Emergent electromagnetism in magnets

2016 Fiscal Year Annual Research Report

• Project/Area Number: 24224009
• Research Institution: The University of Tokyo
• Principal Investigator: 永長 直人 東京大学, 大学院工学系研究科(工学部), 教授 (60164406)
• Co-Investigator(Kenkyū-buntansha): 十倉 好紀 東京大学, 大学院工学系研究科(工学部), 教授 (30143382) ; 佐藤 卓 東北大学, 多元物質科学研究所, 教授 (70354214) ; BAHRAMY MOHAMMAD 東京大学, 大学院工学系研究科(工学部), 特任講師 (10587463)
• Project Period (FY): 2012-05-31 – 2017-03-31
• Keywords: トポロジカル絶縁体 / ワイル半金属 / スキルミオン / モノポール / ラシュバ相互作用

Outline of Annual Research Achievements

実空間と運動量空間のトポロジカル磁性体を制御し、様々な動的現象の理論解析と実験的観測に成功した。スキルミオン系においては、2層系におけるダイナミクスの数値シミュレーションを行い、その特異な振る舞いを明らかにするとともに、実験的には過冷却による三角/四角格子間の結晶制御、創発モノポール結晶のダイナミクスの観測、スキルミオン形成の電場制御などに成功した。また、MnSiの電流下中性子小角散乱実験を米国標準技術研究所中性子センターにて実施し、十分に制御された温度勾配下で電流によるスキルミオン格子変形を確認した。また、反強磁性スキルミオン物質と期待されるCaBaCo2Fe2O7の磁場中中性子散乱実験を行い、一様磁化方向と格子非整合磁気ピークの関連を明らかにした。また、マグノンに対するラシュバ分裂効果を、反転対称をもたないMnSiやa-Cu2V2O7にて実験的に検出した。一方の運動量空間におけるモノポールとして振る舞うバンド交差によるスピンダイナミクスの異常を、SrRuO3において観測することに成功し、ホール伝導度との関連を理論的に基礎づけた。また、カイラル量子異常によって起きるワイル半金属における非相反電流特性を理論的に予言した。その他にもイリジウム酸化物においてもワイル点が多数現れる様々なトポロジカル電子相とそれに起因した異常な電気伝導物性を観測するとともに平均場近似によって相図を構成し、実験と良い対応を得た。マルチフェロイクス物質群では種々のエレクトロマグノン共鳴と光の方向二色性を示した。磁性トポロジカル絶縁体においては、積層構造デバイスでのアクシオン状態の発見に加え、スピン偏極した表面状態に由来する電流の方向二色性、光電流発生、磁気光学効果などの動的物性を観測した。多岐に渡る動的現象の解析と観測を通して、トポロジカル磁性との深い関連を明らかにし、学理構築に寄与できた。

Research Progress Status

28年度が最終年度であるため、記入しない。

Strategy for Future Research Activity

28年度が最終年度であるため、記入しない。

Research Products

• [Int'l Joint Research] ANSTO(オーストラリア)
  • Country Name: AUSTRALIA
  • Counterpart Institution: ANSTO
• [Int'l Joint Research] Oak Ridge National Laboratory/NIST(米国)
  • Country Name: U.S.A.
  • Counterpart Institution: Oak Ridge National Laboratory/NIST
• [Int'l Joint Research] Technische Universitat Munchen/Forschungszentrum Julich(ドイツ)
  • Country Name: GERMANY
  • Counterpart Institution: Technische Universitat Munchen/Forschungszentrum Julich
• [Int'l Joint Research] Paul Scherrer Institut (PSI)/EPFL(スイス)
  • Country Name: SWITZERLAND
  • Counterpart Institution: Paul Scherrer Institut (PSI)/EPFL
• [Int'l Joint Research] Mahidol University(タイ)
  • Country Name: THAILAND
  • Counterpart Institution: Mahidol University
• [Int'l Joint Research]
  • # of Other Countries: 2
• [Journal Article] Concept of Quantum Geometry in Optoelectronic Processes in Solids: Application to Solar Cells (2017)
  • Author(s): Naoto Nagaosa and Takahiro Morimoto
  • Journal Title: Advanced Materials Volume: online Pages: 1603345-1-13
  • DOI: 10.1002/adma.201603345
  • Peer Reviewed / Open Access / Acknowledgement Compliant
• [Journal Article] Bulk rectification effect in a polar semiconductor (2017)
  • Author(s): T. Ideue, K. Hamamoto, S. Koshikawa, M. Ezawa, S. Shimizu, Y. Kaneko, Y. Tokura, N. Nagaosa and Y. Iwasa
  • Journal Title: Nature Communications Volume: online Pages: 1-7
  • DOI: 10.1038/nphys4056
  • Peer Reviewed / Open Access / Acknowledgement Compliant
• [Journal Article] Bulk Rashba semiconductors and related quantum phenomena (2017)
  • Author(s): M. S. Bahramy and N. Ogawa
  • Journal Title: Advanced Materials Volume: Online Pages: 1605911-1-15
  • DOI: 10.1002/Adam.201605911
  • Peer Reviewed / Open Access / Acknowledgement Compliant
• [Journal Article] Observation of anomalous Hall effect in a non-magnetic two-dimensional electron system (2017)
  • Author(s): D. Maryenko, A. S. Mishchenko, M. S. Bahramy, A. Ernst, J. Falson, Y. Kozuka, A. Tsukazaki, N. Nagaosa and M. Kawasaki
  • Journal Title: Nature Communications Volume: 8 Pages: 14777-1-8
  • DOI: 10.1038/ncomms14777
  • Peer Reviewed / Open Access / Acknowledgement Compliant
• [Journal Article] Noncentrosymmetric Magnets Hosting Magnetic Skyrmions (2017)
  • Author(s): Naoya Kanazawa, Shinichiro Seki, Yoshinori Tokura
  • Journal Title: Advanced Materials Volume: Online Pages: 1603227-1-19
  • DOI: 10.1002/adma.201603227
  • Peer Reviewed / Open Access / Acknowledgement Compliant
• [Journal Article] Correlated Dirac semimetallic state with unusual positive magnetoresistance in strain-free perovskite SrIrO3 (2017)
  • Author(s): J. Fujioka, T. Okawa, A. Yamamoto, and Y. Tokura
  • Journal Title: Physical Review B Volume: 95 Pages: 121102-1-5
  • DOI: 10.1103/PhysRevB.95.121102
  • Peer Reviewed / Acknowledgement Compliant
• [Journal Article] A magnetic heterostructure of topological insulators as a candidate for an axion insulator (2017)
  • Author(s): M. Mogi, M. Kawamura, R. Yoshimi, A. Tsukazaki, Y. Kozuka, N. Shirakawa, K. S. Takahashi, M. Kawasaki, and Y. Tokura
  • Journal Title: Nature Materials Volume: Online Pages: 516-521
  • DOI: 10.1038/nmat4855
  • Peer Reviewed / Acknowledgement Compliant
• [Journal Article] Theory of skyrmions in bilayer systems (2017)
  • Author(s): W. Koshibae and N. Nagaosa
  • Journal Title: Scientific Reports Volume: 7 Pages: 42645-1-10
  • DOI: 10.1038/srep42645
  • Peer Reviewed / Open Access / Acknowledgement Compliant
• [Journal Article] Temperature and Magnetic Field Dependence of the Internal and Lattice Structures of Skyrmions by Off-Axis Electron Holography (2017)
  • Author(s): K. Shibata, A. Kovacs, N.S. Kiselev, N. Kanazawa, R.E. Dunin-Borkowski, and Y. Tokura
  • Journal Title: Physical Review Letters Volume: 118 Pages: 087202-1-5
  • DOI: 10.1103/PhysRevLett.118.087202
  • Peer Reviewed / Int'l Joint Research / Acknowledgement Compliant
• [Journal Article] Deformation of Topologically-Protected Supercooled Skyrmions in a Thin Plate of Chiral Magnet Co8Zn8Mn4 (2017)
  • Author(s): D. Morikawa, X-Z Yu, K. Karube, Y. Tokunaga, Y. Taguchi, T. Arima, and Y. Tokura
  • Journal Title: Nano Letters Volume: 17 Pages: 1637-1641
  • DOI: 10.1021/acs.nanolett.6b04821
  • Peer Reviewed / Acknowledgement Compliant
• [Journal Article] Electromagnon resonance in a collinear spin state of the polar antiferromagnet Fe2Mo3O8 (2017)
  • Author(s): T. Kurumaji, Y. Takahashi, J. Fujioka, R. Masuda, H. Shishikura, S. Ishiwata, and Y. Tokura
  • Journal Title: Physical Review B Volume: 95 Pages: 020405(R)-1-5
  • DOI: 10.1103/PhysRevB.95.020405
  • Peer Reviewed / Acknowledgement Compliant
• [Journal Article] Theory of photoinduced FloquetWeyl semimetal phases (2016)
  • Author(s): Xiao-Xiao Zhang, Tze Tzen Ong and Naoto Nagaosa
  • Journal Title: Physical Review B Volume: 94 Pages: 235137-1-13
  • DOI: 10.1103/PhysRevB.94.235137
  • Peer Reviewed / Acknowledgement Compliant
• [Journal Article] Emergent Electromagnetic Induction and Adiabatic Charge Pumping in Noncentrosymmetric Weyl Semimetals (2016)
  • Author(s): H. Ishizuka, T. Hayata, M. Ueda and N. Nagaosa
  • Journal Title: Phys. Rev. Lett. Volume: 117 Pages: 216601-1-5
  • DOI: 10.1103/PhysRevLett.117.216601
  • Peer Reviewed / Acknowledgement Compliant
• [Journal Article] Berry Curvature in Magnon-Phonon Hybrid Systems (2016)
  • Author(s): R. Takahashi and N. Nagaosa
  • Journal Title: Phys. Rev. Lett. Volume: 117 Pages: 217205-1-5
  • DOI: 10.1103/PhysRevLett.117.217205
  • Peer Reviewed / Acknowledgement Compliant
• [Journal Article] Tiny adiabatic-demagnetization refrigerator for a commercial superconducting quantum interference device magnetometer (2016)
  • Author(s): Taku J. Sato, Daisuke Okuyama, and Hideo Kimura
  • Journal Title: Rev. Sci. Instrum. Volume: 87 Pages: 123905-1-7
  • DOI: 10.1063/1.4972249
  • Peer Reviewed / Acknowledgement Compliant
• [Journal Article] Contrasting Magnetic Behaviors in Rhodium- and Ruthenium-Doped Cubic Perovskite SrFeO3: Nearly Ferro- magnetic Metal versus Spin-Glass Insulator (2016)
  • Author(s): M. Kinoshita, H. Sakai, N. Hayashi, Y. Tokura, M. Takano, and S. Ishiwata
  • Journal Title: Angewandte Chemie-International Edition Volume: 55 Pages: 15292-15296
  • DOI: 10.1002/anie.201608222
  • Peer Reviewed / Acknowledgement Compliant
• [Journal Article] Direct observation of anisotropic magnetic field response of the spin helix in FeGe thin films (2016)
  • Author(s): N. Kanazawa, J. S. White, H. M. Ronnow, C. D. Dewhurst, Y. Fujishiro, A. Tsukazaki, Y. Kozuka, M. Kawasaki, M. Ichikawa, F. Kagawa, and Y. Tokura
  • Journal Title: Physical Review B Volume: 94 Pages: 184432-1-7
  • DOI: 10.1103/PhysRevB.94.184432
  • Peer Reviewed / Int'l Joint Research / Acknowledgement Compliant
• [Journal Article] Electric transport in three-dimensional skyrmion/monopole crystal (2016)
  • Author(s): Xiao-Xiao Zhang, Andrey S. Mishchenko, Giulio De Filippis, and Naoto Nagaosa
  • Journal Title: Physical Review B Volume: 94 Pages: 174428-1-16
  • DOI: 10.1103/PhysRevB.94.174428
  • Peer Reviewed / Int'l Joint Research / Acknowledgement Compliant
• [Journal Article] Magnetic structures and excitations in a multiferroic Y-type hexaferrite BaSrCo2Fe11AlO22 (2016)
  • Author(s): T. Nakajima, Y. Tokunaga, M. Matsuda, S. Dissanayake, J. Fernandez-Baca, K. Kakurai, Y. Taguchi, Y. Tokura, and T. Arima
  • Journal Title: Physical Review B Volume: 94 Pages: 195154-1-11
  • DOI: 10.1103/PhysRevB.94.195154
  • Peer Reviewed / Int'l Joint Research / Acknowledgement Compliant
• [Journal Article] Aging, memory, and nonhierarchical energy landscape of spin jam (2016)
  • Author(s): Anjana Samarakoona, Taku J. Sato, Tianran Chen, Gai-Wei Chern, Junjie Yang, Israel Klich, Ryan Sinclair, Haidong Zhou, and Seung-Hun Lee
  • Journal Title: Proc. Natl. Acad. Sci. USA Volume: 113 Pages: 11806-11810
  • DOI: 10.1073/pnas.1608057113
  • Peer Reviewed / Int'l Joint Research / Acknowledgement Compliant
• [Journal Article] Magnon dispersion shift in the induced ferromagnetic phase of noncentrosymmetric MnSi (2016)
  • Author(s): Taku J. Sato, Daisuke Okuyama, Tao Hong, Akiko Kikkawa, Yasujiro Taguchi,Taka-hisa Arima, and Yoshinori Tokura
  • Journal Title: Phys. Rev. B Volume: 94 Pages: 144420-1-7
  • DOI: 10.1103/PhysRevB.94.144420
  • Peer Reviewed / Int'l Joint Research / Acknowledgement Compliant
• [Journal Article] Coulomb and electron-phonon interactions in metals (2016)
  • Author(s): Igor S. Tupitsyn, Andrey S. Mishchenko, Naoto Nagaosa, and Nikolay Prokof'ev
  • Journal Title: Phys. Rev. B Volume: 94 Pages: 155145-1-5
  • DOI: 10.1103/PhysRevB.94.155145
  • Peer Reviewed / Int'l Joint Research / Acknowledgement Compliant
• [Journal Article] Relation between the structural phase transition and superconductivity in CuxIrTe2-ySey (2016)
  • Author(s): M. Kamitani, H. Sakai, Y. Tokura, and S. Ishiwata
  • Journal Title: Physical Review B Volume: 94 Pages: 134507-1-6
  • DOI: 10.1103/PhysRevB.94.134507
  • Peer Reviewed / Acknowledgement Compliant
• [Journal Article] Robust metastable skyrmions and their triangular-square lattice structural transition in a high-temperature chiral magnet (2016)
  • Author(s): K. Karube, J. S. White, N. Reynolds, J. L. Gavilano, H. Oike, A. Kikkawa, F. Kagawa, Y. Tokunaga, H. M. Ronnow, Y. Tokura, and Y. Taguchi
  • Journal Title: Nature Materials Volume: 15 Pages: 1237-1242
  • DOI: 10.1038/nmat4752
  • Peer Reviewed / Int'l Joint Research / Acknowledgement Compliant
• [Journal Article] Transition to and from the skyrmion lattice phase by electric fields in a magnetoelectric compound (2016)
  • Author(s): Y. Okamura, F. Kagawa, S. Seki, and Y. Tokura
  • Journal Title: Nature Communications Volume: 7 Pages: 12669-1-6
  • DOI: 10.1038/ncomms12669
  • Peer Reviewed / Open Access / Acknowledgement Compliant
• [Journal Article] Observation of nonreciprocal directional dichroism via electromagnon resonance in a chiral-lattice helimagnet Ba3NbFe3Si2O14 (2016)
  • Author(s): H. Narita, Y. Tokunaga, A. Kikkawa, Y. Taguchi, Y. Tokura, and Y. Takahashi
  • Journal Title: Physical Review B Volume: 94 Pages: 094433-1-7
  • DOI: 10.1103/PhysRevB.94.094433
  • Peer Reviewed / Acknowledgement Compliant
• [Journal Article] Chiral Anomaly and Giant Magnetochiral Anisotropy in Noncentrosymmetric Weyl Semimetals (2016)
  • Author(s): T. Morimoto and N. Nagaosa
  • Journal Title: Physical Review Letters Volume: 117 Pages: 146603-1-5
  • DOI: 10.1103/PhysRevLett.117.146603
  • Peer Reviewed / Acknowledgement Compliant
• [Journal Article] Green's function of the magnetic topological insulator in a gradient expansion approach (2016)
  • Author(s): Y. Hama and N. Nagaosa
  • Journal Title: Progress of Theoretical and Experimental Physics Volume: 9 Pages: 093I01-1-9
  • DOI: 10.1093/ptep/ptw117
  • Peer Reviewed / Acknowledgement Compliant
• [Journal Article] Large Unidirectional Magnetoresistance in a Magnetic Topological Insulator (2016)
  • Author(s): K. Yasuda, A. Tsukazaki, R. Yoshimi, K.S. Takahashi, M. Kawasaki, and Y. Tokura
  • Journal Title: Physical Review Letters Volume: 117 Pages: 127202-1-5
  • DOI: 10.1103/PhysRevLett.117.127202
  • Peer Reviewed / Acknowledgement Compliant
• [Journal Article] Local dynamics of topological magnetic defects in the itinerant helimagnet FeGe (2016)
  • Author(s): A. Dussaux, P. Schoenherr, K. Koumpouras, J. Chico, K. Chang, L. Lorenzelli, N. Kanazawa, Y. Tokura, M. Garst, A. Bergman, C. L. Degen, and D. Meier
  • Journal Title: Nature Communications Volume: 7 Pages: 12430-1-9
  • DOI: 10.1038/ncomms12430
  • Peer Reviewed / Open Access / Int'l Joint Research / Acknowledgement Compliant
• [Journal Article] Photocreating supercooled spiral-spin states in a multiferroic manganite (2016)
  • Author(s): Y. M. Sheu, N. Ogawa, Y. Kaneko, and Y. Tokura
  • Journal Title: Physical Review B Volume: 94 Pages: 081107-1-5
  • DOI: 10.1103/PhysRevB.94.081107
  • Peer Reviewed / Acknowledgement Compliant
• [Journal Article] Magnetic Reversal of Electric Polarization with Fixed Chirality of Magnetic Structure in a Chiral-Lattice Helimagnet MnSb2O6 (2016)
  • Author(s): M. Kinoshita, S. Seki, T. J. Sato, Y. Nambu, T. Hong, M. Matsuda, H. B. Cao, S.Ishiwata, and Y. Tokura
  • Journal Title: Phys. Rev. Lett. Volume: 117 Pages: 047201-1-5
  • DOI: 10.1103/PhysRevLett.117.047201
  • Peer Reviewed / Int'l Joint Research / Acknowledgement Compliant
• [Journal Article] Spin-valley locking in the normal state of a transition-metal dichalcogenide superconductor (2016)
  • Author(s): L. Bawden, S. P. Cooil, F. Mazzola, J. M. Riley, L. J. Collins-McIntyre, V. Sunko, K. W. B. Hunvik, M. Leandersson, C. M. Polley, T. Balasubramanian, T. K. Kim, M. Hoesch, J. W. Wells, G. Balakrishnan, M. S. Bahramy, P. D. C. King
  • Journal Title: Nature Communications Volume: 7 Pages: 11711
  • DOI: 10.1038/ncomms11711
  • Peer Reviewed / Open Access / Int'l Joint Research / Acknowledgement Compliant
• [Journal Article] Topological aspects of nonlinear excitonic processes in noncentrosymmetric crystals (2016)
  • Author(s): T. Morimoto and N. Nagaosa
  • Journal Title: Physical Review B Volume: 94 Pages: 035117-1-8
  • DOI: 10.1103/PhysRevB.94.035117
  • Peer Reviewed / Acknowledgement Compliant
• [Journal Article] Zero-bias photocurrent in ferromagnetic topological insulator (2016)
  • Author(s): N. Ogawa, R. Yoshimi, K. Yasuda, A. Tsukazaki, M. Kawasaki, and Y. Tokura
  • Journal Title: Nature Communications Volume: 7 Pages: 12246-1-6
  • DOI: 10.1038/ncomms12246
  • Peer Reviewed / Open Access / Acknowledgement Compliant
• [Journal Article] Terahertz spectroscopy on Faraday and Kerr rotations in a quantum anomalous Hall state (2016)
  • Author(s): K. N. Okada, Y. Takahashi, M. Mogi, R. Yoshimi, A. Tsukazaki, K. S. Takahashi, N. Ogawa, M. Kawasaki, and Y. Tokura
  • Journal Title: Nature Communications Volume: 7 Pages: 12245-1-6
  • DOI: 10.1038/ncomms12245
  • Peer Reviewed / Open Access / Acknowledgement Compliant
• [Journal Article] Incommensurate Magnetic Structure in the Cubic Noncentrosymmetric Ternary Compound Pr5Ru3Al2 (2016)
  • Author(s): Koya Makino, Daisuke Okuyama, Maxim Avdeev, and Taku J. Sato
  • Journal Title: J. Phys Soc Jpn Volume: 85 Pages: 073705-1-5
  • DOI: 10.7566/JPSJ.85.073705
  • Peer Reviewed / Int'l Joint Research / Acknowledgement Compliant
• [Journal Article] Weyl fermions and spin dynamics of metallic ferromagnet SrRuO3 (2016)
  • Author(s): S. Itoh, Y. Endoh, T. Yokoo, S. Ibuka, J.-G. Park, Y. Kaneko, K. S. Takahashi, Y. Tokura, and N. Nagaosa
  • Journal Title: Nature Communications Volume: 7 Pages: 11788-1-8
  • DOI: 10.1038/ncomms11788
  • Peer Reviewed / Open Access / Int'l Joint Research / Acknowledgement Compliant
• [Journal Article] Variation of optical conductivity spectra in the course of bandwidth-controlled metal-insulator transitions in pyrochlore iridates (2016)
  • Author(s): K. Ueda, J. Fujioka, and Y. Tokura
  • Journal Title: Physical Review B Volume: 93 Pages: 245120-1-10
  • DOI: 10.1103/PhysRevB.93.245120
  • Peer Reviewed / Acknowledgement Compliant
• [Journal Article] Versatile optical magnetoelectric effects by electromagnons in MnWO4 with canted spin-spiral plane (2016)
  • Author(s): Y. Takahashi, S. Kibayashi, Y. Kaneko, and Y. Tokura
  • Journal Title: Physical Review B Volume: 93 Pages: 180404(R)-1-5
  • DOI: 10.1103/PhysRevB.93.180404
  • Peer Reviewed / Acknowledgement Compliant
• [Journal Article] Critical phenomena of emergent magnetic monopoles in a chiral magnet (2016)
  • Author(s): N. Kanazawa, Y. Nii, X. -X. Zhang, A. S. Mishchenko, G. De Filippis, F. Kagawa, Y. Iwasa, N. Nagaosa, and Y. Tokura
  • Journal Title: Nature Communications Volume: 7 Pages: 11622-1-7
  • DOI: 10.1038/ncomms11622
  • Peer Reviewed / Open Access / Int'l Joint Research / Acknowledgement Compliant
• [Journal Article] Variation of spin-orbit coupling and related prop- erties in skyrmionic system Mn1-xFexGe (2016)
  • Author(s): N. Kanazawa, K. Shibata and Y. Tokura
  • Journal Title: New Journal of Physics Volume: 18 Pages: 045006-1-6
  • DOI: 10.1088/1367-2630/18/4/045006
  • Peer Reviewed / Open Access / Acknowledgement Compliant
• [Journal Article] Enhanced thermopower in ZnO two-dimensional electron gas (2016)
  • Author(s): S. Shimizu, M. S. Bahramy, T. Iizuka, S. Ono, K. Miwa, Y. Tokura, and Y. Iwasa
  • Journal Title: PNAS Volume: 113 Pages: 6438-6443
  • DOI: 10.1073/pnas.1525500113
  • Peer Reviewed / Acknowledgement Compliant
• [Journal Article] Heat-Treatment-Induced Switching of Magnetic States in the Doped Polar Semiconductor Ge1-xMnxTe (2016)
  • Author(s): M. Kriener, T. Nakajima, Y. Kaneko, A. Kikkawa, X. Z. Yu, N. Endo, K. Kato, M. Takata, T. Arima, Y. Tokura and Y. Taguchi
  • Journal Title: Scienetific Reports Volume: 6 Pages: 25748-1-9
  • DOI: 10.1038/srep25748
  • Peer Reviewed / Open Access / Acknowledgement Compliant
• [Journal Article] Thermally activated helicity reversals of skyrmions (2016)
  • Author(s): X. Z. Yu, K. Shibata, W. Koshibae, Y. Tokunaga, Y. Kaneko, T. Nagai, K. Kimoto, Y. Taguchi, N. Nagaosa, and Y. Tokura
  • Journal Title: Phys. Rev. B Volume: 93 Pages: 134417-1-9
  • DOI: 0.1103/PhysRevB.93.134417
  • Peer Reviewed
• [Journal Article] Berry curvature and dynamics of a magnetic bubble (2016)
  • Author(s): W. Koshibae and N. Nagaosa
  • Journal Title: New Journal of Physics Volume: 18 Pages: 045007-1-8
  • DOI: 10.1088/1367-2630/18/4/045007
  • Peer Reviewed / Open Access / Acknowledgement Compliant
• [Presentation] 中性子非弾性散乱と物質科学研究の新展開 (2017)
  • Author(s): 佐藤卓
  • Organizer: 日本物理学会第72回年次大会（シンポジウム講演）
  • Place of Presentation: 大阪大学豊中キャンパス、豊中市、大阪
  • Year and Date: 2017-03-17 – 2017-03-20
• [Presentation] MnSiにおける電流中中性子小角散乱 (2017)
  • Author(s): 奥山大輔, J. S. White, M. Bartkowiak, G. Nagy, I. Z. Quan, I. Zivkovic, H. M. Ronnow, Q. Ye, P. Butler, 岩崎惇一, 永長直人, 吉川明子, 田口康二郎, 十倉好紀, 東大樹, 南部雄亮, 佐藤卓
  • Organizer: 日本物理学会第72回年次大会
  • Place of Presentation: 大阪大学豊中キャンパス、豊中市、大阪
  • Year and Date: 2017-03-17 – 2017-03-20
• [Presentation] Magnetoelectric responses from topological magnets (2017)
  • Author(s): Yoshinori Tokura
  • Organizer: TPFC2017
  • Place of Presentation: ISSP, Kashiwa, Chiba, Japan
  • Year and Date: 2017-02-20 – 2017-02-22
  • Int'l Joint Research / Invited
• [Presentation] Nonlinear and nonreciprocal responses of topological matters (2017)
  • Author(s): N. Nagaosa
  • Organizer: TPFC2017
  • Place of Presentation: ISSP, Kashiwa, Chiba, Japan
  • Year and Date: 2017-02-20 – 2017-02-22
  • Int'l Joint Research / Invited
• [Presentation] Correlated Weyl semimetal states in iridium oxides (2017)
  • Author(s): Yoshinori Tokura
  • Organizer: The CEMS-QPEC Symposium on “Emergent Quantum Materials”
  • Place of Presentation: University of Tokyo, Bunkyo-ku, Tokyo, Japan
  • Year and Date: 2017-01-17
  • Int'l Joint Research
• [Presentation] Magnetoelectric responses from topological magnets (2017)
  • Author(s): Yoshinori Tokura
  • Organizer: The DMREF-FCMP Symposium on Mott Transitions and Computational Approaches
  • Place of Presentation: University of Tokyo, Bunkyo-ku, Tokyo, Japan
  • Year and Date: 2017-01-17
  • Int'l Joint Research / Invited
• [Presentation] Emergent Topological Particles in Magnets (2017)
  • Author(s): Yoshinori Tokura
  • Organizer: Special Forum on “Quantum Hall Effect, Topological Matter and High-Temperature Superconductivity”
  • Place of Presentation: Beijin, China
  • Year and Date: 2017-01-14
  • Int'l Joint Research / Invited
• [Presentation] 磁性とトポロジー (2016)
  • Author(s): 十倉 好紀
  • Organizer: 科学技術未来戦略ワークショップ「トポロジカル量子戦略～量子力学の新展開がもたらすデバイスイノベーション～」
  • Place of Presentation: 国立研究開発法人科学技術振興機構、千代田区、東京
  • Year and Date: 2016-12-19
  • Invited
• [Presentation] Experimental Overview on Weyl Semimetals (2016)
  • Author(s): Yoshinori Tokura
  • Organizer: Chiral Matter from quarks to Dirac semimetals
  • Place of Presentation: RIKEN Okochi-Hall, Wakoshi, Saitama, Japan
  • Year and Date: 2016-12-08
  • Int'l Joint Research
• [Presentation] Robust Metastable Skyrmions in Chiral Magnets (2016)
  • Author(s): Yoshinori Tokura
  • Organizer: 2016 MRS Fall Meeting
  • Place of Presentation: Boston, MA, USA
  • Year and Date: 2016-11-27 – 2016-12-02
  • Int'l Joint Research / Invited
• [Presentation] トポロジーと機能 (2016)
  • Author(s): 十倉好紀
  • Organizer: 産総研-理研 第2回量子技術イノベーションコアワークショップ
  • Place of Presentation: 富士ソフトアキバプラザ、千代田区、東京
  • Year and Date: 2016-11-22
• [Presentation] 磁気スキルミオンおよび創発モノポールの結晶格子相転移と巨大電磁気応答 (2016)
  • Author(s): 十倉好紀
  • Organizer: 第4回豊田理研ワークショップ "キラル対称性の電磁応答"
  • Place of Presentation: トヨタ産業技術記念館、名古屋市、愛知
  • Year and Date: 2016-11-18 – 2016-11-20
  • Invited
• [Presentation] カイラル磁性体中の非対称な強磁性マグノン分散 (2016)
  • Author(s): 佐藤卓
  • Organizer: アライアンス 「エレクトロニクス 物質・デバイスグループ（G1）」分科会
  • Place of Presentation: かんぽの宿 柳川、柳川市、福岡
  • Year and Date: 2016-11-18 – 2016-11-19
• [Presentation] Ubiquitous Dirac points mediated by crystal field in transition metal dichalcogenides (2016)
  • Author(s): M. S. Bahramy
  • Organizer: International Symposium on Revolutionary Atomic-Layer Materials
  • Place of Presentation: Tohoku University, Sendai, Miyagi
  • Year and Date: 2016-10-21 – 2016-10-22
  • Int'l Joint Research / Invited
• [Presentation] Magnetoelectric responses from topological magnets (2016)
  • Author(s): Yoshinori Tokura
  • Organizer: RIKEN-Tsinghua Joint Workshop
  • Place of Presentation: Beijin, China
  • Year and Date: 2016-10-18 – 2016-10-18
  • Int'l Joint Research
• [Presentation] Meta-stable skyrmions in chiral magnets (2016)
  • Author(s): Yoshinori Tokura
  • Organizer: International workshop on nano-spin conversion science and quantum spin dynamics
  • Place of Presentation: University of Tokyo, Bunkyo-ku, Tokyo, Japan
  • Year and Date: 2016-10-12 – 2016-10-15
  • Int'l Joint Research / Invited
• [Presentation] 外場誘起相転移を示すVO2薄膜の実動作下 X 線回折 (Operando x-ray diffraction study in VO2 thin-film with external field induced phase transition) (2016)
  • Author(s): 奥山大輔
  • Organizer: 日本物理学会2016年秋季大会（シンポジウム講演）
  • Place of Presentation: 金沢大学、金沢市、石川
  • Year and Date: 2016-09-13 – 2016-09-16
• [Presentation] MnSi の磁場誘起強磁性相におけるマグノン分散シフト (2016)
  • Author(s): 佐藤卓, 奥山大輔, T. Hong, 吉川明子, 田口康二郎, 有馬孝尚, 十倉好紀
  • Organizer: 日本物理学会2016年秋季大会
  • Place of Presentation: 金沢大学、金沢市、石川
  • Year and Date: 2016-09-13 – 2016-09-16
• [Presentation] Nonlinear responses in topological systems (2016)
  • Author(s): N. Nagaosa
  • Organizer: TRR80 International Workshop 2016"TRR 80: From Electronic Correlations to Functionality
  • Place of Presentation: Irsee, Freistaat Bayern, Germany
  • Year and Date: 2016-09-12 – 2016-09-15
  • Int'l Joint Research / Invited
• [Presentation] Antiferromagnetic skyrmion-lattice like spin structure in a layered kagome system (2016)
  • Author(s): Reim Johannes D., Mostovoy Maxim, Valldor Martin, Sato Taku J., Schweika Werner
  • Organizer: 8th International Conference on Highly Frustrated Magnetism 2016
  • Place of Presentation: Taipei, Taiwan
  • Year and Date: 2016-09-07 – 2016-09-11
• [Presentation] Phase stability and higher order peaks of the skyrmion lattice in Cu2OSeO3 (2016)
  • Author(s): Reim Johannes D., Makino Koya, Higashi Daiki, Nambu Yusuke, Okuyama Daisuke, Sato Taku J., Gilbert Elliot P., Booth Norman, Seki Shinichiro, and Tokura Yoshinori
  • Organizer: 8th International Conference on Highly Frustrated Magnetism 2016
  • Place of Presentation: Taipei, Taiwan
  • Year and Date: 2016-09-07 – 2016-09-11
• [Presentation] Antiferromagnetic skyrmion-lattice like spin structure in a layered kagome system (2016)
  • Author(s): Reim Johannes, Mostovoy Maxim, Valldor Martin, Sato Taku J., Schweika Werner
  • Organizer: 11th International Conference on Polarised Neutrons for Condensed Matter Investigations 2016
  • Place of Presentation: Reising, Germany
  • Year and Date: 2016-07-04 – 2016-07-07
  • Int'l Joint Research
• [Presentation] Nonlinear and nonreciprocal responses of toplogical matters (2016)
  • Author(s): N. Nagaosa
  • Organizer: TOYOTA RIKEN International Workshop "Dynamics of Electron Vortex and Spin Vortex
  • Place of Presentation: Toyota Commemorative Museum of Industry and Technology, Nagoya, Aichi
  • Year and Date: 2016-07-01 – 2016-07-03
  • Int'l Joint Research / Invited
• [Presentation] Interaction effects in Weyl and Dirac fermions (2016)
  • Author(s): N. Nagaosa
  • Organizer: SCES2016
  • Place of Presentation: Hangzhou, Zhejiang, China
  • Year and Date: 2016-05-08 – 2016-05-13
  • Int'l Joint Research / Invited
• [Remarks] 磁性体における創発電磁気学の創成
  • URL: http://park.itc.u-tokyo.ac.jp/nagaosa-lab/kibanS/index.html