publications

H. Nishino, K. Kobayashi, Y. Honjo, T. Nishiyama Hiraki, K. Ozaki, Y. Imai, M. Yamaga, Y. Joti, N. Nagasawa, Y. Yoda, A. Q.R. Baron, M. Kobayashi, M. Saito, T. Hatsui

Nucl. Instrum. Methods Phys. Res. A. 1057, 168710 (2023).

"Development of Multi-scale Soft X-ray Diffraction Microscope for Observing Spin Textures"

Y. Ishii, Y. Kozuka, Y. Yamasaki, and H. Nakao

JPS Conf. Proc. 38, 011190 (2023). Proceedings of the 29th International Conference on Low Temperature Physics (LT29).

"Quantitative measurement of structural fluctuation at LaNiO3/LaAlO3 interfaces as a function of thickness"

K. Nagai, M. Anada, K. Kowa, M. Kitamura, H. Kumigashira, H. Tajiri, and Y. Wakabayashi

Phys. Rev. Materials 7, 043604 (2023).

2022年度

"有機半導体のフォノン分散"

若林裕助，濱田幾太郎，筒井智嗣,

物理学会誌 78, 135-138 (2023). (cover illustration)

"Time-resolved resonant soft X-ray scattering combined with MHz synchrotron X-ray and laser pulses in the Photon Factory"

R. Fukaya, J. Adachi, H. Nakao, Y. Yamasaki, C. Tabata, S. Nozawa, K. Ichiyanagi, Y. Ishii, H. Kimura and S. Adachi

J. Synchrotron Rad. 29, (2022).

プレスリリース

"放射光メスバウアー時間領域干渉計法が明らかにする原子・分子のナノ‐マイクロ秒ダイナミクス"

齋藤真器名、山口毅、長尾道弘、

日本物理学会誌 77, 690 (2022).

"放射光時間領域干渉計を用いたガラスの構造緩和を支配するJohari-Goldstein緩和過程の研究"

齋藤真器名, 金谷利治,

放射光 35, 295, (2022).

"Microscopic observation of the effects of elongation on the polymer chain dynamics of crosslinked polybutadiene using quasi-elastic γ-ray scattering"

R. Mashita, M. Saito, Y. Yoda, H. Kishimoto, M. Seto and T. Kanaya

J. Synchrotron Rad. 29, 1180 (2022).

"Light-induced magnetization driven by interorbital charge motion in the spin-orbit assisted Mott insulator α-RuCl3"

T. Amano, Y. Kawakami, H. Itoh, K. Konno, Y. Hasegawa, T. Aoyama, Y. Imai, K. Ohgushi, Y. Takeuchi, Y. Wakabayashi, K. Goto, Y. Nakamura, H. Kishida, K. Yonemitsu, and S. Iwai

Phys. Rev. Research 4, L032032 (2022).

"Phonon dispersion of the organic semiconductor rubrene"

K.Takada, K.Yoshimi, S.Tsutsui, K.Kimura, K.Hayashi, I.Hamada, S.Yanagisawa, N.Kasuya, S.Watanabe, J.Takeya, and Y.Wakabayashi

Phys. Rev. B 105, 205205 (2022). Editors’ Suggestion

SPring-8/SACLA Research Frontiers 2022

2021年度

"表面X線回折の進展"

若林裕助

日本結晶学会誌 64, 26-32 (2022).

"Microscopic observation of hidden Johari-Goldstein-β process in glycerol"

Makina Saito, Masayuki Kurokuzu, Yoshitaka Yoda, and Makoto Seto

Phys. Rev. E 105, L012605 (2022).

"Topological charge of soft X-ray vortex beam determined by inline holography"

Yuta Ishii, Hironori Nakao, Masaichiro Mizumaki, Yusuke Wakabayashi, Taka-hisa Arima, and Yuichi Yamasaki

Scientific Reports 12, 1044 (2022).

"Effect of silica-nanoparticle fillers on the Johari-Goldstein-β process in polymer nanocomposites"

M. Saito, R. Mashita, T. Kanaya, H. Kishimoto, Y. Yoda, M. Seto

Hyperfine Interact. 242, 58 (2021).

"Relationship between Viscosity and Acyl Tail Dynamics in Lipid Bilayers"

M. Nagao, E. G. Kelley, A. Faraone, M. Saito, Y. Yoda, M. Kurokuzu, S. Takata, M. Seto, and P. D. Butler

Phys. Rev. Lett. 127, 078102 (2021).

プレスリリース

"Local polarization and valence distribution in LaNiO3/LaMnO3 heterostructures"

M. Anada, S. Sakaguchi, K. Nagai, M. Kitamura, K. Horiba, H. Kumigashira, and Y. Wakabayashi

Phys. Rev. B, 104, 085111 (2021).

"Spin reorientation in tetragonally distorted spinel oxide NiCo2O4 epitaxial films"

H. Koizumi, I. Suzuki, D. Kan, J. Inoue, Y. Wakabayashi, Y. Shimakawa, H. Yanagihara

Phys. Rev. B 104, 014422 (2021).

"Laser oscillation of an organic distributed-feedback laser at the edge of a mini stopband"

T.Miura, T. Kanagasekaran, H.Shimotani, and K. Tanigaki

Appl. Phys. Express 14 052007 (2021).

2020年度

"高速X線反射率測定により錆の形成過程を解明"

若林裕助，藤井宏昌，土井教史

アイソトープニュース　773，47 (2021).

" Soft-X-Ray Vortex Beam Detected by Inline Holography"

Y. Ishii, K. Yamamoto, Y. Yokoyama, M. Mizumaki, H. Nakao, T. Arima, and Y. Yamasaki

Phys. Rev. Applied 14, 064069 (2020).

プレスリリース

"Metallic ground states of undoped Ti2O3 films induced by elongated c-axis lattice constant"

K. Yoshimatsu, N. Hasegawa, Y. Nambu, Y. Ishii, Y. Wakabayashi and H. Kumigashira

Scientific Reports 10, 22109 (2020).

"Multiple magnetic order parameters coexisting in multiferroic hexaferrites resolved by soft x rays"

H. Ueda, Y. Tanaka, Y. Wakabayashi, J. Tsurumi, J. Takeya, and T. Kimura

J. Appl. Phys. 128, 174101 (2020).

"Structure of quasi-free-standing graphene on the SiC (0001) surface prepared by the rapid cooling method"

T. Sumi, K. Nagai, J. Bao, T. Terasawa, W. Norimatsu, M. Kusunoki, and Y. Wakabayashi

Appl. Phys. Lett. 117, 143102 (2020).

“Electronic charge transfer driven by spin cycloidal structure"

Y. Ishii, S. Horio, Y. Noda, M. Hiraishi, H. Okabe, M. Miyazaki, S. Takeshita, A. Koda, K. M. Kojima, R. Kadono, H. Sagayama, H. Nakao, Y. Murakami, and H. Kimura

Phys. Rev. B 101 224436 (2020). Editors’ Suggestion

プレスリリース

"Direct Evidence of Simultaneous Reversal of Ferrimagnetically Coupled Sm 4f and Mn 3d Angular Momenta in SmMnO3"

J.-S. Jung, T. Nakamura, Y. Wakabayashi and T. Kimura

J. Korean Phys. Soc. 76 904-910 (2020). (Highlight)

"Robust surface structure analysis with reliable uncertainty estimation using the exchange Monte Carlo method"

K. Nagai, M. Anada, Y. Nakanishi-Ohno, M. Okada and Y. Wakabayashi

J. Appl. Cryst. 53 387-392 (2020). (corrigendum)

"電流駆動誘起半導体レーザー"

下谷秀和, 谷垣勝己，

応用物理 89, 278-281 (2020).

2019年度

"Tuning of ferrimagnetism and perpendicular magnetic anisotropy in NiCo2O4 epitaxial films by the cation distribution"

Y. Shen, D. Kan, Z. Tan, Y. Wakabayashi, and Y. Shimakawa

Phys. Rev. B 101, 094412 (2020).

"Early stages of iron anodic oxidation: Defective growth and density increase of oxide layer"

Hiromasa Fujii, Yusuke Wakabayashi, and Takashi Doi

Phys. Rev. Materials 4, 033401 (2020).

プレスリリース日刊工業新聞(2020年3月5日) 化学工業日報 (2020年3月31日)

SPring-8/SACLA Research Frontiers 2020

"Sub-molecular structural relaxation at a physisorbed interface with monolayer organic single-crystal semiconductors"

A. Yamamura, H. Fujii, H. Ogasawara, D. Nordlund, O. Takahashi, Y. Kishi, H. Ishii, N. Kobayashi, N. Niitsu, B. Blülle, T. Okamoto, Y. Wakabayashi, S. Watanabe, and J. Takeya

Commun Phys 3, 20 (2020).

プレスリリース日刊工業新聞(2020年1月24日) 日経新聞オンライン EE Times ほか

PF highlights 2019

"Insights into magnetoelectric-coupling mechanism of room-temperature multiferroic Sr3Co2Fe24O41 from domain observation"

H. Ueda, Y. Tanaka, Y. Wakabayashi, and T. Kimura,

Phys. Rev. B, 100, 094444 (2019).

"Correlations between oxygen octahedral distortions and magnetic and transport properties in strained La0.5Sr0.5CoO3 thin films"

Y. Heo, D. Kan, M. Anada, Y. Wakabayashi, H. Tajiri, and Y. Shimakawa,

Phys. Rev. B 99, 174420 (2019).

"Kinetics of Iron Passivation Studied by Sub-Second Resolution Realtime X-ray Reflectivity Technique"

H.Fujii, Y.Wakabayashi, and T.Doi,

J. Electrochem. Soc. 166, E212-E216 (2019).

2018年度

"Surface structure of organic semiconductor [n]phenacene single crystals"

Y.Wakabayashi, M.Nakamura, K.Sasaki, T.Maeda, Y.Kishi, H.Ishii, N.Kobayashi, S.Yanagisawa, Y.Shimo, and Y.Kubozono,

J. Am. Chem. Soc. 140, 14046 (2018).

"Observation of collinear antiferromagnetic domains making use of the circular dichroic charge-magnetic interference effect of resonant x-ray diffraction"

H.Ueda, Y.Tanaka, Y.Wakabayashi, and T.Kimura,

Phys. Rev. B, 98, 134415 (2018).

"Spin-Orbital Entangled Liquid State in the Copper Oxide Ba3CuSb2O9"

H. Man, M. Halim, H. Sawa, M. Hagiwara, Y. Wakabayashi and S. Nakatsuji,

J. Phys.: Condens. Matter, 30 443002-1-17 (2018). (Topical Review)

"Spatial coherence of the insulating phase in quasi-two-dimensional LaNiO3 films"

M. Anada, K. Kowa, H. Maeda, E. Sakai, M. Kitamura, H. Kumigashira, O. Sakata, Y. Nakanishi-Ohno, M. Okada, T. Kimura and Y. Wakabayashi,

Phys. Rev. B, 98, 014105-1-8 (2018).

"Oxygen octahedral distortions in compressively strained SrRuO3 epitaxial thin films"

D. Kan, M. Anada, Y. Wakabayashi, H. Tajiri, and Y. Shimakawa,

J. Appl. Phys. 123, 235303-1-5 (2018). (Editor's pick)

"Structural Switching of Self-Assembled Monolayer by External Electric Field"

H. Fujii, K. Sasaki, Y. Wakabayashi, H. Tajiri, K. Miwa, S. Ono, R. Nouchi,

e-J. Surf. Sci. Nanotech. 16 76-78 (2018).

2017年度

"Observation of Structure of Surfaces and Interfaces by Synchrotron X-ray Diffraction: Atomic-Scale Imaging and Time-Resolved Measurements"

Y. Wakabayashi, T. Shirasawa, W. Voegeli, and T. Takahashi,

J. Phys. Soc. Jpn. 87, 061010-1-12 (2018).

"Bayesian inference of metal oxide ultrathin film structure based on crystal truncation rod measurements"

M. Anada, Y. Nakanishi-Ohno, M. Okada, T. Kimura and Y. Wakabayashi,

J. Appl. Cryst. 50 1611-1616 (2017).

プレスリリース，日刊工業新聞 2017年10月24日

"Non-destructive method for the determination of the electric polarization orientation in thin films: illustration on gallium ferrite thin films"

C. Lefevre, A. Demchenko, C. Bouillet-Ulhaq, M. Luysberg, X. Devaux, F. Roulland, G. Versini, S. Barre, Y. Wakabayashi, N. Boudet, C. Leuvrey, M. Acosta, C. Meny, E. Martin, S. Grenier, V. Favre-Nicolin and N. Viart,

Small Methods, 1, 1700234-1-8 (2017).

"Soft x-ray resonant diffraction study of magnetic structure in magnetoelectric Y-type hexaferrite"

H. Ueda, Y. Tanaka, Y. Wakabayashi, T. Kimura,

Physica B, 536, 118–121 (2018).

日本語の解説記事

若林裕助，濱田幾太郎，筒井智嗣, "有機半導体のフォノン分散", 物理学会誌 78, 135-138 (2023). (cover illustration)
齋藤真器名、山口毅、長尾道弘："放射光メスバウアー時間領域干渉計法が明らかにする原子・分子のナノ‐マイクロ秒ダイナミクス" 日本物理学会誌 77, 690 (2022).
齋藤真器名, 金谷利治："放射光時間領域干渉計を用いたガラスの構造緩和を支配するJohari-Goldstein緩和過程の研究" ，放射光 35, 295, (2022).
若林裕助："表面X線回折の進展" ，日本結晶学会誌 64, 26-32 (2022).
若林裕助，藤井宏昌，土井教史, 高速X線反射率測定により錆の形成過程を解明, アイソトープニュース　773，47 (2021).
石井祐太, 木村宏之, 中尾裕則: 共鳴軟X線散乱を用いたマルチフェロイックスの配位子酸素サイトのスピン偏極観測, PF news 38, 15 (2020).
下谷秀和, 谷垣勝己："電流駆動誘起半導体レーザー" 応用物理 89, 278-281 (2020).
若林裕助，白澤徹郎：高い時間・空間分解能を持つ表面Ｘ線回折を活用した構造物性研究，PF news 37(1), 11 (2019).
若林裕助：フラストレート磁性体Ba3CuSb2O9のスピンと軌道の相関, 放射光 27 166-171 (2014).
若林裕助：表面X線回折による金属酸化物超薄膜の構造解析，まてりあ， 52 554-557 (2013).
若林裕助：有機トランジスタ材料ルブレンの伝導層における分子構造, 放射光 24 19 (2011).
岸本一誠，若林裕助，木村剛：DyVO4における強四極子秩序が誘起する反強誘電的歪み, 日本結晶学会誌 52 239-245 (2010).
柳原英人，若林裕助: 純オゾンを用いて作製したγ-Fe2O3エピタキシャル薄膜の構造と磁気特性，まぐね (日本磁気学会報), 3 180-186 (2008)
若林裕助：低次元構造の観測法---異常分散を利用したX線散漫散乱の解析, 放射光 20, 26-32 (2007).
若林裕助：層状Mn酸化物中の電荷秩序・軌道秩序の発達過程, 日本結晶学会誌 44 295-301 (2002).

代表的な成果

●情報科学を活用した表面構造解析手法の開発

Robust surface structure analysis with reliable uncertainty estimation using the exchange Monte Carlo method

K. Nagai, M. Anada, Y. Nakanishi-Ohno, M. Okada and Y. Wakabayashi

J. Appl. Cryst. 53 387-392 (2020).

論文概要：

Bayesian inference of metal oxide ultrathin film structure based on crystal truncation rod measurements

M. Anada, Y. Nakanishi-Ohno, M. Okada, T. Kimura and Y. Wakabayashi

J. Appl. Cryst. 50 1611-1616 (2017).

プレスリリース

日刊工業新聞 2017 10/24

論文概要：

●有機半導体表面の構造観測

Sub-molecular structural relaxation at a physisorbed interface with monolayer organic single-crystal semiconductors

A. Yamamura, H. Fujii, H. Ogasawara, D. Nordlund, O. Takahashi, Y. Kishi, H. Ishii, N. Kobayashi, N. Niitsu, B. Blülle, T. Okamoto, Y. Wakabayashi, S. Watanabe, and J. Takeya

Commun Phys 3, 20 (2020).

プレスリリース

Summary:

Surface structure of organic semiconductor [n]phenacene single crystals

Y.Wakabayashi, M.Nakamura, K.Sasaki, T.Maeda, Y.Kishi, H.Ishii, N.Kobayashi, S.Yanagisawa, Y.Shimo, and Y.Kubozono

J. Am. Chem. Soc. 140, 14046 (2018).

Photon Factory highlights 2018

論文概要：

Large surface relaxation in the organic semiconductor tetracene

H. Morisaki, T. Koretsune, C. Hotta, J. Takeya, T. Kimura and Y. Wakabayashi

Nature Commun. 5, 5400 (2014).

プレスリリース

JST Science Portal 2014年11月10日

論文概要：

Sub-Å resolution electron density analysis of the surface of organic rubrene crystals

Y. Wakabayashi, J. Takeya, and T. Kimura

Phys. Rev. Lett. 104, 066103 (2010).

News@KEK

日刊工業新聞 2010年1月29日

日経産業新聞 2010年2月9日

科学新聞 2010年3月12日

PFアクティビティレポート2009 Highlights

論文概要：

●有機半導体の格子振動

Phonon dispersion of the organic semiconductor rubrene

K.Takada, K.Yoshimi, S.Tsutsui, K.Kimura, K.Hayashi, I.Hamada, S.Yanagisawa, N.Kasuya, S.Watanabe, J.Takeya, and Y.Wakabayashi

Phys. Rev. B 105, 205205 (2022). Editors’ Suggestion

物理学会誌 78, 135-138 (2023). (cover illustration)

論文概要：

●強相関物質薄膜，表面における電子状態の研究

Spatial coherence of the insulating phase in quasi-two-dimensional LaNiO3 films

M. Anada, K. Kowa, H. Maeda, E. Sakai, M. Kitamura, H. Kumigashira, O. Sakata, Y. Nakanishi-Ohno, M. Okada, T. Kimura and Y. Wakabayashi

Phys. Rev. B 98, 014105-1-8 (2018).

論文概要：

Structural comparison of n-type and p-type LaAlO3/SrTiO3 Interfaces

R. Yamamoto, C. Bell, Y. Hikita, H.Y. Hwang, H. Nakamura, T. Kimura, and Y. Wakabayashi

Phys. Rev. Lett 107 036104 (2011).

PFアクティビティレポート2011 Highlights

論文概要：

Size of Orbital Ordering Domain Controlled by the Itinerancy of the 3d Electrons in a Manganite Thin Film

Y. Wakabayashi, H. Sagayama, T. Arima, M. Nakamura, Y. Ogimoto, Y. Kubo, K. Miyano and H. Sawa

Phys. Rev. B 79 22040(R) (2009).

論文概要：

Surface effects on the orbital order in the single-layered manganite La0.5Sr1.5MnO4,

Y. Wakabayashi, M. H. Upton, S. Grenier, J. P. Hill, C. S. Nelson, J.-W. Kim, P. J. Ryan, A. I. Goldman, H. Zheng and J. F. Mitchell:

Nature Materials 6, 972-976 (2007).

論文概要：

Novel Orbital Ordering induced by Anisotropic Stress in a Manganite Thin Film,

Y. Wakabayashi, D. Bizen, H. Nakao, Y. Murakami, M. Nakamura, Y. Ogimoto, K. Miyano and H. Sawa,

Phys. Rev. Lett., 96 (2006), 017202.

PFアクティビティレポート2005 Highlights

論文概要：

●フラストレート磁性体に見られるスピン軌道共鳴状態

Dynamical spin-orbital correlation in the frustrated magnet Ba3CuSb2O9,

Y. Ishiguro, K. Kimura, S. Nakatsuji, S. Tsutsui, A. Q. R. Baron T. Kimura, and Y. Wakabayashi,

Nature Communications 4, 2022-1-6 (2013).

プレスリリース

論文概要：

Chemical and orbital fluctuations in Ba3CuSb2O9,

Y. Wakabayashi, D. Nakajima, Y. Ishiguro, K. Kimura, T. Kimura, S. Tsutsui, A. Q. R. Baron,

K. Hayashi, N. Happo, S. Hosokawa, K. Ohwada, and S. Nakatsuji,

Phys. Rev. B 93, 245117 (2016).

論文概要：

●固液界面の現象

External electric field dependence of the structure of the electric double layer at an ionic liquid/Au interface,

R. Yamamoto, H. Morisaki, O. Sakata, H. Shimotani, H.-T. Yuan, Y. Iwasa, T. Kimura, and Y. Wakabayashi,

Appl. Phys. Lett. 101, 053122 (2012).

論文概要：

Kinetics of Iron Passivation Studied by Sub-Second Resolution Realtime X-ray Reflectivity Technique

H.Fujii, Y.Wakabayashi, and T.Doi,

J. Electrochem. Soc. 166, E212-E216 (2019).

論文概要：

"Early stages of iron anodic oxidation: Defective growth and density increase of oxide layer"

Hiromasa Fujii, Yusuke Wakabayashi, and Takashi Doi

Phys. Rev. Materials 4, 033401 (2020).

プレスリリース日刊工業新聞(2020年3月5日) 化学工業日報 (2020年3月31日)

●擬一次元金属錯体の構造の乱れに関する研究

Direct Determination of Low-Dimensional Structures --- Synchrotron X-ray scattering on One-Dimensional Charge-Ordered MMX-Chain Complexes

Y. Wakabayashi, A. Kobayashi, H. Sawa, H. Ohsumi, N. Ikeda, and H. Kitagawa

J. Am. Chem. Soc., 128 (2006), 6676.

PFアクティビティレポート2006 Highlights

論文概要：

Spatial Correlations in the Valence of Metal Ions in Ni1-xPdx(chxn)2Br3

Y.Wakabayashi, N.Wakabayashi, M.Yamashita, T.Manabe and N.Matsushita

J.Phys.Soc.Jpn. 68(1999) , 3948

論文概要：

論文紹介画像はwordleに論文の全文を読みこませて作成しました。