanical Response”, ACS Nano 2020, 14, 10569−10577(2020).
Yu Huang, Yoshiharu Ito, Akinori Tateyama, Minoru Kurosawa, and Hiroshi Funakubo, “Crystal structure and properties of epitaxial (1-x)(Bi0.5Na0.5)TiO3-x(Bi0.5K0.5)TiO3 films grown by hydrothermal method”, Jpn. J. Appl. Phys., 59, SPPB10-1-8(2020).
Yoshitaka Ehara, Takaaki Nakashima, Daichi Ichinose, Takao Shimizu, Tomoaki Yamada, Ken Nishida, and Hiroshi Funakubo, “Temperature dependence on the domain structure of epitaxial PbTiO3 films grown on single-crystal substrates with different lattice parameters”, Jpn. J. Appl. Phys., 59, SPPB01-1-5(2020).
Akinori Tateyama, Yoshiharu Ito, Takao Shimizu, Yuichiro Orino, Minoru Kurosawa, Takeshi Yoshimura, and Hiroshi. Funakubo, “Composition dependency of direct and inverse transverse piezoelectric property in self-polarized epitaxial (KxNa1-x)NbO3 films grown by hydrothermal method”, Jpn. J. Appl. Phys., 59, SPPC03-1-7(2020).
Hiroki Tanaka, Kiyoshi Uchiyama, Takao Shimizu, and Hiroshi Funakubo, “Optimization of deposition conditions of Y doped-SrZrO3 thin films fabricated by pulsed laser deposition”, J. Ceram. Soc. Jpn., 128[8], 436-440(2020).
Yoshiharu Ito, Akinori Tateyama, Yoshiko Nakamura, Takao Shimizu, Minoru Kurosawa, Hiroshi Uchida, Takahisa Shiraishi, Takanori Kiguchi, Toyohiko J. Konno, Mutsuo Ishikawa, Nobuhiro Kumada, and Hiroshi Funakubo, “High yield preparation of (100)c-oriented (K,Na)NbO3 thick films by hydrothermal method using amorphous niobium source”, J. Ceram. Soc. Jpn., 128[8], 512-517(2020).
Reijiro Shimura, Takanori Mimura, Takao Shimizu, Yoshitomo Tanaka, Yukari Inoue, and Hiroshi Funakubo, “Preparation of near-1-µm-thick {100}-oriented epitaxial Y-doped HfO2 ferroelectric films on (100)Si substrates by an RF magnetron sputtering method”, J. Ceram. Soc. Jpn., 128[8], 539-543(2020).
Kazuki Okamoto, Tomoaki Yamada, Kentaro Nakamura, Hidenori Takana, Osami Sakata, Mick Phillips, Takanori Kiguchi, Masahito Yoshino, Hiroshi Funakubo, and Takanori Nagasaki, “Enhanced intrinsic piezoelectric response in (001)-epitaxial single c-domain Pb(Zr,Ti)O3 nanorods”, Appl. Phys. Lett., 117, 042905-1-5(2020).
Y. Shiotsu, S. Yamamoto, Y. Shuto, H. Funakubo, M. K. Kurosawa, S. Sugahara, “Modeling and Design of a New Piezoelectronic Transistor for Ultralow-Voltage High-Speed Integrated Circuits”, IEEE Trans. on Electron Devices, vol. 67, no. 9, pp. 3852-3860, Aug. 2020.
Keisuke Yazawa, Benjamin Ducharne, Hiroshi Uchida, Hiroshi Funakubo, and John E. Blendell, “Barkhausen Noise Analysis of Thin Film Ferroelectrics”, Appl. Phys. Lett., Vol. 117, pp. 012902-1-4, June 2020.
Takahisa Shiraishi, Yuta Muto, Yoshiharu Ito, Takanori Kiguchi, Kazuhisa Sato, Masahiko Nishijima, Hidehiro Yasuda, Hiroshi Funakubo, and Toyohiko J. Konno, “Structural and electrical characterization of hydrothermally-deposited piezoelectric (K,Na)(Nb,Ta)O3 thick films”, J. Mater. Sci., Vol. 55, pp. 8829–8842, Apr. 2020.
Masanori Kodera, Ayako Taguchi, Takao Shimizu, Hiroki Moriwake, and Hiroshi Funakubo, “FabricationFabrication and characterization of ReO3-type dielectric films”, J. Mater. Chem. C, Vol. 8, No. 14, pp. 4680-4684, Mar. 2020.
Yoshiyuki Seki, Yutaka Sawada, Hiroshi Funakubo, Kazuhisa Kawano, and Noriaki Oshima, “Preparation of iridium metal films by spray chemical vapor deposition”, MRS Advances, 5(31-32), 1681-1685, Feb. 2020.
Takanori Mimura, Takao Shimizu, Hiroshi Uchida, and Hiroshi Funakubo, “Room-temperature deposition of ferroelectric HfO2-based films by the sputtering method”, Appl. Phys. Lett., Vol. 116, pp. 062901-1-5, Feb. 2020.
Takanori Mimura, Takao Shimizu, Yoshio Katsuya, Osami Sakata, and Hiroshi Funakubo, “Thickness- and orientation- dependences of Curie temperature in ferroelectric epitaxial Y doped HfO2 films”, Jpn. J. Appl. Phys., Vol. 59, pp. SGGB04-1-6, Feb. 2020.
Joel Molina-Reyes, Takuya Hoshii, Shun-Ichiro Ohmi, Hiroshi Funakubo, Atsushi Hori, Ichiro Fujiwara, Hitoshi Wakabayashi, Kazuo Tsutsui, and Kuniyuki Kakushima, “NiSi2 as a Bottom Electrode for Enhanced Endurance of Ferroelectric Y-doped HfO2 Thin Films”, Jpn. J. Appl. Phys., Vol. 59, pp. SGGB06-1-6, Feb. 2020.
Atsuo Katagiri, Shota Ogawa, Takao Shimizu, Masaaki Matsushima, Kensuke Akiyama, Hiroshi Uchida, and Hiroshi Funakubo, “Epitaxial growth of Mg2Si films on (111) Si substrates covered with epitaxial SiC layers”, Jpn. J. Appl. Phys., Vol. 59, pp. SF1001-1-4, Jan. 2020.
Kodai Aoyama, Takao Shimizu, Hideto Kuramochi, Masami Mesuda, Ryo Akiike, Keisuke Ide, Takayoshi Katase, Toshio Kamiya, Yoshisato Kimura, and Hiroshi Funakubo, “Fabrication and characterization of CaxSr1-x)Si2 films prepared by co-sputtering method”, MRS Advances, 5(10), 451-458, Jan. 2020.
Kodai Aoyama, Takao Shimizu, Hideto Kuramochi, Masami Mesuda, Ryo Akiike, Keisuke Ide, Takayoshi Katase, Toshio Kamiya, Yoshisato Kimura, and Hiroshi Funakubo, “Thermoelectric (BaxSr1–x)Si2 films prepared by sputtering method over the barium solubility limit”, Jpn. J. Appl. Phys., vol. 59, pp. SFFB02-1-6, Jan. 2020.

2019

Hyeon Jun Lee, Takao Shimizu, Hiroshi Funakubo, Yasuhiko Imai, Osami Sakata, Seung Hyun Hwang, Tae Yeon Kim, Changjae Yoon, Cheng Dai, Long Q. Chen, Su Yong Lee, Ji Young Jo. “Electric-Field-Driven Nanosecond Ferroelastic-Domain Switching Dynamics in Epitaxial Pb(Zr,Ti)O3 Film,” Phys. Rev. Lett., Vol. 123, pp. 217601, Nov. 2019.
Yoshitaka Ehara, Takao Shimizu, Shintaro Yasui, Takahiro Oikawa, Takahisa Shiraishi, Hiroki Tanaka, Noriyuki Kanenko, Ronald Maran, Tomoaki Yamada, Yasuhiko Imai, Osami Sakata, Nagarajan Valanoor, Hiroshi Funakubo. “Ferroelastic Domain Motion by Pulsed Electric Field in (111)/(11-1) Rhombohedral Epitaxial Pb(Zr0.65Ti0.35)O3 Thin Films: Fast Switching and Rrelaxation,” Physical Review B, vol. 100, pp. 104116 1-7, Sep. 2019.
P.S. Sankara Rama Krishnan, Anna N. Morozovska, Eugene A. Eliseev, Shota Ogawa, Atsuo Katagiri, Masaaki Matsushima, Kensuke Akiyama, Hiroshi Uchida, Hiroshi Funakubo. “Kinetics of Interfacial Microstructural Variation across Insulator-Thermoelectric Semiconductor interface and its Effects on Thermoelectric Properties of Magnesium Silicide Thin Films,” Materialia, Vol. 7, pp. 100340, Sep. 2019.
Yoshiharu Ito, Akinori Tateyama, Yoshiko Nakamura, Takao Shimizu, Minoru Kurosawa, Hiroshi Uchida, Takahisa Shiraishi, Takanori Kiguchi, Toyohiko J. Konno, Mutsuo Ishikawa, Hiroshi Funakubo. “Growth of epitaxial (K, Na)NbO3 films with various orientations by hydrothermalmethod and their properties,” Jpn. J. Appl. Puys., Vol. 58, pp. SLLB14, Sep. 2019.
Junpei Morishita, Hirokazu Kazama, Yusuke Sato, Hiroshi Funakubo. “Epitaxial growth of (Bi,K)TiO3-Bi(Mg,Ti)O3 (001) films and their ferroelectric and piezoelectric properties,” Jpn. J. Appl. Phys., Vol. 58, pp. SLLB13, Sep. 2019.
Masanori Kodera, Takao Shimizu, Hiroshi Funakubo. “Ferroelectric properties of epitaxial Bi2SiO5 thin films grown on SrTiO3 substrates with various orientations,” Jpn. J. Appl. Phys., Vol. 58, pp. SLLB04, Aug. 2019.
Tomoya Sato, Takanor Kiguchi, Toyohiko Konno, Junichi Kimura, Daichi Ichinose, Takanori Mimura, Hiroshi Funakubo, Kiyoshi Uchiyama. “Growth of (110)-one-axis-oriented perovskite-type oxide thin films with local epitaxy on (111)SrTiO3 single crystal substrates,” Jpn. J. Appl. Phys., Vol. 58, pp. SLLB01, Aug. 2019.
Hidehisa Inoue, Takao Shimizu, Hiroshi Funakubo. “Electric field-induced change in the crystal structure of MOCVD-Pb(Zr,Ti)O3 films near the phase boundary,” Jpn. J. Appl. Phys., Vol. 58, pp. SLLB07, Aug. 2019.
Yuta Muto, Takahisa Shiraishi, Yoshiharu Ito, Akinori Tateyama, Hiroshi Uchida, Takanori Kiguchi, Hiroshi Funakubo, Toyohiko J. Konno. “Effect of Ta-substitution on the deposition of (K,Na)(Nb,Ta)O3 films by hydrothermal method,” Jpn. J. Appl. Phys., Vol. 58, pp. SLLB12, Aug. 2019.
Takanori Mimura, Takao Shimizu, Hiroshi Funakubo. “Ferroelectricity in YO1.5-HfO2 films around 1 μm in thickness,” Appl. Phys. Lett., Vol. 115, pp. 032901, Jul. 2019.
Yoshiharu ITO, Akinori TATEYAMA, Yoshiko NAKAMURA, Takao SHIMIZU, Minoru KUROSAWA, Hiroshi UCHIDA, Takahisa SHIRAISHI, Takanori KIGUCHI, Toyohiko J. KONNO, Mutsuo ISHIKAWA, Hiroshi FUNAKUBO. “Deposition of orientation-controlled thick (K, Na)NbO3 films on metal substrates by repeated hydrothermal deposition technique,” Journal of the Ceramic Society of Japan, Vol. 127, No. 7, pp. 478-484, Jul. 2019.
T. Shiraishi, S. Choi, T. Kiguchi, T. Shimizu, H. Funakubo, T. J. Konno. “Formation of the orthorhombic phase in CeO2-HfO2 solid solution epitaxial thin films and their ferroelectric properties,” Appl. Phys. Lett., Vol. 14, pp. 232902-1-5, Jun. 2019.
Kodai AOYAMA, Takao SHIMIZU, Hideto KURAMOCHI, Masami MESUDA, Ryo AKIIKE, Yoshisato KIMURA, Hiroshi FUNAKUBO. “Evaluation of phase and thermoelectric properties of thin film SrSi2,” Journal of the Ceramic Society of Japan, Vol. 127, No. 6, pp. 394-398, Jun. 2019.
Takahisa SHIRAISHI, Yuta MUTO, Yoshiharu ITO, Akinori TATEYAMA, Hiroshi UCHIDA, Takanori KIGUCHI, Minoru K. KUROSAWA, Hiroshi FUNAKUBO, Toyohiko. J. KONNO. “Low-temperature deposition of Li substituted (K,Na)NbO3 films by a hydrothermal method and their structural and ferroelectric properties,” Journal of the Ceramic Society of Japan, Vol. 127, No. 6, pp. 388-393, Jun. 2019.
Lu Yo, Yang Zhang, Shuang Zhou, Apoorva Chaturvedi, Samuel A. Morris, Fucai Liu, Lei Chang, Daichi Ichinose, Hiroshi Funakubo, Weijin Hu, Tom Wu, Zheng Liu, Shuai Dong, Junling Wang. “Origin of giant negative piezoelectricity in a layered van der Waals ferroelectric,” Science Advances, Vol. 5, No. 4, pp. eaav3780, Apr. 2019.
Akinori Tateyama, Yoshiharu Ito, Yoshiko Nakamura, Takao Shimizu, Yuichiro Orino, Minoru Kurosawa, Hiroshi Uchida, Takahisa Shiraishi, Takanori Kiguchi, Toyohiko J. Konno, Nobuhiro Kumada, Hiroshi Funakubo. “Effects of starting materials on the deposition behavior of hydrothermally synthesized {100}c -oriented epitaxial (K,Na)NbO3 thick films and their ferroelectric and piezoelectric properties,” J. Crystal Growth, Vol. 511, pp. 1-7, Apr. 2019.
Joe Sakai, Maxime Bavencoffe, Beatrice Negulescu, Patrice Limelette, Jérôme Wolfman, Akinori Tateyama, Hiroshi Funakubo. “Strain-induced resistance change in V2O3 films on piezoelectric ceramic disks,” J. Appl. Phys., Vol. 125, pp. 115102-1-6, Mar. 2019.
Mutsuo Uehara, Atsuo Katagiri, Mao Kurokawa, Kensuke Akiyama, Takao Shimizu, Masaaki Matsushima, Hiroshi Uchida, Yoshisato Kimura, Hiroshi Funakubo. “Preparation of CaMgSi and Ca7Mg7.25Si14 single phase films and their thermoelectric properties,” MRS Adv., Vol. 4, No. 25-26, pp. 1503-1508, Feb. 2019.
Takanori Mimura, Takao Shimizu, Takanori Kiguchi, Akihiro Akama, Toyohiko J. Konno, Yoshio Katsuya, Osami Sakata, Hiroshi Funakubo. “Effects of heat treatment and in-situ high temperature XRD study on the formation of ferroelectric epitaxial Y doped HfO2 film,” Jpn. J. Appl. Phys., Vol. 58, pp. SBBB09-1-5, Feb. 2019.
Masamichi NISHIDE, Shintaro YOKOYAMA, Hiroshi FUNAKUBO, Takashi KATODA, Ken NISHIDA. “Impact of stress on the crystal structural nonuniformity along the film thickness direction by microfabrication of Pb(Zr, Ti)O3 island with morphotropic phase boundary composition,” Journal of the Ceramic Society of Japan, Vol. 127, No. 2, pp. 123-126, Feb. 2019.
Kensuke Akiyama, Sakiko Nojima, Ryo Takahashi, Yoshihisa Matsumoto, Hiroshi Funakubo. “MOCVD growth of β-FeSi2 film on modified Si surface by silver and enhancement of luminescence,” J. Cryst. Growth, Vol. 506, pp. 131-134, Jan. 2019.
Sang Mo Yang, Yeong Jae Shin, Yoshitaka Ehara, Hiroshi Funakubo, Jong-Gul Yoon, James F. Scott, Tae Won Noh. “Superdomain structure and high conductivity at the vertices in the (111)-oriented epitaxial tetragonal Pb(Zr,Ti)O3 thin film,” Current Applied Physics, Vol. 19, No. 4, pp. 418-423, Jan. 2019.