Correlated Electron Research Group (CERG), RIKEN Advanced Science Institute

## All |
## FY 2010 |
## FY 2011 |
## FY 2012 |

Publications

- * N. Kida, S. Kumakura, S. Ishiwata, Y. Taguchi, and Y. Tokura

"Gigantic terahertz magnetochromism via electromagnons in the hexaferrite magnet Ba_{2}Mg_{2}Fe_{12}O_{22}

*Phys. Rev. B*83, 064422-1 - 064422-8 (28 February 2011) - * M. Uchida, Y. Onose, Y. Tokura

"Large magnetoresistance and spin-polarized heavy-mass electron state of the doped valence-bond

solid (Ti_{1-x}V_{x})_{2}O_{3}"

*Phys. Rev. B*83, 052404 (23 February 2011) - * Masao Nakamura, Yusuke Tokunaga, Masashi Kawasaki, and Yoshinori Tokura

"Multiferroicity in an orthorhombic YMnO_{3}single-crystal film"

*Appl. Phys. Lett.*98, 082902 (22 February 2011 :Online) - * F. Kagawa，Y. Onose, Y. Kaneko and Y. Tokura

"Relaxation dynamics of multiferroic domain walls in DyMnO3 with cycloidal spin order"

*Phys. Rev. B*83, 054413-1-10 (11 February 2011) - * Y. Kasahara, T. Nishijima, T. Sato, Y. Takeuchi, J. T. Ye, H. T. Yuan, H. Shimotani, and Y. Iwasa

"Electric-Field-Induced Superconductivity Detected by Magnetization Measurements of an Electric-Double-Layer Capacitor"

*J. Phys. Soc. Jpn.*80, 023708 (10 February 2011) - * I. Kezsmarki, N. Kida, H. Murakawa, S. Bordacs, Y. Onose, and Y. Tokura

"Enhanced Directional Dichroism of Terahertz Light in Resonance with Magnetic Excitations of the Multiferroic Ba2CoGe2O7 Oxide Compound"

*Phys. Rev. Lett.*106, 057403 (4 February 2011) - * Maxim Mostovoy, Kentaro Nomura, and Naoto Nagaosa

"Theory of Electric Polarization in Multiorbital Mott Insulators"

*Phys. Rev. Lett.*106, 047204 (27 January 2011) - * T. Suzuki, M. S. Bahramy, R. Arita, Y. Taguchi, and Y. Tokura

"Doping control and thermoelectric properties in R1-xAxZnSbO (R = La, Ce; A = Ca, Sr)"

Phys. Rev. B 83, 035204 (13 January 2011) - * M. Uchida, K. Ishizaka, P. Hansmann, Y. Kaneko, Y. Ishida, X. Yang, R. Kumai, A. Toschi, Y. Onose, R. Arita, K. Held, O. K. Andersen, S. Shin, Y. Tokura

"Pseudogap of metallic layered nickelate R2-xSrxNiO4 (R = Nd,Eu) crystals measured using angle-resolved photoemission spectroscopy"

*Phys. Rev. Lett.*106, 027001 (12 January 2011) - * H. T. Yuan, M. Toh, K. Morimoto, W. Tan, F. Wei, H. Shimotani, Ch. Kloc, and Y. Iwasa

"Liquid-gated electric-double-layer transistor on layered metal dichalcogenide, SnS_{2}"

Appl. Phys. Lett. 98, 012102 (4 January 2011) - * Y. Tokunaga, Y. Kaneko, D. Okuyama, S. Ishiwata, T. Arima, S. Wakimoto, K. Kakurai, Y. Taguchi, and Y. Tokura

"Multiferroic M-Type Hexaferrites with a Room-Temperature Conical State and Magnetically Controllable Spin Helicity"

Phys. Rev. Lett. 105, 257201 (13 December 2010) - *X. Z. Yu, N. Kanazawa, Y. Onose, K. Kimoto, W. Z. Zhang, S. Ishiwata, Y. Matsui & Y. Tokura

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

*Nature Materials*10, 106–109 (2011) *(published online: 05 December 2010) - * K. Shibuya, M. Kawasaki, Y. Tokura

"Metal-insulator transitions in TiO2/VO2 superlattices"

*Phys. Rev. B*82, 205118 (19 November 2010) - * H. Sakai, S. Ishiwata, D. Okuyama, A. Nakao, H. Nakao, Y. Murakami, Y. Taguchi, and Y. Tokura

"Electron doping in the cubic perovskite SrMnO3 : Isotropic metal versus chainlike ordering of Jahn-Teller polarons"

Phys. Rev. B 82, 180409(R) (17 November 2010) - * 野村健太郎

"トポロジカル絶縁体表面に現れるディラック電子"

固体物理 45, 743-751 (15 November 2010) - * B. Gu, I. Sugai, T. Ziman, G. Y. Guo, N. Nagaosa, T. Seki, K. Takanashi, and S. Maekawa

"Surface-Assisted Spin Hall Effect in Au Films with Pt Impurities"

*Phys. Rev. Lett.*105, 216401 (15 November 2010) - * M. Nakamura, A Sawa, J. Fujioka, M. Kawasaki, Y. Tokura

"Interface band profiles of Mott-insulator/Nb:SrTiO3 heterojunctions as investigated by optical spectroscopy"

*Phys. Rev. B*82, 201101 R (5 November 2010) - * Atsuo Shitade, Motohiko Ezawa, and Naoto Nagaosa

"Manipulation of two spin qubits in a double quantum dot using an electric field"

*Phys. Rev. B*82, 195305 (4 November 2010) - * Ryuichi Shindou, Akira Furusaki, and Naoto Nagaosa

"Quantum impurity spin in Majorana edge fermions"

Phys. Rev. B 82, 180505(R) (3 November 2010) - * J. Fujioka, Y. Ida, Y. Takahashi, N. Kida, R. Shimano, and Y. Tokura

"Optical investigation of the collective dynamics of charge-orbital density waves in layered manganites"

Phys. Rev. B 82, 140409(R) (19 October 2010) - * S. Asanuma, P.-H. Xiang, H. Yamada, H. Sato, I. H. Inoue, H. Akoh, A. Sawa, K. Ueno,

H. Shimotani, H. Yuan, M. Kawasaki, and Y. Iwasa

"Tuning of the metal-insulator transition in electrolyte-gated NdNiO3 thin films"

Appl. Phys. Lett. 97, 142110 (published online: 7 October 2010) - * Kentaro Nomura and Naoto Nagaosa

"Electric charging of magnetic textures on the surface of a topological insulator"

Phys. Rev. B 82, 161401 (1 October 2010) - * Masahito Mochizuki and Naoto Nagaosa

"Theoretically Predicted Picosecond Optical Switching of Spin Chirality in Multiferroics"

Phys. Rev. Lett. 105, 147202 (28 September 2010) - * H. Murakawa, Y. Onose, S. Miyahara, N. Furukawa, and Y. Tokura

"Ferroelectricity Induced by Spin-Dependent Metal-Ligand Hybridization in Ba2CoGe2O7"

Phys. Rev. Lett. 105, 137202 (20 September 2010) - * Y. Kohara, Y. Yamasaki, Y. Onose, and Y. Tokura

"Excess-electron induced polarization and magnetoelectric effect in yttrium iron garnet"

Phys. Rev. B 82, 104419 (17 September 2010) - * J. S. Lee, M. Nakamura, D. Okuyama, R. Kumai, T. Arima, M. Kawasaki, and Y. Tokura

"Competing electronic orders in anisotropically strained (Pr0.6Ca0.4)1−x(La0.6 Sr0.4)xMnO3 thin films"

Phys. Rev. B 82, 052406 (31 August 2010) - * S. Seki, T. Kurumaji, S. Ishiwata, H. Matsui, H. Murakawa, Y. Tokunaga, Y. Kaneko, T. Hasegawa, and Y. Tokura

"Cupric chloride CuCl2 as S=1/2 chain multiferroic"

Phys. Rev. B 82, 064424 (30 August 2010) - * S. Seki, N. Kida, S. Kumakura, R. Shimano, and Y. Tokura

"Electromagnons in the Spin Collinear State of a Triangular Lattice Antiferromagnet"

Phys. Rev. Lett. 105, 097207 (27 August 2010) - * Y. Krockenberger, M. Uchida, K. S. Takahashi, M. Nakamura, M. Kawasaki, and Y. Tokura

"Growth of superconducting Sr2RuO4 thin films"

Appl. Phys. Lett. 97, 082502 (published online: 26 August 2010) - * Bo Gu, Jing-Yu Gan, Nejat Bulut, Timothy Ziman, Guang-Yu Guo, Naoto Nagaosa,

and Sadamichi Maekawa

"Quantum Renormalization of the Spin Hall Effect"

Phys. Rev. Lett. 105, 086401 (18 August 2010) - * S. Johnston, F. Vernay, B. Moritz, Z.-X. Shen, N. Nagaosa, J. Zaanen, T. P. Devereaux

"Systematic study of electron-phonon coupling to oxygen modes across the cuprates"

Phys. Rev. B 82, 064513 (2010) - * Masahito Mochizuki, Nobuo Furukawa, and Naoto Nagaosa

"Spin Model of Magnetostrictions in Multiferroic Mn Perovskites"

Phys. Rev. Lett. 105, 037205 (16 July 2010) - * Y. Onose, T. Ideue, H. Katsura, Y. Shiomi, N. Nagaosa, Y. Tokura

"Observation of the Magnon Hall Effect"

Science 329, 297-299 (16 July 2010) - * Keji Lai, Masao Nakamura, Worasom Kundhikanjana, Masashi Kawasaki, Yoshinori Tokura,

Michael A. Kelly, Zhi-Xun Shen

"Mesoscopic Percolating Resistance Network in a Strained Manganite Thin Film"

Science 329, 190-193 (9 July 2010) - * Yoshihiro Iwasa

"Superconductivity: Revelations of the fullerenes"

Nature 466, 191–192 (08 July 2010) - * Jiadong Zang and Naoto Nagaosa

"Monopole current and unconventional Hall response on a topological insulator"

Phys. Rev. B 81, 245125 (25 June 2010) - * Aldin Radetinac, Kei S. Takahashi, Lambert Alff, Masashi Kawasaki, and Yoshinori Tokura

"Single-Crystalline CaMoO3 and SrMoO3 Films Grown by Pulsed Laser Deposition in a Reductive Atmosphere"

Appl. Phys. Express 3, 072003-1 - 072003-3 (18 June 2010) - * Takehito Yokoyama, Jiadong Zang, and Naoto Nagaosa

"Theoretical study of the dynamics of magnetization on the topological surface"

Phys. Rev. B 81, 241410(R) (18 June 2010) - * X. Z. Yu,Y. Onose,N. Kanazawa,J. H. Park,J. H. Han,Y. Matsui,N. Nagaosa, and Y. Tokura

"Real-space observation of a two-dimensional skyrmion crystal"

Nature 465, 901 - 904 (17 June 2010) - * F. Kagawa，S. Horiuchi，H. Matsui, R. Kumai, Y. Onose, T. Hasegawa, and Y. Tokura

"Electric-Field Control of Solitons in a Ferroelectric Organic Charge-Transfer Salt"

Phys. Rev. Lett. 104, 227602 (2010) - * Jacob Linder, Yukio Tanaka, Takehito Yokoyama, Asle Sudbø, and Naoto Nagaosa

"Interplay between superconductivity and ferromagnetism on a topological insulator"

Phys. Rev. B 81, 184525 (24 May 2010) - * Shintaro Ishiwata, Daisuke Okuyama, Kazuhisa Kakurai, Masakazu Nishi, Yasujiro Taguchi, and Yoshinori Tokura

"Neutron diffraction studies on the multiferroic conical magnet Ba2Mg2Fe12O22"

Phys. Rev. B 81, 174418 (2010) - * K. S. Takahashi, J. Fujioka, Y. Ida, M. Kawasaki, and Y. Tokura

"Control of orbital ordered state in strained Nd0.25Sr1.75MnO4 ﬁlms"

Appl. Phys. Lett. 96, 202508 (2010) - * Naoto Nagaosa, Jairo Sinova, Shigeki Onoda, A. H. MacDonald, N. P. Ong

"Anomalous Hall effect"

Rev. Mod. Phys. 82, 1539–1592 (2010) - * M. Mochizuki, N. Furukawa, and N. Nagaosa,

"Theory of Electromagnons in the Multiferroic Mn Perovskites: The Vital Role of Higher Harmonic Components of the Spiral Spin Order"

Phys. Rev. Lett.104, 177206 (2010)