Kenichi OTO

Name	Kenichi OTO
URL
Affiliation	Chiba University
Section	大学院理学研究院物理学研究部門
Job title	教授
Degree	博士（理学）(大阪大学)
J-Global ID	202001001213396059

Research Interests

Quantum Hall Effect ,Quantum Transport in Low-dimensional Electron Systems ,Semiconductor Physics

Research Areas

Natural sciences / Semiconductors, optical and atomic physics / Physical properties I

Education

Osaka University Graduate School of Science

Committee Memberships

12 >

Apr 2019

Mar 2021

千葉大学先進科学センターセンター長

Apr 2018

Mar 2019

先進科学センター入学者選考委員会委員長 [学部委員会]

Apr 2017

Mar 2019

千葉大学先進科学センター副センター長

Apr 2016

Mar 2018

先進科学センター教務委員長 [学部委員会]

Apr 2017

国際教養学部倫理審査会委員 [学部委員会]

Papers

12 3 4 5 >

Valley polarized conductance quantization in bilayer graphene narrow quantum point contact

Kohei Sakanashi Naoto Wada Kentaro Murase Kenichi Oto Gil-Ho Kim Kenji Watanabe Takashi Taniguchi Jonathan P. Bird David K. Ferry Nobuyuki Aoki

Applied Physics Letters 118(26) 263102-263102 Jun 2021 [Refereed]

Quantized exciton-exciton annihilation in monolayer WS2 on SrTiO3 substrate with atomically flat terraces

Yuto Kajino Kohei Sakanashi Nobuyuki Aoki Kenji Watanabe Takashi Taniguchi Kenichi Oto Yasuhiro Yamada

Physical Review B 103(24) Jun 2021 [Refereed]

Monolayer materials are strongly affected by their potential fluctuations,
which are induced by an intrinsic corrugation or the surface roughness of the
substrate. We compare the effective exciton-exciton annihilation (EEA) rate
constants of monol...

Polaron Masses in CH3NH3PbX3 Perovskites Determined by Landau Level Spectroscopy in Low Magnetic Fields

Yasuhiro Yamada Hirofumi Mino Takuya Kawahara Kenichi Oto Hidekatsu Suzuura Yoshihiko Kanemitsu

Physical Review Letters 126(23) Jun 2021 [Refereed]

We investigate the electron-phonon coupling in CH3NH3PbX3 lead halide perovskites through the observation of Landau levels and high-order excitons at weak magnetic fields, where the cyclotron energy is significantly smaller than the longitudinal o...

Observation of high carrier mobility in CH3NH3PbBr3 single crystals by AC photo-Hall measurements

Takumi Kimura Kouhei Matsumori Kenichi Oto Yoshihiko Kanemitsu Yasuhiro Yamada

APPLIED PHYSICS EXPRESS 14(4) Apr 2021 [Refereed]

Carrier mobility is one of the most fundamental material parameters of semiconductors and requisite for device applications and interpretation of physical phenomena. We determined the electron and hole mobilities of a CH3NH3PbBr3 single crystal in...

Modification of Optical Properties in Monolayer WS2 on Dielectric Substrates by Coulomb Engineering

Yuto Kajino Kenichi Oto Yasuhiro Yamada

The Journal of Physical Chemistry C 123(22) 14097-14102 Jun 2019 [Refereed]

Misc.

12 3 4 5 >

Quantized exciton-exciton annihilation in monolayer WS₂ on atomically flat substrate

梶野祐人音賢一山田泰裕

応用物理学会春季学術講演会講演予稿集(CD-ROM) 67th 2020

Spin Relaxation Dynamics in CH₃NH₃PbBr₃ Bulk Crystals Revealed by Optical Microspectroscopy

五十嵐菜々子音賢一金光義彦山田泰裕

応用物理学会秋季学術講演会講演予稿集(CD-ROM) 81st 2020

Exciton-exciton annihilation in WS₂ monolayer depending on surface roughness of substrate

梶野祐人音賢一山田泰裕

応用物理学会秋季学術講演会講演予稿集(CD-ROM) 81st 2020

Carrier-Resolved Photo-Hall Measurement in CH₃NH₃PbBr₃ Single Crystal

木村匠音賢一金光義彦山田泰裕

応用物理学会秋季学術講演会講演予稿集(CD-ROM) 81st 2020

光電流スペクトルを用いたMoS₂単層膜における誘電遮蔽効果の解明

荒居誠也梶野祐人音賢一山田泰裕

応用物理学会春季学術講演会講演予稿集(CD-ROM) 66th 2019

Presentations

12 3 >

単層WS2の励起子共鳴エネルギーに対する誘電遮蔽効果

梶野祐人荒居誠也音賢一山田泰裕

日本物理学会2018年秋季大会 Sep 2018

Electron spin polarization in the quantum Hall system under optical vortex irradiation

J. Tsustumi K. Oto Y. Yamada H. Mino T. Omatsu

The Second Symposium of Chiral Molecular Science and Technology in Chiba University Jan 2018

配列 GaN ナノコラムが与える GaN/AlGaN 2 次元電子系へのポテンシャル変調

宮地晴子音賢一中岡俊裕石沢峻介岸野克巳

強磁場コラボラトリーが拓く未踏計測領域への挑戦と物質・材料科学の最先端 Nov 2017

光渦照射での量子ホール2次元電子系における電子スピン分極

堤純一音賢一三野弘文山田泰裕尾松孝茂

強磁場コラボラトリーが拓く未踏計測領域への挑戦と物質・材料科学の最先端 Nov 2017

量子ホール効果ブレークダウンによる動的核スピン偏極の磁気光学 Kerr 効果を用いた観測

石橋陵駕色部潤音賢一熊田倫雄平山祥郎

強磁場コラボラトリーが拓く未踏計測領域への挑戦と物質・材料科学の最先端 Nov 2017

ポスター発表賞（強磁場フォーラム H29/11/30）受賞

Teaching Experience

12 3 >

先進理化学専攻特別講義Ib (千葉大学)

実験で体験する物理B 分担２コマ (千葉大学)

実験で体験する物理分担３コマ (千葉大学)

量子輸送物性特論 (千葉大学)

特別演習? (千葉大学)

Professional Memberships

応用物理学会

日本物理学会

Research Projects

<1 234 5 >

量子ホール電子スピンイメージングによる半導体ポテンシャルゆらぎの高感度あぶり出し科学研究費補助金(挑戦的萌芽研究)

Project Year: 2012 - 2013

Development of Spin Noise Measurement System through a Kerr RotationFluctuation and Application to Semiconductor Nano-Structure.
Japan Society for the Promotion of Science: Grants-in-Aid for Scientific Research
MURO Kiyofumi KOHORI You OTO Kenichi MINO Hirofumi

Project Year: 2010 - 2012

光磁気カー効果による分数量子ホール電子系のスピン偏極イメージング科学研究費補助金(基盤研究（Ｃ）)

Project Year: 2009 - 2011

Studies of Nanoscale Electronic States by Real Space Imaging in High Magnetic Fields
Japan Society for the Promotion of Science: Grants-in-Aid for Scientific Research
KOBAYASHI Norio TAMEGAI Tsuyoshi HANAGURI Tetsuo MACHIDA Kazusige OTO Kenichi NISHIZAKI Terukazu

Project Year: 2005 - 2009

Potential fluctuation and the domain structure of electronic state in two-dimensional electron systems investigated by the quantum Hall effect
Japan Society for the Promotion of Science: Grants-in-Aid for Scientific Research
OTO Kenichi MURO Kiyofumi

Project Year: 2007 - 2008