ANDREY LEONOVLEONOV ANDREY

Last Updated :2026/10/02

所属・職名
大学院先進理工系科学研究科 准教授
ホームページ
メールアドレス
leonovhiroshima-u.ac.jp

基本情報

主な職歴

  • 2016年12月01日, 2017年03月31日, 広島大学, 大学院理学研究科, 研究員
  • 2017年04月01日, 2020年03月31日, 広島大学, 大学院理学研究科, 助教
  • 2016年01月01日, 2016年10月15日, グローニンゲン大学(オランダ)ゼルニケ先端材料研究所, ポスドク
  • 2015年05月01日, 2015年12月31日, IFW-ドレスデン、理論物理学研究所, ゲストサイエンティスト
  • 2012年09月01日, 2015年02月01日, グローニンゲン大学ゼルニケ研究所, ポスドク
  • 2012年06月01日, 2012年08月31日, マックスプランク複雑系物理学研究所(ドレスデン), ゲストサイエンティスト

学位

  • Dr.rer.nat. (IFW-Dresden)

教育活動

授業担当

  1. 2026年, 教養教育, 1ターム, Fundamental Chemistry A
  2. 2026年, 学部専門, 1ターム, 無機固体化学
  3. 2026年, 修士課程・博士課程前期, 3ターム, Chiral Topological Solitons

研究活動

学術論文(★は代表的な論文)

  1. ★, Attractive hopfions and bimerons in thin films of chiral magnets: Cluster formation and lattice instability in the conical phase, Physical Review B, 113巻, 22号, pp. 224441, 20260623
  2. Cholesteric fingers from a magnetic perspective: Topology, energetics, and interactions, PHYSICAL REVIEW E, 114巻, 1号, 20260714
  3. Stability and interactions of hopfions in confined chiral systems: Role of the background phase, PHYSICAL REVIEW E, 114巻, 1号, 20260726
  4. Precursor behavior, bag formation, and lattice instabilities of confined hopfions in chiral magnetic films, PHYSICAL REVIEW RESEARCH, 8巻, 2号, 20260521
  5. Current-induced dynamics and instability pathways of skyrmioniums in chiral magnets, JOURNAL OF APPLIED PHYSICS, 139巻, 17号, 20260507
  6. Cubic magnetic anisotropy in B20 magnets: Interplay of anisotropy and magnetic order in Fe1-xCoxSi, PHYSICAL REVIEW B, 113巻, 10号, 20260301
  7. Skyrmionium metamatter: A topologically heterogeneous magnetic crystal with emergent hybrid dynamics, PHYSICAL REVIEW MATERIALS, 10巻, 3号, 20260302
  8. Low-temperature skyrmions and spiral reorientation processes in chiral magnets with cubic anisotropy: Guidelines for bridging theory and experiment, PHYSICAL REVIEW RESEARCH, 8巻, 1号, 20260205
  9. Swirling of Horizontal Skyrmions into Hopfions in Bulk Cubic Helimagnets, MAGNETISM, 3巻, 4号, pp. 297-307, 20231019
  10. Chiral Modulations in Non-Heisenberg Models of Non-Centrosymmetric Magnets Near the Ordering Temperatures, MAGNETISM, 4巻, 2号, pp. 91-103, 20240401
  11. Reorientation Transition Between Square and Hexagonal Skyrmion Lattices near the Saturation into the Homogeneous State in Quasi-Two-Dimensional Chiral Magnets, NANOMATERIALS, 14巻, 23号, 202412
  12. Mechanism of skyrmionium stability in quasi-two-dimensional chiral magnets, PHYSICAL REVIEW B, 110巻, 9号, 20240903
  13. Meron-Mediated Phase Transitions in Quasi-Two-Dimensional Chiral Magnets with Easy-Plane Anisotropy: Successive Transformation of the Hexagonal Skyrmion Lattice into the Square Lattice and into the Tilted FM State, NANOMATERIALS, 14巻, 18号, 202409
  14. Polymerization of Bimerons in Quasi-Two-Dimensional Chiral Magnets with Easy-Plane Anisotropy, NANOMATERIALS, 14巻, 6号, 202403
  15. Precursor skyrmion states near the ordering temperatures of chiral magnets, PHYSICAL CHEMISTRY CHEMICAL PHYSICS, 25巻, 42号, pp. 28691-28702, 20231101
  16. Tilted spirals and low-temperature skyrmions in Cu2OSeO3, PHYSICAL REVIEW RESEARCH, 5巻, 3号, 20230718
  17. Mechanism of Skyrmion Attraction in Chiral Magnets near the Ordering Temperatures, NANOMATERIALS, 13巻, 5号, 202303
  18. Reorientation processes of tilted skyrmion and spiral states in a bulk cubic helimagnet Cu2OSeO3, FRONTIERS IN PHYSICS, 11巻, 20230202
  19. Topological boundaries between helical domains as a nucleation source of skyrmions in the bulk cubic helimagnet Cu(2)OSeO3, PHYSICAL REVIEW RESEARCH, 4巻, 4号, 20221128
  20. Skyrmion and meron ordering in quasi-two-dimensional chiral magnets, PHYSICAL REVIEW B, 106巻, 22号, 20221226
  21. Nuclear and Electron Spin Resonance Studies on Skyrmion-Hosting Lacunar Spinels, PHYSICA STATUS SOLIDI B-BASIC SOLID STATE PHYSICS, 259巻, 5号, 202205
  22. Topological structures in chiral media: Effects of confined geometry, PHYSICAL REVIEW E, 105巻, 3号, 20220321
  23. Skyrmion clusters and chains in bulk and thin-layered cubic helimagnets, PHYSICAL REVIEW B, 105巻, 9号, 20220302
  24. Asymmetric isolated skyrmions in polar magnets with easy-plane anisotropy, PHYSICAL REVIEW B, 96巻, 1号, 20170717
  25. Equilibrium Skyrmion Lattice Ground State in a Polar Easy-plane Magnet, SCIENTIFIC REPORTS, 7巻, 20170808
  26. Helimagnon Resonances in an Intrinsic Chiral Magnonic Crystal, PHYSICAL REVIEW LETTERS, 119巻, 23号, 20171206
  27. Skyrmion robustness in noncentrosymmetric magnets with axial symmetry: The role of anisotropy and tilted magnetic fields, PHYSICAL REVIEW B, 96巻, 21号, 20171208
  28. Direct observation of attractive skyrmions and skyrmion clusters in the cubic helimagnet Cu2OSeO3, PHYSICAL REVIEW B, 97巻, 13号, 20180405
  29. Crossover of skyrmion and helical modulations in noncentrosymmetric ferromagnets, NEW JOURNAL OF PHYSICS, 20巻, 20180412
  30. Homogeneous and heterogeneous nucleation of skyrmions in thin layers of cubic helimagnets, Physical Review B, 98巻, pp. 054404, 20180806
  31. Spin textures induced by quenched disorder in a reentrant spin glass: vortices versus frustrated skyrmions, Physical Review B, 98巻, pp. 014420, 2018
  32. Crossover of skyrmion and helical modulations in noncentrosymmetric ferromagnets, New Journal of Physics, 20巻, pp. 043017, 2018
  33. Direct observation of attractive skyrmions and skyrmion clusters in the cubic helimagnet Cu2OSeO3, Physical Review B, 97巻, pp. 134403, 2018
  34. Spin textures induced by quenched disorder in a reentrant spin glass: Vortices versus "frustrated" skyrmions, PHYSICAL REVIEW B, 98巻, 1号, 20180719
  35. Homogeneous and heterogeneous nucleation of skyrmions in thin layers of cubic helimagnets, PHYSICAL REVIEW B, 98巻, 5号, 20180806
  36. Toggle-switch-like crossover between two types of isolated skyrmions within the conical phase of cubic helimagnets, PHYSICAL REVIEW B, 98巻, 6号, 20180823
  37. ★, New magnetic phase of the chiral skyrmion material Cu2OSeO3, SCIENCE ADVANCES, 4巻, 9号, 201809
  38. Spintronics via non-axisymmetric skyrmions, Applied Physics Letters, 109巻, 172404号, 2016
  39. Scaling Study and Thermodynamic Properties of the cubic Helimagnet FeGe, Physical Review B, 94巻, pp. 144424, 2016
  40. ★, Chiral surface twists and skyrmion stability in nanolayers of cubic helimagnets, Physical Review Letters, 117巻, 087202号, pp. 087202, 2016
  41. ★, The properties of isolated chiral skyrmions in thin magnetic films, New Journal of Physics, 18巻, 065003号, pp. 065003, 2016
  42. Skyrmion dynamics under uniaxial anisotropy, Physical Review B, 94巻, 014406号, pp. 014406, 2016
  43. Internal structure of hexagonal skyrmion lattices in cubic helimagnets, New Journal of Physics, 18巻, 095004号, pp. 095004, 2016
  44. Three-dimensional chiral skyrmions with attractive interparticle interactions, Journal of Physics: Condensed Matter, 28巻, 35LT01号, pp. 35LT01, 2016
  45. ★, Multiply periodic states and isolated skyrmions in an anisotropic frustrated magnet, Nature Communications, 6巻, 8275号, pp. 8275, 2015
  46. Néèl skyrmions in confined geometries and at nonzero temperatures, Physical Review B, 92巻, 134405号, pp. 134405, 2015
  47. Theory of skyrmion states in liquid crystals, Physical Review E, 90巻, 042502号, 2014
  48. ★, The quantum origins of skyrmions and half-skyrmions in Cu2OSeO3, Nature Communications, 5巻, 5376号, pp. 5376, 2014
  49. Skyrmion clusters and conical droplets in bulk helimagnets with cubic anisotropy, PHYSICAL REVIEW B, 99巻, 14号, 20190412
  50. ★, Real-space observation of skyrmion clusters with mutually orthogonal skyrmion tubes, Physical Review B, 100巻, 104401号, 2019
  51. ★, Skyrmions and spirals in MnSi under hydrostatic pressure, Physical Review B, 100巻, 054447号, 2019
  52. ★, Skyrmion instabilities and distorted spiral states in a frustrated chiral magnet, Physical Review B (Rapid Communications), 100巻, 060407(R)号, 2019
  53. ★, Multiple low-temperature skyrmionic states in a bulk chiral magnet, npj (Nature Partner Journal) Quantum Materials, 4巻, 11号, 2019
  54. ★, Skyrmion clusters and conical droplets in bulk helimagnets with cubic anisotropy, Physical Review B, 99巻, 144410号, 2019
  55. Skyrmion instabilities and distorted spiral states in a frustrated chiral magnet, PHYSICAL REVIEW B, 100巻, 6号, 20190820
  56. Skyrmions and spirals in MnSi under hydrostatic pressure, PHYSICAL REVIEW B, 100巻, 5号, 20190830
  57. Real-space observation of skyrmion clusters with mutually orthogonal skyrmion tubes, PHYSICAL REVIEW B, 100巻, 10号, 20190903
  58. Multiple low-temperature skyrmionic states in a bulk chiral magnet, NPJ QUANTUM MATERIALS, 4巻, 20190401
  59. Skyrmion flop transition and congregation of mutually orthogonal skyrmions in cubic helimagnets, JOURNAL OF PHYSICS-CONDENSED MATTER, 32巻, 18号, 20200501
  60. Macroscopic manifestation of domain-wall magnetism and magnetoelectric effect in a Neel-type skyrmion host, NPJ QUANTUM MATERIALS, 5巻, 1号, 20200706
  61. Current-induced shuttlecock-like movement of non-axisymmetric chiral skyrmions, SCIENTIFIC REPORTS, 10巻, 1号, 20200115
  62. Stability of Néel-type skyrmion lattice against oblique magnetic fields in GaV4S8 and GaV4Se8, Physical Review B, 102巻, 104407号, 2020
  63. ★, Macroscopic manifestation of domain-wall magnetism and magnetoelectric effect in a Néel-type skyrmion host, npj (Nature Partner Journal) Quantum Materials, 5巻, 44号, 2020
  64. ★, Current-induced shuttlecock-like movement of non-axisymmetric chiral skyrmions, Scientific Reports, 10巻, 396号, 2020
  65. Stability of Neel-type skyrmion lattice against oblique magnetic fields in GaV4S8 and GaV4Se8, PHYSICAL REVIEW B, 102巻, 10号, 20200903
  66. Stability of in-plane and out-of-plane chiral skyrmions in epitaxial MnSi(111)/Si(111) thin films: Surface twists versus easy-plane anisotropy, PHYSICAL REVIEW B, 102巻, 17号, 20201109
  67. Field and anisotropy driven transformations of spin spirals in cubic skyrmion hosts, PHYSICAL REVIEW RESEARCH, 2巻, 4号, 20201217
  68. Evolution of helimagnetic correlations when approaching the quantum critical point of Mn1-xFexSi, PHYSICAL REVIEW RESEARCH, 3巻, 1号, 20210108
  69. Field-driven metamorphoses of isolated skyrmions within the conical state of cubic helimagnets, PHYSICAL REVIEW B, 104巻, 6号, 20210818
  70. Surface anchoring as a control parameter for shaping skyrmion or toron properties in thin layers of chiral nematic liquid crystals and noncentrosymmetric magnets, PHYSICAL REVIEW E, 104巻, 4号, 20211013

著書等出版物

  1. 2021年06月03日, 2021年, 教科書, その他, English, ISBN: 978-0-12-820815-1

招待講演、口頭・ポスター発表等

  1. 2020年09月15日, 招待, 英語
  2. Three-dimensional skyrmionic networks in chiral magnets and liquid crystals, 2020年12月01日, 招待, 英語
  3. Сlusters with mutually orthogonal skyrmion tubes, International Workshop Spintronics SpinPeru-2019, 2019年, 招待, 英語, Cusco (Peru), Cusco (Peru)
  4. 通常, 日本語
  5. Homogeneous and heterogeneous nucleation of skyrmions in thin layers of cubic helimagnets and liquid crystals, 14th International Workshop on Magnetism & Superconductivity at the Nanoscale, 2018年, 招待, 英語, Comaruga (Spain)
  6. Non-axisymmetric chiral skyrmions, International Conference of Magnetism and Spintronics, SolSkyMag-2018, 2018年, 招待, 英語, San Sebastian (Spain)
  7. The Properties of Isolated Skyrmions in Chiral Magnets and Liquid Crystals, 6th International Conference on Superconductivity and Magnetism, ICSM-2018, 2018年, 招待, 英語, Antalya (Turkey)
  8. The properties of isolated skyrmions in chiral and frustrated magnets, SkyMag, Challenges for Magnetic Skyrmions, 2017年, 通常, 英語, Paris (France)
  9. Multi-channel topological edge states: skyrmion dynamics in nanostripes of frustrated magnets, Spin Orbit Coupling and Topology in Low Dimensions, 2016年, 招待, 英語, Spetses, Greece
  10. Chiral skyrmions: overview of perspectives, International Symposium on Chiral Magnetism, 2018年, 招待, 英語, Nara (Japan)
  11. Chiral skyrmions in non-centrosymmetric magnets, the International Summer School, 2017年, 招待, 英語, Hiroshima (Japan)
  12. Introduction into the physics of chiral skyrmions, 通常, 英語, Hiroshima (Japan)
  13. Introduction into the physics of chiral skyrmions, 2016年, 招待, 英語, Osaka (Japan)
  14. Skyrmions in frustrated magnets, 2016年, 招待, 英語, Javier Campo, Instituto de Ciencia de Materiales de Aragon, Zaragoza, Spain
  15. How to tame the chiral skyrmion? Short manual, Intensive discussion workshop on theoretical magnetic skyrmion physics, 招待, 英語, invited by Prof. G. Tatara, Hakone, Japan
  16. Skyrmion cluster formation and precursor states in cubic chiral and frustrated magnets, Topical meeting of Center for Chiral Science, 2015年, 招待, 英語, invited by Prof. Katsuya Inoue, Hiroshima, Japan
  17. Theory of skyrmions in chiral and frustrated magnets, 2015年, 招待, 英語, invited by Prof. G. Tatara, RIKEN, Tokyo
  18. Theory of skyrmions in chiral magnets, 2015年, 招待, 英語, invited by Prof. A. Loidl, Augsburg (Germany)
  19. Current-induced motion of skyrmions guided by multi-channel edge states, 2015年, 招待, 英語, invited by Prof. I. Kezsmarki, Budapest (Hungary)
  20. Skyrmions in frustrated magnets, 2014年, 招待, 英語, invited by Prof. Theo Rasing, Radboud University Nijmegen, the Netherlands
  21. Current-driven motion of frustrated skyrmions, 2014年, 招待, 英語, invited by Prof. R. Duine, Utrecht, the Netherlands
  22. Physics of skyrmions in confined geometries, 2014年, 招待, 英語, invited by Prof. M. Mostovoy, University of Groningen, the Netherlands
  23. Skyrmions in chiral and frustrated magnets, 2014年, 招待, 英語, invited by Dr. U. Roessler, Institute for Theoretical Solid State Physics, Dresden, Germany
  24. Skyrmions in chiral and frustrated magnets, SFB 668 - Kolloquium, Magnetismus vom Einzelatom zur Nanostruktur, 2014年, 招待, 英語, invited by Prof. R. Wiesendanger, University of Hamburg, Hamburg, Germany
  25. Skyrmions in chiral magnets, 2013年, 招待, 英語, invited by Dr. D. Menzel, TU Braunschweig, Germany
  26. Skyrmions in chiral and frustrated magnets, 2013年, 招待, 英語, invited by Prof. S. Bluegel, Institut fuer Festkoerperforschung, FZ Juelich, Germany
  27. Chiral skyrmions in magnets (short overview of essentials), 2012年, 招待, 英語, invited by Prof.B. Idzikowski, Institute of Molecular Physics of the Polish Academy of Sciences, Poznan, Poland
  28. the properties of isolated chiral skyrmions, 2018年, 招待, 英語, invited by Prof. C. Pappas, Delft, the Netherlands
  29. Theoretical studies on H-T phase diagrams of chiral magnets, Research Progress Meeting on Chiral Magnets, 2017年, 招待, 英語, Takeo, Japan
  30. Spintronics via Non-axisymmetric Chiral Skyrmions, Research Progress Meeting on Chiral Magnets, 2017年, 招待, 英語, Takeo, Japan
  31. Skyrmion dynamics in nanostripes of frustrated magnets, The CMD26 Conference in Groningen, 2016年, 通常, 英語, Groningen, The Netherlands
  32. Skyrmion states in triangular-lattice Heisenberg antiferromagnet with frustrated interactions, The Annual Meeting of the Deutsche Physikalische Gesellschaft and DPG - Spring meeting of the Division Condensed Matter, 2014年, 通常, 英語, Dresden, Germany
  33. The role of cubic anisotropy in the thermodynamical stability of skyrmions and half-skyrmions in cubic helimagnets, The Annual Meeting of the Deutsche Physikalische Gesellschaft and DPG - Spring meet-ing of the Division Condensed Matter, 2014年, 通常, 英語, Dresden, Germany
  34. Skyrmion states in classical triangular-lattice Heisenberg antiferromagnet with frustrated interactions, Physics@FOM Veldhoven, 2014年, 通常, 英語, Veldhoven, the Netherlands
  35. Novel skyrmion states in nanowires of chiral magnets, Joint European Magnetic Symposia, 2013年, 通常, 英語, Rhodes, Greece
  36. Multiple-q states in classical triangular-lattice Heisenberg antiferromagnet with frustrated interactions, International workshop, Dzyaloshinskii-Moriya interaction and exotic spin structures, 2013年, 通常, 英語, Veliky Novgorod, Russia
  37. Multiple-q states in classical triangular-lattice Heisenberg antiferromagnet with frustrated interactions, The Annual Meeting of the Deutsche Physikalische Gesellschaft and DPG - Spring meet-ing of the Division Condensed Matter, 2013年, 通常, 英語, Regensburg, Germany

外部資金

競争的資金等の採択状況

  1. 科学研究費助成事業(基盤研究(C)), Skyrmionic LEGO- entangled skyrmion networks in chiral magnets and liquid crystals, 2021年, 2023年
  2. 科学研究費助成事業(研究活動スタート支援), Non-axisymmetric skyrmions in chiral and frustrated magnets, 2017年, 2018年

社会活動

学術雑誌論文査読歴

  1. 2019年, その他, 8