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

All

FY 2010

FY 2011

FY 2012


Publications

  1. * S. Seki, X. Z. Yu, S. Ishiwata, Y. Tokura
    "Observation of Skyrmions in a Multiferroic Material"
    Science 336, no. 6078, pp. 198-201 ( 13 April 2012)
  2. * J. S. Lee, K. Shibuya, M. Kawasaki, and Y. Tokura
    "Optical investigation of metal-insulator transitions in V1−xWxO2 (0 ≤ x ≤ 0.33)"
    Phys. Rev. B 85, 155110 ( 06 April 2012)
  3. * P. D. C. King, R. H. He, T. Eknapakul, P. Buaphet, S.-K. Mo, Y. Kaneko, S. Harashima, Y. Hikita, M. S. Bahramy, C. Bell, Z. Hussain, Y. Tokura, Z.-X. Shen, H.Y. Hwang, F. Baumberger, and W. Meevasana
    "Subband Structure of a Two-Dimensional Electron Gas Formed at the Polar Surface of the Strong Spin-Orbit Perovskite KTaO3"
    Phys. Rev. Lett. 108, 117602 ( 16 March 2012)
  4. * N. Kanazawa, Y. Onose, Y. Shiomi, S. Ishiwata, and Y. Tokura
    "Band-filling dependence of thermoelectric properties in B20-type CoGe"
    Appl. Phys. Lett. 100, 093902 ( 02 March 2012)
  5. * Akira Tonomura, Xiuzhen Yu, Keiichi Yanagisawa, Tsuyoshi Matsuda, Yoshinori Onose, Naoya Kanazawa, Hyun Soon Park, and Yoshinori Tokura
    "Real-Space Observation of Skyrmion Lattice in Helimagnet MnSi Thin Samples"
    Nano Lett. 12, 1673–1677 ( 23 February 2012)
  6. * M. S. Bahramy, B.-J. Yang, R. Arita & N. Nagaosa
    "Emergence of non-centrosymmetric topological insulating phase in BiTeI under pressure"
    Nature Communications 3 Article number:679 ( 14 February 2012)
  7. * F. Mahfouzi, J. Fabian, N. Nagaosa and B. K. Nikolić
    "Charge pumping by magnetization dynamics in magnetic and semimagnetic tunnel junctions with interfacial Rashba or bulk extrinsic spin-orbit coupling"
    Phys. Rev. B 85, 054406 ( 06 February 2012)
  8. * Y. Kozuka, A. Tsukazaki, D. Maryenko, J. Falson, C. Bell, M. Kim, Y. Hikita, H. Y. Hwang, and M. Kawasaki
    "Single-valley quantum Hall ferromagnet in a dilute MgxZn1−xO/ZnO strongly correlated two-dimensional electron system"
    Phys. Rev. B 85, 075302 ( 03 February 2012)
  9. * N. Nagaosa and Y. Tokura
    "Emergent electromagnetism in solids"
    Phys. Scr. 146, 014020 ( 31 January 2012)
  10. * Y. Shiomi, M. Mochizuki, Y. Kaneko, and Y. Tokura
    "Hall Effect of Spin-Chirality Origin in a Triangular-Lattice Helimagnet Fe1.3Sb"
    Phys. Rev. Lett. 108, 056601 ( 30 January 2012)
  11. * H. Nakayama, J. T. Ye, T. Ohtani, Y. Fujikawa, K. Ando, Y. Iwasa, E. Saitoh
    "Electroresistance Effect in Gold Thin Film Induced by Ionic-Liquid-Gated Electric Double Layer"
    Appl. Phys. Ex. 5, 023002 ( 27 January 2012)
  12. * C. Rumble, M. Itou, N. Hiraoka, Y. Sakurai, Y. Tomioka, Y. Tokura, J. E. Penner-Hahn, and A. Deb
    "Imaging of 3d Mn orbitals in the ferromagnetic state for Ca-substituted manganite: Magnetic Compton investigation"
    Phys. Rev. B 85, 045128 ( 25 January 2012)
  13. * Yijin Zhang, Jianting Ye, Yusuke Matsuhashi, and Yoshihiro Iwasa
    "Ambipolar MoS2 Thin Flake Transistors"
    Nano Lett. 12 (3), 1136–1140 ( 25 January 2012)
  14. * H. Y. Hwang, Y. Iwasa, M. Kawasaki, B. Keimer, N. Nagaosa & Y. Tokura
    "Emergent phenomena at oxide interfaces"
    Nature Materials 11, 103–113 ( 24 January 2012)
  15. * J. Fujioka, M. Nakamura, M. Kawasaki, and Y. Tokura
    "Photocarrier collection from depletion layer of LaMnO3"
    J. Appl. Phys. 111, 016107 ( 13 January 2012)
  16. * Kentaro Nomura, Shinsei Ryu, Akira Furusaki, and Naoto Nagaosa
    "Cross-Correlated Responses of Topological Superconductors and Superfluids"
    Phys. Rev. Lett. 108, 026802 ( 12 January 2012)
  17. * Yuya Matsubara, Takayuki Makino, Hiroki Hiraga, Chunlin Chen, Susumu Tsukimoto, Kazunori Ueno,
    Yusuke Kozuka, Yuichi Ikuhara, and Masashi Kawasaki
    "High Crystallinity CuScO2 Delafossite Films Exhibiting Ultraviolet Photoluminescence Grown by Vapor–Liquid–Solid Tri-phase Epitaxy"
    Appl. Phys. Ex. 5, 011201 ( 11 January 2012)
  18. * 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
    "Emergent phenomena in perovskite-type manganites"
    Physica B 407, 1685–1688 ( 09 January 2012) *Proceeding
  19. * J. S. Lee, Y. Krockenberger, K. S. Takahashi, M. Kawasaki, and Y. Tokura
    "Insulator-metal transition driven by change of doping and spin-orbit interaction in Sr2IrO4"
    Phys. Rev. B 85, 035101 ( 04 January 2012)
  20. * Y. Tanaka, M. Sato and N.Nagaosa
    "Symmetry and Topology in Superconductors -Odd-Frequency Pairing and Edge States-"
    J. Phys. Soc. 81, 011013 ( 26 December 2011)
  21. * T. Suzuki, H. Sakai, Y. Taguchi, and Y. Tokura
    "Thermoelectric Properties of Electron-Doped SrMnO3 Single Crystals with Perovskite Structure"
    Journal of ELECTRONIC MATERIALS doi: 10.1007/s11664-011-1860-1 *Proceedings ( 22 December 2011)
  22. * V. Hutanu, A. Sazonov, H. Murakawa, Y. Tokura, B. Náfrádi, and D. Chernyshov
    "Symmetry and structure of multiferroic Ba2CoGe2O7"
    Phys. Rev. B 84, 212101 ( 19 December 2011)
  23. * M. Uchida, K. Ishizaka, P. Hansmann, X. Yang, M. Sakano, J. Miyawaki, R. Arita, Y. Kaneko,
    Y. Takata, M. Oura, A. Toschi, K. Held, A. Chainani, O. K. Andersen, S. Shin, and Y. Tokura
    "Orbital characters of three-dimensional Fermi surfaces in Eu2−xSrxNiO4 as probed by soft-x-ray angle-resolved photoemission spectroscopy"
    Phys. Rev. B 84, 241109 ( 19 December 2011)
  24. * Bohm-Jung Yang and Naoto Nagaosa
    "Skyrmion quantum numbers and quantized pumping in two-dimensional topological chiral magnets"
    Phys. Rev. B 84, 245123 ( 19 December 2011)
  25. * R. Kumai, S. Horiuchi, J. Fujioka, Y. Tokura
    "Ferroelectricity and Pressure-Induced Phenomena Driven by Neutral-Ionic Valence Instability of Acid-Base Supramolecules"
    Journal of the American Chemical Society 134, 1036–1046 ( 05 December 2011)
  26. * Youtarou Takahashi, Ryo Shimano, Yoshio Kaneko, Hiroshi Murakawa and Yoshinori Tokura
    "Magnetoelectric resonance with electromagnons in a perovskite helimagnet"
    Nature Physics DOI: 10.1038/NPHYS2161 ( 4 December 2011:Online)
  27. * S. Chakraverty, M. Saito, S. Tsukimoto, Y. Ikuhara, A. Ohtomo, and M. Kawasaki
    "Magnetic properties of Sr2FeTaO6 double perovskite epitaxially grown by pulsed-laser deposition"
    Appl. Phys. Lett. 99, 223101 ( 28 November 2011)
  28. * Ping-Hua Xiang, Shutaro Asanuma, Hiroyuki Yamada, Isao H. Inoue, Hiroshi Sato, Hiroshi Akoh, Akihito Sawa, Kazunori Ueno, Hongtao Yuan, Hidekazu Shimotani, Masashi Kawasaki, Yoshihiro Iwasa
    "Strain-Mediated Phase Control and Electrolyte-Gating of Electron-Doped Manganites"
    Adv. Mater. 23, 5822-5827 ( 22 November 2011)
  29. * S. Iguchi, Y. Kumano, K. Ueda, S. Kumakura, and Y. Tokura
    "Diffusive charge transport with strongly renormalized carrier mass in hole-doped Mott insulators (Y1−xCdx)2Mo2O7 with frustrated pyrochlore lattice"
    Phys. Rev. B 84, 174416 ( 14 November 2011)
  30. * M. Hudl, R. Mathieu, S. A. Ivanov, M. Weil, V. Carolus, Th. Lottermoser, M. Fiebig, Y. Tokunaga,Y. Taguchi, Y. Tokura, and P. Nordblad
    "Complex magnetism and magnetic-field-driven electrical polarization of Co3TeO6"
    Phys. Rev. B 84, 180404 (R) ( 8 November 2011)
  31. * S. Chakraverty, K. Yoshimatsu, Y. Kozuka, H. Kumigashira, M. Oshima, T. Makino, A. Ohtomo, and M. Kawasaki
    "Magnetic and electronic properties of ordered double-perovskite La2VMnO6 thin films"
    Phys. Rev. B 84, 132411 ( 19 October 2011)
  32. * K. Shibuya, D. Okuyama, R. Kumai, Y. Yamasaki, H. Nakao, Y. Murakami, Y. Taguchi, T. Arima, M. Kawasaki, and Y. Tokura
    "X-ray induced insulator-metal transition in a thin film of electron-doped VO2"
    Phys. Rev. B 84, 165108 ( 10 October 2011)
  33. * M. Mochizuki, N. Furukawa, and N. Nagaosa
    "Theory of spin-phonon coupling in multiferroic manganese perovskites RMnO3"
    Phys. Rev. B 84, 144409 ( 5 October 2011)
  34. * M. Mochizuki, and N. Nagaosa
    "Numerical Simulation of Spin-Chirality Switching in Multiferroics via Intense Electromagnon Excitations"
    Journal of Physics: Conference Series 320, 012082 ( 28 September 2011)
  35. * Jiadong Zang, Maxim Mostovoy, Jung Hoon Han, and Naoto Nagaosa
    "Dynamics of Skyrmion Crystals in Metallic Thin Films"
    Phys. Rev. Lett. 107, 136804 ( 23 September 2011)
  36. * H. Sakai, J. Fujioka, T. Fukuda, D. Okuyama, D. Hashizume, F. Kagawa, H. Nakao, Y. Murakami, T. Arima, A. Q. R. Baron, Y. Taguchi, and Y. Tokura
    "Displacement-Type Ferroelectricity with Off-Center Magnetic Ions in Perovskite Sr1-xBaxMnO3"
    Phys. Rev. Lett. 107, 137601 ( 16 September 2011)
  37. * 金澤直也、于秀珍、小野瀬佳文、松井良夫、永長直人、十倉好紀
    「ローレンツ顕微鏡によるスキルミオン格子の観察」
    日本結晶学会誌 53, No. 4, 274-279 ( 15 September 2011)
  38. * J. S. Lee, G. A. H. Schober, M. S. Bahramy, H. Murakawa, Y. Onose, R. Arita,
    N. Nagaosa, and Y. Tokura
    "Optical Response of Relativistic Electrons in the Polar BiTeI Semiconductor"
    Phys. Rev. Lett. 107, 117401 ( 9 September 2011)
  39. * Y. Tokunaga, D. Okuyama, T. Kurumaji, T. Arima, H. Nakao, Y. Murakami, Y. Taguchi,
    and Y. Tokura
    "Multiferroicity in NiBr2 with long-wavelength cycloidal spin structure on a triangular lattice"
    Phys. Rev. B 84, 060406 (R) ( 26 August 2011)
  40. * Joseph Falson, Denis Maryenko, Yusuke Kozuka, Atsushi Tsukazaki, and Masashi Kawasaki
    "Magnesium Doping Controlled Density and Mobility of Two-Dimensional Electron Gas in MgxZn1-xO/ZnO Heterostructures"
    Appl. Phys. Ex. 4, 091101 ( 17 August 2011)
  41. * 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
    "Magnetically driven ferroelectric atomic displacements in orthorhombic YMnO3"
    Phys. Rev. B 84, 054440 ( 11 August 2011)
  42. * Y. Shiomi, S. Ishiwata, Y. Taguchi, and Y. Tokura
    "Mott insulator to metal transition in filling-controlled SmMnAsO1−x"
    Phys. Rev. B 84, 054519 ( 10 August 2011)
  43. * S. Ishiwata, Y. Tokunaga, Y. Taguchi, and Y. Tokura
    "High-Pressure Hydrothermal Crystal Growth and Multiferroic Properties of a Perovskite YMnO3"
    J. Am. Chem. Soc. 135, 13818 ( 9 August 2011)
  44. * Y. Ishida, H. Kanto, A. Kikkawa, Y. Taguchi, Y. Ito, Y. Ota, K. Okazaki, W. Malaeb, M. Mulazzi, M. Okawa, S. Watanabe, C.-T. Chen, M. Kim, C. Bell, Y. Kozuka, H. Y. Hwang, Y. Tokura, S. Shin
    "Common Origin of the Circular-dichroism Pattern in ARPES of SrTiO3 and CuxBi2Se3"
    Phys. Rev. Lett. 107, 077601 ( 9 August 2011)
  45. * J. T. Ye, M.F. Craciun, M. Koshino, S. Russo, S. Inoue, H. T. Yuan, H. Shimotani, A. F. Morpurgo, Y. Iwasa
    "Accessing the transport properties of graphene and its multilayers at high carrier density"
    Proc. Nat. Acad. Sci. 108, 13002-13006 ( 9 August 2011)
  46. * S. Ishiwata, M. Tokunaga, Y. Kaneko, D. Okuyama, Y. Tokunaga, S. Wakimoto, K. Kakurai, T. Arima, Y. Taguchi, and Y. Tokura
    "Versatile helimagnetic phases under magnetic fields in cubic perovskite SrFeO3"
    Phys. Rev. B 84, 054427 ( 9 August 2011)
  47. * R. Iida, T. Satoh, T. Shimura, K. Kuroda, B. A. Ivanov, Y. Tokunaga, and Y. Tokura
    "Spectral dependence of photoinduced spin precession in DyFeO3"
    Phys. Rev. B 84, 064402 ( 2 August 2011)
  48. * Hiroki Hiraga, Takayuki Makino, Tomoteru Fukumura, Hongming Weng, and Masashi Kawasaki
    "Electronic structure of the delafossite-type CuMO2 (M = Sc, Cr, Mn, Fe, and Co): Optical absorption measurements and first-principles calculations"
    Phys. Rev. B 84, 041411 ( 29 July 2011)
  49. * H. T. Yuan, H. W. Liu, H. Shimotani, H. Guo, M. W. Chen, Q. K. Xue, Y. Iwasa
    "Liquid-Gated Ambipolar Transport in Ultrathin Films of a Topological Insulator Bi2Te3"
    Nano Letters 11, 2601-2605 (22 July 2011)
  50. * Y. Onose, R. Yoshimi, A. Tsukazaki, H. Yuan, T. Hidaka, Y. Iwasa, M. Kawasaki, Y. Tokura
    "Pulsed laser deposition and ionic liquid gate control ofepitaxial Bi2Se3 thin films"
    Appl. Phys. Ex. 4, 083001 ( 21 July 2011)
  51. * M. S. Bahramy, R. Arita, and N. Nagaosa,
    “Origin of giant bulk Rashba splitting: Application to BiTeI”
    Phys Rev. B., 84, 041202 ( 18 July 2011)
  52. * Alessandro Stroppa, Domenico Di Sante, Sachio Horiuchi, Yoshinori Tokura,
    David Vanderbilt, and Silvia Picozzi
    "Polar distortions in hydrogen-bonded organic ferroelectrics"
    Phys. Rev. B 84, 014101 ( 15 July 2011)
  53. * T. Nojima, H. Tada, S. Nakamura, N. Kobayashi, H. Shimotani, Y. Iwasa
    "Hole reduction and electron accumulation in YBa2Cu3Oy thin films using an electrochemical technique: Evidence for an n-type metallic state"
    Phys. Rev. B 84, 020502 (11 July 2011)
  54. * Y. Yamasaki, D. Okuyama, M. Nakamura, T. Arima, M. Kawasaki, Y. Tokura, T. Kimura, Y. Wakabayashi
    "Interfacial Structure of Manganite Superlattice"
    J. Phys. Soc. Jpn. 80, 073601(1)-(4) ( 27 June 2011)
  55. * K. Ishizaka, M. S. Bahramy, H. Murakawa, M. Sakano, T. Shimojima, T. Sonobe, K. Koizumi, S. Shin, H. Miyahara, A. Kimura, K. Miyamoto, T. Okuda, H. Namatame, M. Taniguchi, R. Arita, N. Nagaosa, K. Kobayashi, Y. Murakami, R. Kumai, Y. Kaneko, Y. Onose, and Y. Tokura
    "Giant Rashba-type spin splitting in bulk BiTeI"
    Nature Materials 10, 521–526 ( online: 19 June 2011)
  56. * Y. Krockenberger, J. S. Lee, D. Okuyama, H. Nakao, Y. Murakami, M. Kawasaki, and Y. Tokura "Garnet superlattice as a transparent above-room-temperature polar magnet"
    Phys. Rev. B 83 214414 ( 14 June 2011)
  57. * R. Shimano, Y. Ikebe, K. S. Takahashi, M. Kawasaki, N. Nagaosa and Y. Tokura
    "Terahertz Faraday rotation induced by an anomalous Hall effect in the itinerant ferromagnet SrRuO3"
    EPL 95, 17002 ( 14 June 2011)
  58. * T. Yokoyama, Y. Tanaka and N. Nagaosa
    "Anomalous Meissner Effect in a Normal-Metal–Superconductor Junction with a Spin-Active Interface"
    Phys. Rev. Lett. 106, 246601 ( 13 June 2011)
  59. * Youwen Long, Yoshio Kaneko, Shintaro Ishiwata, Yasujiro Taguchi and Yoshinori Tokura
    "Synthesis of cubic SrCoO3 single crystal and its anisotropic magnetic and transport properties"
    J. Phys.: Condens. Matter 23, 245601 (1 June 2011)
  60. * S. Z. Bisri, T. Takenobu, K. Sawabe, S. Tsuda, Y. Yomogida, T.Yamao, S. Hotta, C. Adachi, Y. Iwasa
    "p-i-n Homojunction in Organic Light-Emitting Transistors"
    Advanced Materials 23, 2753-2758 (24 May 2011)
  61. * S. Y. Zhou, Y. Zhu, M. C. Langner, Y.-D. Chuang, P. Yu, W. L. Yang, A. G. Cruz Gonzalez,
    N. Tahir, M. Rini, Y.-H. Chu, R. Ramesh, D.-H. Lee, Y. Tomioka, Y. Tokura, Z. Hussain, and R.W. Schoenlein
    "Ferromagnetic Enhancement of CE-Type Spin Ordering in (Pr, Ca)MnO3"
    Phys. Rev. Lett. 106, 186404 (6 May 2011)
  62. * M. Uchida, K. Oishi, M. Matsuo, W. Koshibae, Y. Onose, M. Mori, J. Fujioka, S. Miyasaka, S. Maekawa, and Y. Tokura
    "Thermoelectric response in the incoherent transport region near Mott transition: The case study of La1-xSrxVO3"
    Phys. Rev. B 83, 165127 (25 April 2011)
  63. * T. Kurumaji, S. Seki, S. Ishiwata, H. Murakawa, Y. Tokunaga, Y. Kaneko and Y. Tokura
    "Magnetic-Field Induced Competition of Two Multiferroic Orders in a Triangular-Lattice Helimagnet MnI2"
    Phys. Rev. Lett. 106, 167206 (22 April 2011)
  64. * Kentaro Nomura and Naoto Nagaosa
    "Surface-Quantized Anomalous Hall Current and the Magnetoelectric Effect in Magnetically Disordered Topological Insulators"
    Phys. Rev. Lett. 106, 166802 (18 April 2011)
  65. * N. Kanazawa, Y. Onose, T. Arima, D. Okuyama, K. Ohoyama, S. Wakimoto, K. Kakurai, S. Ishiwata, and Y. Tokura
    "Large Topological Hall Effect in a Short-Period Helimagnet MnGe"
    Phys. Rev. Lett. 106, 156603 (15 April 2011)
  66. * W. Koshibae, N. Furukawa, and N. Nagaosa
    "Photo-induced insulator-metal transition of a spin-electron coupled system"
    EPL 94, 27003 (13 April 2011)
  67. * B. Gu, T. Ziman, GY. Guo, N. Nagaosa and S. Maekawa
    "Giant spin Hall effect of Au films with Pt impurities: Surface-assisted skew scattering"
    J. Appl. Phys 109, 07C502 ( 17 March 2011 : online)
  68. * A. Radetinac, K.S. Takahashi, L. Alff, M. Kawasaki, and Y. Tokura
    "Single-crystalline Sr2MoO4 films as prepared by pulsed laser deposition"
    Journal of Crystal Growth 322, 38-40 (online: 12 March 2011)