2025
2024
Tatsuki Ito,Kanno Kazutaka, Satoshi Kawakami and Atsushi Uchida, “Evaluation of photonic approximate reservoir computing through quantization”
In Proceedings of International Symposium on Nonlinear Theory and Its Applications (NOLTA), pp.X-X, Dec. 2024.
Tatsuki Ito,Kanno Kazutaka, Satoshi Kawakami and Atsushi Uchida, “Performance evaluation of approximate reservoir computing with a semiconductor laser”
In Proceedings of International Symposium on Physics and Applications of Laser Dynamics (IS-PALD), pp.X-X, Nov. 2024.
Mitsumasa Nakajima, Satoshi Kawakami, Katsuma Inoue, Kohei Nakajima and Toshikazu Hashimoto, “Photonic Compute-in-Wire: Remotely Driven Photonic Deep Neural Network with Single Modulated Nonlinear Feedback Loop,”
Advanced Devices & Instrumentation – a Science Partner Journal, 2024
M. Guthaus, K. Kim, F. Brito-Filho, S. Kawakami and B. Murmann, “Open-Source Silicon—Unleashing Innovation and Collaboration,”
IEEE Design & Test, vol. 41, no. 6, pp. 5-7, Dec. 2024.
Satoshi Kawakami, Yusuke Ohtsubo, Koji Inoue and Masamitsu Tanaka, “Late Breaking Results: Single Flux Quantum based Brownian Circuits for Ultra-Low-Power Computing” In Proceedings of Design, Automation & Test in Europe Conference & Exhibition (DATE), pp.1-2, Mar. 2024.
Satoshi Kawakami, “Research on optical computing system architecture for simple recurrent neural networks”
Impact, vol. 2024, no. 1, 2024
中村 徹舟 , 宮村 信 , 井上 弘士 , 川上 哲志 , 阪本 利司 , 多田 宗弘 , 谷本 輝夫, “極低温不揮発FPGAを対象とした誤り耐性量子コンピュータ向け表面符号復号器のRTL設計” In IPSJ Transaction ACS, vol.XX, pp. xxx-xxx, 2024
2023
Keisuke Takano, Takeaki Yajima and Satoshi Kawakami,“Design of The Ultra-Low-Power Driven VMM Configurations for uW Scale IoT Devices”
In Proceedings of the IEEE International Symposium on Embedded Multicore/Many-core Systems-on-Chip (MCSoC), pp.65-72, Dec. 2023
Masamitsu Tanaka, Ikki Nagaoka, Satoshi Kawakami, Teruo Tanimoto, Takatugu Ono, Koji Inoue, and Akira Fujimaki, “Gate-level-pipeline SFQ circuits for high-throughput floating-point arithmetic”
The European Conference on Applied Superconductivity (EUCAS), Sep. 2023
Tesshu Nakamura, Makoto Miyamura, Koji Inoue, Satoshi Kawakami, Toshitsugu Sakamoto, Munehiro Tada and Teruo Tanimoto, “Dynamically Reconfigurable Decoder Architecture for Adaptive Error Correction Using Cryogenic Non-Volatile FPGAs”
In Proceedings of the Workshop: I too can Quantum (I2Q), Jun. 2023
中村 徹舟, 宮村 信, 井上 弘士, 川上 哲志, 阪本 利司, 多田 宗弘, 谷本 輝夫, “極低温不揮発 FPGA を対象とした 誤り耐性量子コンピュータ向け表面符号復号器の RTL 設計”
The cross-disciplinary Workshop on Computing Systems, Infrastructures, and Programming (xSIG), Jul. 2023
Kuan Yi Ng, Aalaa M.A. Babai, Teruo Tanimoto, Satoshi Kawakami and Koji Inoue,“Empirical Power-Performance Analysis of Layer-wise CNN Inference on Single Board Computers”
In IPSJ Transaction ACS, vol.31, pp. 478-494, 2023
Ikki Nagaoka, Ryota Kashima, Masamitsu Tanaka, Satoshi Kawakami, Teruo Tanimoto, Taro Yamashita, Koji Inoue, and Akira Fujimaki, “50-GFLOPS Floating-Point Adder and Multiplier Using Gate-Level-Pipelined Single-Flux-Quantum Logic with Frequency-Increased Clock Distribution”
In the IEEE Transactions on Applied Superconductivity, vol. 33, no. 4, pp. 1-11, June 2023
Takeaki Yajima, Yusuke Samata, Satoshi Hamasuna, Satya Prakash Pati, Akira Toriumi, “Zero-dimensionality of a scaled-down VO2 metal-insulator transition via high-resolution electrostatic gating” NPG Asia Materials 15 39-1-39-6 2023年6月
Xiangyu Chen, Zolboo Byambadorj, Takeaki Yajima, Hisashi Inoue, Isao H. Inoue, Tetsuya Iizuka, “CMOS-based area-and-power-efficient neuron and synapse circuits for time-domain analog spiking neural networks” Applied Physics Letters 122 074102 2023年2月
2022
Takumi Inaba, Takatsugu Ono, Koji Inoue and Satoshi Kawakami, “A Hybrid Opto-Electrical Floating-point Multiplier”
In Proceedings of the IEEE International Symposium on Embedded Multicore/Many-core Systems-on-Chip (MCSoC), pp.313-320, Dec. 2022
Eito Sato, Koji Inoue and Satoshi Kawakami, “Design and Analysis of a Nano-photonic Processing Unit for Low-Latency Recurrent Neural Network Applications”
In Proceedings of the IEEE International Symposium on Embedded Multicore/Many-core Systems-on-Chip (MCSoC), pp.321-329, Dec. 2022
Satoshi Matsushita, Teruo Tanimoto, Satoshi Kawakami, Takatsugu Ono, Koji Inoue,“An Edge Autonomous Lamp Control with Camera Feedback”
In Proceedings of the IEEE World Forum on Internet of Things (WF-IoT), Tech-01-6, Oct. 26th — Nob. 11th, 2022
Kuan Yi Ng, Aalaa M.A. Babai, Satoshi Kawakami, Teruo Tanimoto and Koji Inoue,“Layer-wise power/performance analysis for single-board CNN inference”
The cross-disciplinary Workshop on Computing Systems, Infrastructures, and Programming (xSIG), Jul. 2022
Iori Ishikawa, Koki Ishida, Masamitsu Tanaka, Ikki Nagaoka, Satoshi Kawakami, Teruo Tanimoto, Akira Fujimaki and Koji Inoue,“Design of Variable Bit-Width Arithmetic Unit Using Single Flux Quantum Device”
In Proceedings of IEEE International Symposium on Circuits & Systems (ISCAS), pp.3547-3551, May 2022
T. Yajima, S. P. Pati, “Controlling proton volatility in SiO2-capped TiO2 thin films for neuromorphic functionality [Editor’s Pick]” Applied Physics Letters 120(24) 241601-241601 2022年6月13日
Hang Yin, Takeaki Yajima, “Self-synchronized Rectifier with Phase Information Extracted from Vibration Energy Harvester” Sensors and Materials 34(5) 1899-1907 2022年5月
Xiangyu Chen, Takeaki Yajima, Isao H. Inoue, Tetsuya Iizuka, “An ultra-compact leaky integrate-and-fire neuron with long and tunable time constant utilizing pseudo resistors for spiking neural networks ” Japanese Journal of Applied Physics 61(SC) SC1051-SC1051 2022年5月1日
Takeaki Yajima, “Ultra-low-power switching circuits based on a binary pattern generator with spiking neurons ” Scientific Reports 12 1150 2022年1月 九大プレスリリース , JSTプレスリリース , JST news ４月号 , 日本経済新聞 , Science Japan
2021
Daisuke Yamagata, Satoshi Kawakami, Teruo Tanimoto, Koji Inoue and Takatsugu Ono, “Reducing a position map size of Oblivious RAM for implementing on microprocessors”
In Proceedings of the Symposium on Cryptography and Information Security (SCIS), Jan. 2021
Koki Ishida, Ilkwon Byun, Ikki Nagaoka, Kousuke Fukumitsu, Masamitsu Tanaka, Satoshi Kawakami, Teruo Tanimoto, Takatsugu Ono, Jangwoo Kim, and Koji Inoue, “Superconductor Computing for Neural Networks”
In IEEE Micro, vol.41, Issue 3, pp. 19-26, May-June 2021
Takeaki Yajima, Akira Toriumi, “Observation of the Pinch‐Off Effect during Electrostatically Gating the Metal‐Insulator Transition “
Advanced Electronic Materials 2100842-2100842 2021年11月21日
Taro Kato, Takahisa Tanaka, Takeaki Yajima, Ken Uchida, “Temperature dependence of resistivity increases induced by thiols adsorption in gold nanosheets ”
Japanese Journal of Applied Physics 60(SB) SBBH13-SBBH13 2021年2月3日
Takahisa Tanaka, Taro Kato, Takeaki Yajima, Ken Uchida, “Atomistic simulation study of impacts of surface carrier scatterings on carrier transport in Pt nanosheets ”
IEEE Electron Device Letters 1-1 2021年
2020
Koki Ishida, Ilkwon Byun, Ikki Nagaoka, Kousuke Fukumitsu, Masamitsu Tanaka, Satoshi Kawakami, Teruo Tanimoto, Takatsugu Ono, Jangwoo Kim, and Koji Inoue,“Architecting an Extremely Fast Neural Processing Unit Using Superconducting Logic Devices”
In Proceedings of IEEE/ACM International Symposium on Microarchtecture (MICRO-53), pp.58 – 72, Oct. 2020
Teruo Tanimoto, Shuhei Matsuo, Satoshi Kawakami, Yutaka Tabuchi, Masuo Hirokawa and Koji Inoue,“How many trials do we need for reliable NISQ computing?”
In Proceedings of the Quantum Computing Workshop (QCW) in conjunction with the IEEE Computer Society Annual Symposium on VLSI (ISVLSI), pp.288 – 290, Aug. 2020
Teruo Tanimoto, Shuhei Matsuo, Satoshi Kawakami, Yutaka Tabuchi, Masuo Hirokawa and Koji Inoue,“Practical Error Modeling Toward Realistic NISQ Simulation”
In Proceedings of the Quantum Computing Workshop (QCW) in conjunction with the IEEE Computer Society Annual Symposium on VLSI (ISVLSI), pp.291 – 293, Aug. 2020
Koki Ishida, Masamitsu Tanaka, Ikki Nagaoka, Takatsugu Ono, Satoshi Kawakami, Teruo Tanimoto, Akira Fujimaki and Koji Inoue,“32 GHz 6.5 mW Gate-Level-Pipelined 4-bit Processor using Superconductor Single-Flux-Quantum Logic”
In Proceedings of IEEE 2020 Symposium on VLSI Technology and Circuits (ISSCC), pp.1-2, June 2020
Keitaro Oka, Satoshi Kawakami, Teruo Tanimoto, Takatsugu Ono and Koji Inoue,“Enhancing a manycore-oriented compressed cache for GPGPU”
In Proceedings of the International Conference on High Performance Computing in Asia-Pacific (HPCAsia), pp.22 – 31, Jan. 2020【Best Paper Finalists】
T. Yajima, T. Nishimura, S. Migita, T. Tanaka, K. Uchida, A. Toriumi, “Regulating phase transformation kinetics via redox reaction in ferroelectric Ge-doped HfO2”
Applied Physics Letters 117(18) 182902 – 182902 2020年11月2日
Takeaki Yajima, Tomonori Nishimura, Takahisa Tanaka, Ken Uchida, Akira Toriumi, “Modulation of VO 2 Metal–Insulator Transition by Ferroelectric HfO 2 Gate Insulator ”
Advanced Electronic Materials 6(5) 1901356 – 1901356 2020年5月
T. Tanaka, T. Yajima, K. Uchida, “Impact of defects in self-assembled monolayer on humidity sensing by molecular functionalized transistors ”
Jpn. J. Appl. Phys. 2020年3月
X. Lu, T. Nishimura, T. Yajima, A. Toriumi, “Understanding of Fermi level pinning at metal/germanium interface based on semiconductor structure”
APEX 13 031003 2020年3月
M. Xie, T. Nishimura, T. Yajima, A. Toriumi, “Reaction of GeO2 with Ge and crystallization of GeO2 on Ge ”
J. Appl. Phys. 127 024101 2020年2月
矢嶋 赳彬, “金属絶縁体転移材料を利用した回路技術の研究 ”
電子情報通信学会 和文論文誌C J103-C(10) 420 – 427 2020年
2019
井上 弘士, 川上 哲志, 田中 雅光, “ムーアの法則の限界が見えた今、デバイス研究はどこに向かうのか ――コンピュータアーキテクチャの視点から――” 電子情報通信学会, Vol.102, No.10, pp.957-962, Oct. 2019（解説）
Kenichi Kitayama, Masaya Notomi, Makoto Naruse, Koji Inoue, Satoshi Kawakami, and Atsushi Uchida, “Novel frontier of photonics for data processing – Photonic accelerator -” APL Photonics, Vol.4, No.9, pp.090901, Sep. 2019
川上 哲志, 小野 貴継, 井上 弘士, 納富 雅也, “ナノフォトニック・ニューラルネットワークアクセラレータ向け統合評価環境” 電子情報通信学会論文誌A, Vol.J102-A, No.6, pp.182-193, Jun. 2019
B. Kim, Y. Hikita, T. Yajima, H. Hwang, “Heteroepitaxial vertical perovskite hot-electron transistors down to the monolayer limit”
Nature Commun. 10 5312 2019年12月
T. Yajima, T. Tanaka, Y. Samata, K. Uchida, A. Toriumi, “High-speed low-energy heat signal processing via digital-compatible binary switch with metal-insulator transitions”
International Electron Devices Meeting (IEDM) 903 – 906 2019年12月
J. Chen, W. Mao, L. Gao, F. Yan, T. Yajima, N. Chen, Z. Chen, H. Dong, B. Ge, P. Zhang, X. Cao, M. Silde, Y. Jiang, T. Terai, J. Shi, “Electron‐Doping Mottronics in Strongly Correlated Perovskite”
Adv. Mater. 32(6) 1905060 2019年12月
Tomonori Nishimura, Xuan Luo, Soshi Matsumoto, Takeaki Yajima, Akira Toriumi, “Almost pinning-free bismuth/Ge and/Si interfaces ”
AIP ADVANCES 9(9) 2019年9月
Chen Jikun, Hu Haiyang, Yajima Takeaki, Wang Jiaou, Ge Binghui, Dong Hongliang, Jiang Yong, Chen Nuofu, “Delta-temperatural electronic transportation achieved in metastable perovskite rare-earth nickelate thin films ”
JOURNAL OF MATERIALS CHEMISTRY C 7(26) 8101 – 8108 2019年7月14日
Chen Jikun, Hu Haiyang, Wang Jiaou, Yajima Takeaki, Ge Binghui, Ke Xinyou, Dong Hongliang, Jiang Yong, Chen Nuofu, “Overcoming synthetic metastabilities and revealing metal-to-insulator transition & thermistor bi-functionalities for d-band correlation perovskite nickelates ”
MATERIALS HORIZONS 6(4) 788 – 795 2019年4月
2018
Satoshi Kawakami, Takatsugu Ono, Koji Inoue, and Masaya Notomi, “Framework for Performance Analysis of Nano-Photonic Neural Accelerator”
In Proceedings of the 31st Workshop on Circuits and Systems (in Japanese), KWS31, pp.42–47, May 2018
Satoshi Kawakami, Takatsugu Ono, Toshiyuki Ohtsuka, and Koji Inoue, “Parallel Precomputation with Input Value Prediction for Model Predictive Control Systems”
IEICE Transactions on Information and Systems, vol. E101-D, No. 12, pp. 2864-2877, December 2018
T. Yajima, M. Minohara, C. Bell, H. Y. Hwang, Y. Hikita, “Inhomogeneous barrier heights at dipole-controlled SrRuO3/Nb:SrTiO3 Schottky junctions”
Applied Physics Letters 11 221603 2018年11月26日
T. Yajima, G. Oike, S. Yamaguchi, S. Miyoshi, T. Nishimura, A. Toriumi, “Hydrogenation of the wide-gap oxide semiconductor as a room-temperature and 3D-compatible electron doping technique”
AIP Advances 8 115133 2018年9月
T. Yajima, T. Nishimura, and A, Toriumi, “Analog Spike Processing with High Scalability and Low Energy Consumption Using Thermal Degree of Freedom in Phase Transition Materials”
VLSI (Technology) 18 27 – 28 2018年7月
Xuan Tian, Shigehisa Shibayama, Tomonori Nishimura, Takeaki Yajima, Shinji Migita, Akira Toriumi, “Evolution of ferroelectric HfO2 in ultrathin region down to 3 nm”
Applied Physics Letters 112(10) 2018年3月5日
Tomonori Nishimura, Xiaoyu Tang, Takeaki Yajima, Akira Toriumi, “Rigidity enhancement of GeO2by Y doping for reliable Ge gate stacks”
Electron Devices Technology and Manufacturing Conference (EDTM) 2018年3月
X Luo, T Nishimura, T Yajima, A Toriumi, “Potential Influence of Surface Atomic Disorder on Fermi-level Pinning at Metal/SiGe Interface”
Electron Devices Technology and Manufacturing (EDTM) 2018年3月
Y Noma, W Song, T Nishimura, T Yajima, A Toriumi, “Anomalous Spectral Shape Evolution of Ge Raman Shift in Oxidation of SiGe”
IEEE Electron Devices Technology and Manufacturing (EDTM) 2018年3月
Di Lu, Yasuyuki Hikita, David J. Baek, Tyler A. Merz, Hiroki Sato, Bongju Kim, Takeaki Yajima, Christopher Bell, Arturas Vailionis, Lena F. Kourkoutis, Harold Y. Hwang, “Strain Tuning in Complex Oxide Epitaxial Films Using an Ultrathin Strontium Aluminate Buffer Layer”
Physica Status Solidi – Rapid Research Letters 12(3) 2018年3月1日
Nishimura Tomonori, Tang Xiaoyu, Lu Cimang, Yajima Takeaki, Toriumi Akira, “Rigidity Enhancement of GeO2 by Y-Doping for Reliable Ge Gate Stacks”
IEEE JOURNAL OF THE ELECTRON DEVICES SOCIETY 6(1) 1207 – 1212 2018年3月
X. Tian, L. Xu, S. Shibayama, T. Nishimura, T. Yajima, S. Migita, A. Toriumi, “Sub-nm EOT ferroelectric HfO2 on p+Ge with highly reliable field cycling properties”
Technical Digest – International Electron Devices Meeting, IEDM 17 37.1.1 – 37.1.4 2018年1月23日
2017
Jikun Chen, Xinyou Ke, Jiaou Wang, Takeaki Yajima, Haijie Qian, Song Sun, “Dipole-correlated carrier transportation and orbital reconfiguration in strain-distorted SrNbxTi1-xO3/KTaO3” PHYSICAL CHEMISTRY CHEMICAL PHYSICS 19(44) 29913 – 29917 2017年11月
Lun Xu, Tomonori Nishimura, Shigehisa Shibayama, Takeaki Yajima, Shinji Migita, Akira Toriumi, “Kinetic pathway of the ferroelectric phase formation in doped HfO2 films”
JOURNAL OF APPLIED PHYSICS 122(12) 2017年9月
X. Wang, T. Nishimura, T. Yajima, A. Toriumi, “Thermal oxidation kinetics of germanium”
APPLIED PHYSICS LETTERS 111(5) 052101 2017年7月
Tony Chi Liu, Shoichi Kabuyanagi, Tomonori Nishimura, Takeaki Yajima, Akira Toriumi, “n(+)Si/pGe Heterojunctions Fabricated by Low Temperature Ribbon Bonding With Passivating Interlayer”
IEEE ELECTRON DEVICE LETTERS 38(6) 716 – 719 2017年6月
Xiuyan Li, Takeaki Yajima, Tomonori Nishimura, Akira Toriumi, “Thermodynamic understanding and analytical modeling of interfacial SiO2 scavenging in HfO2 gate stacks on Si, SiGe, and SiC”
APPLIED PHYSICS LETTERS 110(14) 2017年4月
Jikun Chen, Hongyi Chen, Feng Hao, Xinyou Ke, Nuofu Chen, Takeaki Yajima, Yong Jiang, Xun Shi, Kexiong Zhou, Max Dobeli, Tiansong Zhang, Binghui Ge, Hongliang Dong, Huarong Zeng, Wenwang Wu, Lidong Chen, “Ultrahigh Thermoelectric Performance in SrNb0.2Ti0.8O3 Oxide Films at a Submicrometer-Scale Thickness”
ACS ENERGY LETTERS 2(4) 915 – 921 2017年4月
Takeaki Yajima, Tomonori Nishimura, Akira Toriumi, Identifying the Collective Length in VO2 Metal-Insulator Transitions“” SMALL 13(12) 2017年3月
L. Xu, S. Shibayama, K. Izukashi, T. Nishimura, T. Yajima, S. Migita, A. Toriumi, “General relationship for cation and anion doping effects on ferroelectric HfO2 formation”
Technical Digest – International Electron Devices Meeting, IEDM 25.2.1 – 25.2.4 2017年1月31日
T. Yajima, T. Nishimura, A. Toriumi, “Functional passive material VO2 for analogue signal processing with high-speed, low power, and robust performance”
Technical Digest – International Electron Devices Meeting, IEDM 34.4.1 – 34.4.4 2017年1月31日
Takeaki Yajima, Tomonori Nishimura, Akira Toriumi, “Local, Isotropic, and Damageless Doping to Oxide Semiconductors by Using Electrochemistry”
2017 IEEE ELECTRON DEVICES TECHNOLOGY AND MANUFACTURING CONFERENCE (EDTM) 80 – 81 2017年
Nishimura Tomonori, Yajima Takeaki, Toriumi Akira, “Reconsideration of Metal Work Function at Metal/Semiconductor Interface”
SEMICONDUCTOR PROCESS INTEGRATION 10 80(4) 107 – 112 2017年
2016
Lun Xu, Tomonori Nishimura, Shigehisa Shibayama, Takeaki Yajima, Shinji Migita, Akira Toriumi, “Ferroelectric phase stabilization of HfO2 by nitrogen doping”
APPLIED PHYSICS EXPRESS 9(9) 2016年9月
Tomonori Nishimura, Lun Xu, Shigehisa Shibayama, Takeaki Yajima, Shinji Migita, Akira Toriumi, “Ferroelectricity of nondoped thin HfO2 films in TiN/HfO2/TiN stacks”
JAPANESE JOURNAL OF APPLIED PHYSICS 55(8) 2016年8月
Lun Xu, Takeaki Yajima, Tomonori Nishimura, Akira Toriumi, “Anomalous electrical properties of Au/SrTiO3 interface”
JAPANESE JOURNAL OF APPLIED PHYSICS 55(8) 2016年8月
Tomonori Nishimura, Takeaki Yajima, Akira Toriumi, “Reexamination of Fermi level pinning for controlling Schottky barrier height at metal/Ge interface”
APPLIED PHYSICS EXPRESS 9(8) 2016年8月
Takeaki Yajima, Go Oike, Tomonori Nishimura, Akira Toriumi, “Independent control of phases and defects in TiO2 thin films for functional transistor channels”
PHYSICA STATUS SOLIDI A-APPLICATIONS AND MATERIALS SCIENCE 213(8) 2196 – 2202 2016年8月
L. Xu, S. Shibayama, K. Izukashi, T. Nishimura, T. Yajima, S. Migita, A. Toriumi, “General relationship for cation and anion doping effects on ferroelectric HfO2 formation”
2016 IEEE INTERNATIONAL ELECTRON DEVICES MEETING (IEDM) 16 608 – 611 2016年
T. Yajima, T. Nishimura, A. Toriumi, “Functional Passive Material VO2 for Analogue Signal Processing with High-Speed, Low Power, and Robust Performance”
2016 IEEE INTERNATIONAL ELECTRON DEVICES MEETING (IEDM) 16 858 – 861 2016年
Shoichi Kabuyanagi, Tomonori Nishimura, Takeaki Yajima, Akira Toriumi, “Experimental evidence of zone-center optical phonon softening by accumulating holes in thin Ge”
AIP ADVANCES 6(1) 2016年1月
2015
Takeaki Yajima, Tomonori Nishimura, Akira Toriumi, “Positive-bias gate-controlled metal-insulator transition in ultrathin VO2 channels with TiO2 gate dielectrics”
NATURE COMMUNICATIONS 6 2015年12月
Xiuyan Li, Takeaki Yajima, Tomonori Nishimura, Akira Toriumi, “Study of Si kinetics in interfacial SiO2 scavenging in HfO2 gate stacks”
APPLIED PHYSICS EXPRESS 8(6) 2015年6月
Shoichi Kabuyanagi, Tomonori Nishiumura, Takeaki Yajima, Akira Toriumi, “Nondestructive characterization of oxide/germanium interface by direct-gap photoluminescence analysis”
APPLIED PHYSICS EXPRESS 8(5) 2015年5月
Takeaki Yajima, Yuma Ninomiya, Tomonori Nishimura, Akira Toriumi, “Drastic change in electronic domain structures via strong elastic coupling in VO2 films”
PHYSICAL REVIEW B 91(20) 2015年5月
Xiuyan Li, Takeaki Yajima, Tomonori Nishimura, Kosuke Nagashio, Akira Toriumi, “Analytical Formulation of SiO<inf>2</inf>-IL scavenging in HfO<inf>2</inf>/SiO<inf>2</inf>/Si gate stacks – A key is the SiO<inf>2</inf>/Si interface reaction”
Technical Digest – International Electron Devices Meeting, IEDM 2015-(February) 21.2.1 – 21.2.4 2015年2月20日
Yajima, Takeaki, Minohara, Makoto, Bell, Christopher, Kumigashira, Hiroshi, Oshima, Masaharu, Hwang, Harold Y., Hikita, Yasuyuki, “Enhanced Electrical Transparency by Ultrathin LaAlO3 Insertion at Oxide Metal/Semiconductor Heterointerfaces”
Nano Letters 15(3) 1622 – 1626 2015年
Yajima Takeaki, Hikita Yasuyuki, Minohara Makoto, Bell Christopher, Mundy Julia A., Kourkoutis Lena F., Muller David A., Kumigashira Hiroshi, Oshima Masaharu, Hwang Harold Y., “Controlling band alignments by artificial interface dipoles at perovskite heterointerfaces” Nature Communications 6 2015年
Xiuyan Li, Takeaki Yajima, Tomonori Nishimura, Akira Toriumi, “Significance of Kinetic-linkage of Oxygen Vacancy with SiO2/Si Interface for SiO2-IL Scavenging in HfO2 Gate Stacks”
2015 SILICON NANOELECTRONICS WORKSHOP (SNW) 2015年
Shoichi Kabuyanagi, Tomonori Nishimura, Takeaki Yajima, Akira Toriumi, “Effect of Free Carrier Accumulation or Depletion on Zone-center Vibrational Mode in Ge”
2015 SILICON NANOELECTRONICS WORKSHOP (SNW) 2015年
Tomonori Nishimura, Choong Hyun Lee, Toshimitsu Nakamura, Takeaki Yajima, Kosuke Nagashio, Koji Kita, Akira Toriumi, “Recent Progress of Junction Technology for Germanium CMOS”
2015 15TH INTERNATIONAL WORKSHOP ON JUNCTION TECHNOLOGY (IWJT) 65 – 68 2015年
Shoichi Kabuyanagi, Tomonori Nishimura, Takeaki Yajima, Akira Toriumi, “Gate-bias dependent phonon softening observed in Ge MOSFETs”
ECS Transactions 69(10) 75 – 80 2015年
2014
Xiuyan Li, Takeaki Yajima, Tomonori Nishimura, Kosuke Nagashio, Akira Toriumi, “Effect of Si substrate on interfacial SiO2 scavenging in HfO2/SiO2/Si stacks”
APPLIED PHYSICS LETTERS 105(18) 2014年11月
Tomonori Nishimura, Shoichi Kabuyanagi, Wenfeng Zhang, Choong Hyun Lee, Takeaki Yajima, Kosuke Nagashio, Akira Toriumi, “Atomically flat planarization of Ge(100), (110), and (111) surfaces in H-2 annealing”
APPLIED PHYSICS EXPRESS 7(5) 2014年5月
Xiuyan Li, Takeaki Yajima, Tomonori Nishimura, Kosuke Nagashio, Akira Toriumi, “HfO2-assisted SiO2 reduction in HfO2/SiO2/Si stacks”
THIN SOLID FILMS 557 272 – 275 2014年4月
Julia A. Mundy, Yasuyuki Hikita, Takeaki Hidaka, Takeaki Yajima, Takuya Higuchi, Harold Y. Hwang, David A. Muller, Lena F. Kourkoutis, “Visualizing the interfacial evolution from charge compensation to metallic screening across the manganite metal-insulator transition”
NATURE COMMUNICATIONS 5 2014年3月
Xiuyan Li, Takeaki Yajima, Tomonori Nishimura, Kosuke Nagashio, Akira Toriumi, “Effect of Si substrate on interfacial SiO2 scavenging in HfO2/SiO2/Si stacks”
APPLIED PHYSICS LETTERS 105(18) 2014年11月
Xiuyan Li, Takeaki Yajima, Tomonori Nishimura, Kosuke Nagashio, Akira Toriumi, “Analytical Formulation of SiO2-IL scavenging in HfO2/SiO2/Si gate stacks – A key is the SiO2/Si interface reaction -”
2014 IEEE INTERNATIONAL ELECTRON DEVICES MEETING (IEDM) 2014年
Xiuyan Li, Takeaki Yajima, Tomonori Nishimura, Kosuke Nagashio, Akira Toriumi, “Kinetic Model for Scavenging of SiO2 Interface Layer in HfO2 Gate Stacks”
2014 IEEE SILICON NANOELECTRONICS WORKSHOP (SNW) 2014年
2013
Satoshi Kawakami, Akihito Iwanaga, and Koji Inoue, “Speculative Execution for Real-time Model Predictive Control on Manicure Processor (in Japanese)”
In Proceedings of the 2013 Symposium on Advanced Computing Systems and Infrastructures (SACSIS), pp78-82, May 2013
Satoshi Kawakami, Akihito Iwanaga, and Koji Inoue,“Many-core Acceleration for Model Predictive Control Systems”
In Proceedings of the ACM International Workshop on Manycore Embedded Systems in conjunction with the International Symposium on Computer Architecture (ISCA), pp.17 – 24, June 2013
S. Harashima, C. Bell, M. Kim, T. Yajima, Y. Hikita, H. Y. Hwang, “Coexistence of two-dimensional and three-dimensional Shubnikov–de Haas oscillations in Ar+-irradiated KTaO3”
Phys. Rev. B 88(8) 085102 2013年8月2日
Kumari Gaurav Rana, Takeaki Yajima, Subir Parui, Alexander F. Kemper, Thomas P. Devereaux, Yasuyuki Hikita, Harold Y. Hwang, Tamalika Banerjee, “Hot electron transport in a strongly correlated transition-metal oxide”
SCIENTIFIC REPORTS 3 2013年2月
T. Nishimura, S. Kabuyanagi, C. H. Lee, T. Yajima, K. Nagashio, A. Toriumi, “Atomically Flat Germanium (111) Surface by Hydrogen Annealing”
ULSI PROCESS INTEGRATION 8 58(9) 201 – 206 2013年
Go Oike, Takeaki Yajima, Tomonori Nishimura, Kosuke Nagashio, Akira Toriumi, “High electron mobility (>16 cm2/Vsec) FETs with high on/off ratio (>106) and highly conductive films (σ>102 S/cm) by chemical doping in very thin (∼20 nm) TiO2 films on thermally grown SiO2”
Technical Digest – International Electron Devices Meeting, IEDM 11.5.4 2013年
2011
Bongju Kim, Daeyoung Kwon, Takeaki Yajima, Christopher Bell, Yasuyuki Hikita, Bog G. Kim, Harold Y. Hwang, “Reentrant insulating state in ultrathin manganite films”
APPLIED PHYSICS LETTERS 99(9) 2011年8月
Takeaki Yajima, Yasuyuki Hikita, Harold Y. Hwang, “A heteroepitaxial perovskite metal-base transistor”
NATURE MATERIALS 10(3) 198 – 201 2011年3月
2010
2009
T. Higuchi, T. Yajima, L. Fitting Kourkoutis, Y. Hikita, N. Nakagawa, D. A. Muller, H. Y. Hwang, “Mn3O4 precipitates in laser-ablated manganite films”
APPLIED PHYSICS LETTERS 95(4) 043112 2009年7月
Yasuyuki Hikita, Mitsuru Nishikawa, Takeaki Yajima, Harold Y. Hwang, “Termination control of the interface dipole in La0.7Sr0.3MnO3/Nb:SrTiO3 (001) Schottky junctions”
PHYSICAL REVIEW B 79(7) 2009年2月
