PAPERS

2020

“Nanoscale imaging of unusual photo-acoustic waves in thin flake VTe2”

Asuka Nakamura, Takahiro Shimojima, Yusuke Chiashi, Manabu Kamitani, Hideaki Sakai, Shintaro Ishiwata, Han Li, and Kyoko Ishizaka
Nano Letters in press

“Switching of band inversion and topological surface states by charge density wave”

N. Mitsuishi, Y. Sugita, M. S. Bahramy, M. Kamitani, T. Sonobe, M. Sakano, T. Shimojima, H. Takahashi, H. Sakai, K. Horiba, H. Kumigashira, K. Taguchi, K. Miyamoto, T. Okuda, S. Ishiwata, Y. Motome, and K. Ishizaka
Nat. Commun. 11, 2466 (2020). [selected as FOCUS]

“Large Magneto-piezoelectric Effect in EuMnBi2 Single Crystal at Low Temperatures”

Yuki Shiomi, Hidetoshi Masuda, Hidefumi Takahashi, and Shintaro Ishiwata
Sci. Rep. 10, 7574 (2020).

Prediction of perovskite-related structures in ACuO3-x (A = Ca, Sr, Ba, Sc, Y, La) using density functional theory and Bayesian optimization

Atsuto Seko and Shintaro Ishiwata
Phys. Rev. B
101, 134101 (2020) [selected as Editors’ Suggestion]

“Field-induced spin reorientation in the antiferromagnetic Dirac material EuMnBi2 revealed by neutron and resonant x-ray diffraction”

H. Masuda, H. Sakai, H. Takahashi, Y. Yamasaki, A. Nakao, T. Moyoshi, H. Nakao, Y. Murakami, T. Arima, and S. Ishiwata
Phys. Rev. B
101, 174411 (2020).

“Emergent topological spin structures in centrosymmetric cubic perovskite SrFeO3”

S. Ishiwata, T. Nakajima, J. -H. Kim, D. S. Inosov, N. Kanazawa, J. S. White, J. L. Gavilano, R. Georgii, K. M. Seemann, G. Brandl, P. Manuel, D. D. Khalyavin, S. Seki, Y. Tokunaga, M. Kinoshita, Y. W. Long, Y. Kaneko, Y. Taguchi, T. Arima, B. Keimer, and Y. Tokura
Phys. Rev.
B 101, 134406 (2020) [selected as Editors’ Suggestion]


2019

Giant enhancement of cryogenic thermopower by polar structural instability in a pressurized semimetal MoTe2

H. Takahashi, K. Hasegawa, T. Akiba, H. Sakai, M. S. Bahramy and S. Ishiwata
Phys. Rev. B
, 100, 195130 (2019).

High pressure synthesis of quasi-one-dimensional GdFeO3-type perovskite PrCuO3 with nearly divalent Cu ions

M. Ito, H. Takahashi, H. Sakai, H. Sagayama, Y. Yamasaki, Y. Yokoyama, H. Setoyama, H. Wadati, K. Takahashi, Y. Kusano and S. Ishiwata
Chem. Commun.
, 55, 8931 (2019) [Invited Feature Article for “Perovskites”]

“Observation of a Magnetopiezoelectric Effect in the Antiferromagnetic Metal EuMnBi2”

Y. Shiomi, H. Watanabe, H. Masuda,  H. Takahashi, Y. Yanase, and S. Ishiwata
Phys. Rev. Lett. 122, 127207 (2019).


2018

Impact of antiferromagnetic order on Landau level splitting of quasi-two-dimensional Dirac fermions in EuMnBi2” 

H. Masuda, H.Sakai, M. Tokunaga, M. Ochi, H. Takahashi, K. Akiba, A. Miyake, K. Kuroki, Y. Tokura, S. Ishiwata
Phys. Rev. B 98, 161108(R) (2018).

Negative-pressure-induced helimagnetism in ferromagnetic cubic perovskites Sr1-xBaxCoO3” 

H. Sakai, S. Yokoyama, A. Kuwabara, J. S. White, E. Canevet, H. M. Ronnow, T. Koretsune, R. Arita, A. Miyake, M. Tokunaga, Y. Tokura, S. Ishiwata 
Phys. Rev. Mater. 2, 104412 (2018).
OPEN ACCESS

“Giant Piezoelectric Response in Superionic Polar Semiconductor” 

Y. Shiomi, T. Akiba, H. Takahashi, S. Ishiwata 
Adv. Electron. Mater. 1800174(2018).

“Evaluation of photo-induced shear strain in monoclinic VTe2 by ultrafast electron diffraction” 

A. Nakamura, T. Shimojima, M. Matsuura, Y. Chiashi, M. Kamitani, H. Sakai, S. Ishiwata, H. Li, A. Oshiyama, K. Ishizaka 
Appl. Phys. Express 11, 092601 (2018).

“Enhanced thermopower via spin-state modification” 

H. Takahashi, S.Ishiwata, R. Okazaki, Y. Yasui, and I. Terasaki 
Phys. Rev. B 98, 024405 (2018).

「SACLAを用いた時間分解透過型X線回折による1T’-MoTe2の格子ダイナミクス観測」

下志万貴博,中村飛鳥,石坂香子,田中良和,田久保耕,平田靖透,和達大樹,山本達,松田巌,池浦晃至,高橋英史,酒井英明,石渡晋太郎,富樫格,大和田成起,片山哲夫,登野健介,矢橋牧名,辛埴 
X線分析の進歩 49, (2018).


2017

“Optical Magnetoelectric Resonance in a Polar Magnet (Fe,Zn)2Mo3O8 with Axion-Type Coupling” 

T. Kurumaji, Y. Takahashi, J. Fujioka, R. Masuda, H. Shishikura, S. Ishiwata, and Y. Tokura 
Phys. Rev. Lett. 119, 077206 (2017).

“Giant thermal Hall effect in multiferroics” 

T. Ideue, T.Kurumaji, S. Ishiwata, Y. Tokura 
Nat. Mater. 16, 797 (2017).

“High-pressure synthesis of an unusual antiferromagnetic metal CaCoO3 with GdFeO3-type perovskite structure”

T. Osaka, H. Takahashi, H. Sagayama, Y. Yamasaki, and S. Ishiwata 
Phys. Rev. B  95, 224440 (2017)

“Electromagnon resonance in a collinear spin state of the polar antiferromagnet Fe2Mo3O8” 

T. Kurumaji, Y. Takahashi, J. Fujioka, R. Masuda, H. Shishikura, S. Ishiwata, and Y. Tokura 
Phys. Rev. B  95, 020405 (2017)

“Diagonal magnetoelectric susceptibility and effect of Fe doping in the polar ferrimagnet Mn2Mo3O8”

T. Kurumaji, S. Ishiwata, and Y. Tokura 
Phys. Rev. B  95, 045142 (2017)

“Observation of spin-polarized bands and domain-dependent Fermi arcs in polar Weyl semimetal MoTe2”

M. Sakano, M. S. Bahramy, H. Tsuji, I. Araya, K. Ikeura, H. Sakai, S. Ishiwata, K. Yaji, K. Kuroda, A. Harasawa, S. Shin, and K. Ishizaka 
Phys. Rev. B  95, 121101(R) (2017)

“Anticorrelation between polar lattice instability and superconductivity in the Weyl semimetal candidate MoTe2”

H. Takahashi, T. Akiba, K. Imura, T. Shiino, K. Deguchi, N. K. Sato, H. Sakai, M. S. Bahramy, and S. Ishiwata
Phys. Rev. B  95, 100501(R) (2017)

2016

“Critical enhancement of thermopower in a chemically tuned polar semimetal MoTe2”

H. Sakai, K. Ikeura, M. S. Bahramy, N. Ogawa, D. Hashizume, J. Fujioka, Y. Tokura, and S. Ishiwata
Science Advances 2, e1601378 (2016).

“Contrasting magnetic behaviors in Rh- and Ru-doped cubic perovskite SrFeO3: nearly ferromagnetic metal vs. spin-glass insulator”

M. Kinoshita, H. Sakai, N. Hayashi, Y. Tokura, M. Takano, and S. Ishiwata 
Angew. Chem. Int. Ed. 55, 15292 (2016).

“Relation between the structural phase transition and superconductivity in CuxIrTe2-ySey”

M. Kamitani, H. Sakai, Y. Tokura, and S. Ishiwata 
Phys. Rev. B 94, 134507 (2016).

“Colossal Seebeck effect enhanced by quasi-ballistic phonons dragging massive electrons in FeSb2”

H. Takahashi, R. Okazaki, S. Ishiwata, H. J. Taniguchi, A. Okutani, M. Hagiwara, and I. Terasaki. 
Nature Communications 7, 12732 (2016).

“Magnetic Reversal of Electric Polarization with Fixed Chirality of Magnetic Structure in a Chiral-Lattice Helimagnet MnSb2O6”

M. Kinoshita, S. Seki, T. J. Sato, Y. Nambu, T.Hong, M. Matsuda, H. B. CaO, S. Ishiwata, and Y. Tokura. 
Phys. Rev. Lett. 117, 047201 (2016).

“Revealing the ultrafast light-to-matter energy conversion before heat diffusion in a layered Dirac semimetal”

Y. Ishida, H. Masuda, H. Sakai,  S. Ishiwata, and S. Shin. 
Phys. Rev. B 93, 100302(R) (2016).

“Quantum Hall effect in a bulk antiferromagnet EuMnBi2 with magnetically confined two-dimensional Dirac fermions”

H. Masuda, H. Sakai, M. Tokunaga, Y. Yamasaki, A. Miyake, J. Shiogai, S. Nakamura, S. Awaji, A. Tsukazaki, H. Nakao, Y. Murakami, T. Arima, Y. Tokura, and S. Ishiwata. 
Science Advances 2, e1501117 (2016).

“Electromagnon excitation in the field-induced noncollinear ferrimagnetic phase of Ba2Mg2Fe12O22 studied by polarized inelastic neutron scattering and terahertz time-domain optical spectroscopy”

T. Nakajima, Y. Takahashi, S. Kibayashi, M. Matsuda, K. Kakurai, S. Ishiwata, Y. Taguchi, Y. Tokura, and T. Arima 
Phys. Rev. B 93, 035119 (2016).

2015

“Doping-Tunable Ferrimagnetic Phase with Large Linear Magnetoelectric Effect in a Polar Magnet Fe2Mo3O8”

T. Kurumaji, S. Ishiwata, and Y. Tokura 
Phys. Rev. X 5, 031034 (2015).

“Observation of a Devil’s Staircase in the Novel Spin-Valve System SrCo6O11”

T. Matsuda, S. Partzsch, T. Tsuyama, E. Schierle, E. Weschke, J. Geck, T. Saito, S. Ishiwata, Y. Tokura, and H. Wadati 
Phys. Rev. Lett. 114, 236403 (2015).

“Intrinsic effects of substitution and intercalation on thermal transport in two-dimensional TiS2 single crystals”

R. Daou, H. Takahashi, S. Hebert, M. Beaumale, E. Guilmeau, and A. Maignan. 
Journal of Applied Physics 117, 165101 (2015).

“Rich structural phase diagram and thermoelectric properties of layered tellurides Mo1-xNbxTe2”

K. Ikeura, H. Sakai, M. S. Bahramy and S. Ishiwata 
APL Mat. 3, 041514 (2015).

2014

“Anomalous domain-wall conductance in pyrochlore-type Nd2Ir2O7 on the verge of the metal-insulator transition”

K. Ueda, J. Fujioka, Y. Takahashi, T. Suzuki, S. Ishiwata, Y. Taguchi, M. Kawasaki, and Y. Tokura 
Phys. Rev. B 89, 075127 (2014).

“Insulator-to-Superconductor Transition upon Electron Doping in a BiS2-Based Superconductor Sr1-xLaxFBiS2”

H. Sakai, D. Kotajima, K. Saito, H. Wadati, Y. Wakisaka, M. Mizumaki, K. Nitta, Y. Tokura, and S. Ishiwata 
J. Phys. Soc. Jpn. 83, 014709 (2014). (Selected as Editors’ Choice)

2013

“Microwave magnetoelectric effect via skyrmion resonance modes in a helimagnetic multiferroic”

Y. Okamura, F. Kagawa, M. Mochizuki, M. Kubota, S. Seki, S. Ishiwata, M. Kawasaki, Y. Onose and Y. Tokura 
Nature Commun. 4, 2391(6 pages) (2013).

“Multiple helimagnetic phases and topological Hall effect in epitaxial thin films of pristine and Co-doped SrFeO3”

S. Chakraverty, T. Matsuda, H. Wadati, J. Okamoto, Y. Yamasaki, H. Nakao, Y. Murakami, S. Ishiwata, M. Kawasaki, Y. Taguchi, Y. Tokura, and H. Y. Hwang 
Phys. Rev. B 88, 220405(R) (2013)

“Towards control of skyrmion crystals in helimagnetic alloys by spin-orbit coupling”

K. Shibata, X. Z. Yu, T. Hara, D. Morikawa, N. Kanazawa, K. Kimoto, S. Ishiwata, Y. Matsui and Y. Tokura 
Nature Nanotech. 8, 723 (2013).

“Optimal Tc for the electron-doped cuprate realized under high pressure”

S. Ishiwata, D. Kotajima, N. Takeshita, C. Terakura, S. Seki, Y. Tokura, 
J. Phys. Soc. Jpn. 82, 063705 (2013).

“Superconductivity in CuxIrTe2 driven by interlayer hybridization”

M. Kamitani, M. S. Bahramy, R. Arita, S. Seki, T. Arima, Y. Tokura, and S. Ishiwata, 
Phys. Rev. B 87, 180501(R) (2013). (Selected as Editors’ suggestion)

“Extremely high electron mobility in a phonon-glass semimetal”

S. Ishiwata, Y. Shiomi, J. S. Lee, M. S. Bahramy, T. Suzuki, M. Uchida, R. Arita, Y. Taguchi, and Y. Tokura 
Nat. Mater. 12, 512-517 (2013).

“Magnetoelectric responses induced by domain rearrangement and spin structural change in triangular-lattice helimagnets NiI2 and CoI2”

T. Kurumaji, S. Seki, S. Ishiwata, H. Murakawa, Y. Kaneko, and Y. Tokura 
Phys. Rev. B 87, 014429 (2013).

2012

“Possible skyrmion-lattice ground state in the B20 chiral-lattice magnet MnGe as seen via small-angle neutron scattering”

N. Kanazawa, J.-H. Kim, D. S. Inosov, J. S. White, N. Egetenmeyer, J. L. Gavilano, S. Ishiwata, Y. Onose, T. Arima, B. Keimer, and Y. Tokura 
Phys. Rev. B 86, 134425 (2012). (Selected as Editor’s suggestion)

“Variation of Charge Dynamics in the Course of Metal-Insulator Transition for Pyrochlore-type Nd2Ir2O7”

K. Ueda, J. Fujioka, Y. Takahashi, T. Suzuki, S. Ishiwata, Y. Taguchi, and Y. Tokura 
Phys. Rev. Lett. 109, 136402 (2012).

“Evolution of magnetic phases in single crystals of SrFe1-xCoxO3 solid solution”

Y. W. Long, Y. Kaneko, S. Ishiwata, Y. Tokunaga, T. Matsuda, H. Wadati, Y. Tanaka, S. Shin, Y. Tokura, and Y. Taguchi 
Phys. Rev. B 86, 064436 (2012).

“Magnetoelectric nature of skyrmions in a chiral magnetic insulator Cu2OSeO3”

S. Seki, S. Ishiwata, and Y. Tokura 
Phys. Rev. B 86, 060403 (2012).

“Observation of Magnetic Excitations of Skyrmion Crystal in a Helimagnetic Insulator Cu2OSeO3”

Y. Onose, Y. Okamura, S. Seki, S. Ishiwata, and Y. Tokura 
Phys. Rev. Lett. 109, 037603 (2012).

“Formation and rotation of skyrmion crystal in the chiral-lattice insulator Cu2OSeO3”

S. Seki, J.-H. Kim, D. S. Inosov, R. Georgii, S. Ishiwata, B. Keimer, and Y. Tokura 
Phys. Rev. B 85, 220406 (2012).

“Observation of Skyrmions in a Multiferroic Material”

S. Seki, X. Z. Yu, S. Ishiwata, and Y. Tokura 
Science 336, 198 (2012).

“Variation of charge dynamics upon the helimagnetic and metal-insulator transitions for perovskite AFeO3 (A=Sr and Ca)”

J. Fujioka, S. Ishiwata, Y. Kaneko, Y. Taguchi, and Y. Tokura 
Phys. Rev. B 85, 155141 (2012).

“Effect of lattice geometry on magnon Hall effect in ferromagnetic insulators”

T. Ideue, Y. Onose, H. Katsura, Y. Shiomi, S. Ishiwata, N. Nagaosa, and Y. Tokura 
Phys. Rev. B 85, 134411 (2012). (Selected as Editor’s suggestion)

“Band-filling dependence of thermoelectric properties in B20-type CoGe”

N. Kanazawa Y. Onose, Y. Shiomi, S. Ishiwata, and Y. Tokura 
Appl. Phys. Lett. 100, 093902 (2012).

“Topological Hall effect in pyrochlore lattice with diluted spin chirality”

K. Ueda, S. Iguchi, T. Suzuki, S. Ishiwata, Y. Taguchi, and Y. Tokura 
Phys. Rev. Lett. 108, 156601 (2012).

“Emergent phenomena in perovskite-type manganites”

Y. Taguchi, H. Sakai, D. Okuyama, S. Ishiwata, J. Fujioka, T. Fukuda, D. Hashizume, F. Kagawa, Y. Takahashi, R. Shimano, Y.Tokunaga, Y.Kaneko, A.Nakao, H. Nakao, Y. Murakami, K.Sugimoto, M.Takata, K.Yamauchi, S.Picozzi, A.Q.R.Baron, T. Arima, Y. Tokura 
Phys. Rev. Lett. 108, 156601 (2012).

2011

“High-Pressure Hydrothermal Crystal Growth and Multiferroic Properties of a Perovskite YMnO3”

S. Ishiwata, Y. Tokunaga, Y. Taguchi, and Y. Tokura 
J. Am. Chem. Soc. 133, 13818–13820 (2011) (Communication)

“Mott insulator to metal transition in filling-controlled SmMnAsO1−x”

Y. Shiomi, S. Ishiwata, Y. Taguchi, and Y. Tokura 
Phys. Rev. B.84, 054519 (2011) (Selected as Editor’s suggestion)

“Magnetically-Driven Ferroelectric Atomic Displacements in perovskite like YMnO3”

D. Okuyama, S. Ishiwata, Y. Takahashi, K. Yamauchi, S. Picozzi, K. Sugimoto, H. Sakai, M. Takata, R. Shimano, Y. Taguchi, T. Arima, and Y. Tokura 
Phys. Rev. B.84, 054440 (2011)

“Versatile helimagnetic phases under magnetic fields in cubic perovskite SrFeO3”

S. Ishiwata, M. Tokunaga, Y. Kaneko, D. Okuyama, Y. Tokunaga, S. Wakimoto, K. Kakurai, T. Arima, Y. Taguchi, and Y. Tokura 
Phys. Rev. B. 84, 054427 (2011)

“Colossal negative thermal expansion in BiNiO3 induced by intermetallic charge transfer”

M. Azuma, Wei-tin Chen, H. Seki, M. Czapski, S. Olga, K. Oka, M. Mizumaki, T. Watanuki, N. Ishimatsu, N. Kawamura, S. Ishiwata, M. G. Tucker, Y. Shimakawa and J. P. Attfield 
Nature Commun. 2, 347 (2011).

“Synthesis of cubic SrCoO3 single crystal and its anisotropic magnetic and transport properties”

Y. Long, Y. Kaneko, S. Ishiwata, Y. Taguchi, Y. Tokura 
J. Phys.: Condens. Matter  23, 245601 (2011).

“Large topological Hall effect in a short-period helimagnet MnGe”

N. Kanazawa, Y. Onose, T. Arima, D. Okuyama, K. Ohoyama, S. Wakimoto, K. Kakurai, S. Ishiwata, and Y. Tokura 
Phys. Rev. Lett. 106, 156603 (2011).

“Magnetic-field induced competition of two multiferroic orders in a triangular-lattice helimagnet MnI2”

T. Kurumaji, S. Seki, S. Ishiwata, H. Murakawa, Y. Tokunaga, Y. Kaneko, and Y. Tokura 
Phys. Rev. Lett. 106, 167206 (2011).

“Orbital Ordering of Intermediate-Spin State of Co3+ in Sr3YCo4O10.5 “

H. Nakao, T. Murata, D. Bizen , Y. Murakami, K. Ohoyama, K. Yamada, S. Ishiwata, W. Kobayashi, and I. Terasaki 
J. Phys. Soc. Jpn. 80, 023711 (2011) (Selected as Editors’ Choice)

“Gigantic terahertz magnetochromism via electromagnons in the hexaferrite magnet Ba2Mg2Fe12O22”

N. Kida, S. Kumakura, S. Ishiwata, Y. Taguchi, Y. Tokura 
Phys. Rev. B 83, 064422 (2011).

“Uniaxial Colossal Magnetoresistance in the Ising Magnet SrCo12O19”

S. Ishiwata, T. Nakano, I. Terasaki, Y. Uwatoko, H. Nakao, Y. Murakami, M. Takano 
Phys. Rev. B  83, 020401(R) (2011).

“Near room-temperature formation of a skyrmion crystal in thin-films of the helimagnet FeGe”

X. Z. Yu, N. Kanazawa, Y. Onose, K. Kimoto, W.Z. Zhang, S. Ishiwata, Y. Matsui, and Y. Tokura 
Nature Materials 10, 106-109 (2011).

2010

“Multiferroic M-type hexaferrites with room-temperature conical state and magnetically controllable spin helicity”

Y. Tokunaga, Y. Kaneko, D. Okuyama, S. Ishiwata, T. Arima, S. Wakimoto, K. Kakurai, Y. Taguchi, and Y. Tokura 
Physical Review Letters, 105, 257201 (2010).

“Electrons doped in cubic perovskite SrMnO3: isotropic metal versus chainlike ordering of Jahn-Teller polarons”

H. Sakai, S. Ishiwata, D. Okuyama1 , A. Nakao, H. Nakao, Y. Murakami, Y. Taguchi, and Y. Tokura 
Phys. Rev. B  82, 180409(R) (2010).

“Synthesis, Structure, and Physical Properties of A-site Ordered Perovskites ACu3Co4O12 (A=Ca and Y)”

I. Yamada, S. Ishiwata, I. Terasaki, M. Azuma, Y. Shimakawa, and M. Takano 
Chem. Mater. 22, 5328 (2010).

“Cupric chloride CuCl2 as an S = 1/2 chain multiferroic”

S. Seki, T. Kurumaji, S. Ishiwata, H. Matsui, H. Murakawa, Y. Tokunaga, Y. Kaneko, T. Hasegawa, and Y. Tokura 
Phys. Rev. B 82, 064424 (2010).

“Neutron diffraction studies on the multiferroic conical magnet Ba2Mg2Fe12O22”

S. Ishiwata, D. Okuyama, K. Kakurai, M. Nishi, Y. Taguchi, Y. Tokura, 
Phys. Rev. B, 81, 174418 (2010)

“Electromagnons in the multiferroic state of perovskite manganites with symmetric exchange striction”

Y. Takahashi, S. Ishiwata, S. Miyahara, Y. Kaneko, N. Furukawa, Y. Taguchi, R. Shimano, and Y. Tokura 
Phys. Rev. B 81, 100413(R) (2010)

“Perovskite Manganites Hosting Versatile Multiferroic Phases with Symmetric and Antisymmetric Exchange Strictions”

S. Ishiwata, Y. Kaneko, Y. Tokunaga, Y. Taguchi, T. Arima, and Y. Tokura 
Phys. Rev. B 81, 100411(R) (2010)

“Single crystal growth and structure of La4Cu3MoO12”

J. A. Enterkin, P. A. Maggard, S. Ishiwata, L. D. Marks, K. R. Poeppelmeier, M. Azuma, M. Takano 
J. Solid State Chem. 183, 551-556 (2010).