LEONOV ANDREY

Last Updated :2022/08/02

Affiliations, Positions
Graduate School of Advanced Science and Engineering, Associate Professor
E-mail
leonovhiroshima-u.ac.jp

Basic Information

Major Professional Backgrounds

  • 2016/12/01, 2017/03/31, Hiroshima University, Graduate School of Science, Researcher
  • 2017/04/01, 2020/03/31, Hiroshima University, Graduate School of Science, Assistant Professor
  • 2016/01/01, 2016/10/15, Zernike Institute for Advanced Materials, University of Groningen (the Netherlands), postdoc
  • 2015/05/01, 2015/12/31, IFW-Dresden, Institute for Theoretical Solid State Physics, guest-scientist
  • 2012/09/01, 2015/02/01, Zernike Institute for Advanced Materials, University of Groningen, postdoc
  • 2012/06/01, 2012/08/31, Max Planck Institute for the Physics of Complex Systems (Dresden), guest-scientist

Academic Degrees

  • IFW-Dresden

Educational Activity

Course in Charge

  1. 2022, Liberal Arts Education Program1, 1Term, Fundamental Chemistry A
  2. 2022, Undergraduate Education, 4Term, Advanced Chemistry
  3. 2022, Undergraduate Education, First Semester, Special Study for Graduation
  4. 2022, Undergraduate Education, Second Semester, Special Study for Graduation
  5. 2022, Undergraduate Education, First Semester, English Seminar on Chemistry
  6. 2022, Undergraduate Education, Second Semester, English Seminar on Chemistry
  7. 2022, Undergraduate Education, First Semester, Chemical Experiments I
  8. 2022, Undergraduate Education, Second Semester, Chemical Experiments II
  9. 2022, Graduate Education (Master's Program) , 1Term, Exercises in Chemistry A
  10. 2022, Graduate Education (Master's Program) , 2Term, Exercises in Chemistry A
  11. 2022, Graduate Education (Master's Program) , 3Term, Exercises in Chemistry B
  12. 2022, Graduate Education (Master's Program) , 4Term, Exercises in Chemistry B
  13. 2022, Graduate Education (Master's Program) , Academic Year, Master's Thesis in Chemistry

Research Activities

Academic Papers

  1. Asymmetric isolated skyrmions in polar magnets with easy-plane anisotropy, PHYSICAL REVIEW B, 96(1), 20170717
  2. Equilibrium Skyrmion Lattice Ground State in a Polar Easy-plane Magnet, SCIENTIFIC REPORTS, 7, 20170808
  3. Helimagnon Resonances in an Intrinsic Chiral Magnonic Crystal, PHYSICAL REVIEW LETTERS, 119(23), 20171206
  4. Skyrmion robustness in noncentrosymmetric magnets with axial symmetry: The role of anisotropy and tilted magnetic fields, PHYSICAL REVIEW B, 96(21), 20171208
  5. Direct observation of attractive skyrmions and skyrmion clusters in the cubic helimagnet Cu2OSeO3, PHYSICAL REVIEW B, 97(13), 20180405
  6. Crossover of skyrmion and helical modulations in noncentrosymmetric ferromagnets, NEW JOURNAL OF PHYSICS, 20, 20180412
  7. Homogeneous and heterogeneous nucleation of skyrmions in thin layers of cubic helimagnets, Physical Review B, 98, 054404, 20180806
  8. Spin textures induced by quenched disorder in a reentrant spin glass: vortices versus frustrated skyrmions, Physical Review B, 98, 014420, 2018
  9. Crossover of skyrmion and helical modulations in noncentrosymmetric ferromagnets, New Journal of Physics, 20, 043017, 2018
  10. Direct observation of attractive skyrmions and skyrmion clusters in the cubic helimagnet Cu2OSeO3, Physical Review B, 97, 134403, 2018
  11. Spin textures induced by quenched disorder in a reentrant spin glass: Vortices versus "frustrated" skyrmions, PHYSICAL REVIEW B, 98(1), 20180719
  12. Homogeneous and heterogeneous nucleation of skyrmions in thin layers of cubic helimagnets, PHYSICAL REVIEW B, 98(5), 20180806
  13. Toggle-switch-like crossover between two types of isolated skyrmions within the conical phase of cubic helimagnets, PHYSICAL REVIEW B, 98(6), 20180823
  14. ★, New magnetic phase of the chiral skyrmion material Cu2OSeO3, SCIENCE ADVANCES, 4(9), 201809
  15. Spintronics via non-axisymmetric skyrmions, Applied Physics Letters, 109(172404), 2016
  16. Scaling Study and Thermodynamic Properties of the cubic Helimagnet FeGe, Physical Review B, 94, 144424, 2016
  17. ★, Chiral surface twists and skyrmion stability in nanolayers of cubic helimagnets, Physical Review Letters, 117(087202), 087202, 2016
  18. ★, The properties of isolated chiral skyrmions in thin magnetic films, New Journal of Physics, 18(065003), 065003, 2016
  19. Skyrmion dynamics under uniaxial anisotropy, Physical Review B, 94(014406), 014406, 2016
  20. Internal structure of hexagonal skyrmion lattices in cubic helimagnets, New Journal of Physics, 18(095004), 095004, 2016
  21. Three-dimensional chiral skyrmions with attractive interparticle interactions, Journal of Physics: Condensed Matter, 28(35LT01), 35LT01, 2016
  22. ★, Multiply periodic states and isolated skyrmions in an anisotropic frustrated magnet, Nature Communications, 6(8275), 8275, 2015
  23. Néèl skyrmions in confined geometries and at nonzero temperatures, Physical Review B, 92(134405), 134405, 2015
  24. Theory of skyrmion states in liquid crystals, Physical Review E, 90(042502), 2014
  25. ★, The quantum origins of skyrmions and half-skyrmions in Cu2OSeO3, Nature Communications, 5(5376), 5376, 2014
  26. Skyrmion clusters and conical droplets in bulk helimagnets with cubic anisotropy, PHYSICAL REVIEW B, 99(14), 20190412
  27. ★, Real-space observation of skyrmion clusters with mutually orthogonal skyrmion tubes, Physical Review B, 100(104401), 2019
  28. ★, Skyrmions and spirals in MnSi under hydrostatic pressure, Physical Review B, 100(054447), 2019
  29. ★, Skyrmion instabilities and distorted spiral states in a frustrated chiral magnet, Physical Review B (Rapid Communications), 100(060407(R)), 2019
  30. ★, Multiple low-temperature skyrmionic states in a bulk chiral magnet, npj (Nature Partner Journal) Quantum Materials, 4(11), 2019
  31. ★, Skyrmion clusters and conical droplets in bulk helimagnets with cubic anisotropy, Physical Review B, 99(144410), 2019
  32. Skyrmion instabilities and distorted spiral states in a frustrated chiral magnet, PHYSICAL REVIEW B, 100(6), 20190820
  33. Skyrmions and spirals in MnSi under hydrostatic pressure, PHYSICAL REVIEW B, 100(5), 20190830
  34. Real-space observation of skyrmion clusters with mutually orthogonal skyrmion tubes, PHYSICAL REVIEW B, 100(10), 20190903
  35. Multiple low-temperature skyrmionic states in a bulk chiral magnet, NPJ QUANTUM MATERIALS, 4, 20190401
  36. Skyrmion flop transition and congregation of mutually orthogonal skyrmions in cubic helimagnets, JOURNAL OF PHYSICS-CONDENSED MATTER, 32(18), 20200501
  37. Macroscopic manifestation of domain-wall magnetism and magnetoelectric effect in a Neel-type skyrmion host, NPJ QUANTUM MATERIALS, 5(1), 20200706
  38. Current-induced shuttlecock-like movement of non-axisymmetric chiral skyrmions, SCIENTIFIC REPORTS, 10(1), 20200115
  39. Stability of Néel-type skyrmion lattice against oblique magnetic fields in GaV4S8 and GaV4Se8, Physical Review B, 102(104407), 2020
  40. ★, Macroscopic manifestation of domain-wall magnetism and magnetoelectric effect in a Néel-type skyrmion host, npj (Nature Partner Journal) Quantum Materials, 5(44), 2020
  41. ★, Current-induced shuttlecock-like movement of non-axisymmetric chiral skyrmions, Scientific Reports, 10(396), 2020

Publications such as books

  1. 2021/06/03, Magnetic Skyrmions and Their Applications, Edited by Giovanni Finocchio and Christos Panagopoulos, - Covers background knowledge and details the basic principles of magnetic skyrmions, including materials, characterization, statics and dynamics - Reviews materials for skyrmion stabilization including bulk materials and interface-dominated multilayer materials - Describes both well-known and unconventional applications of magnetic skyrmions, such as memristors and reservoir computing, 2021, Textbook, Others, English, Andrey O. Leonov and Catherine Pappas, ISBN: 978-0-12-820815-1

Invited Lecture, Oral Presentation, Poster Presentation

  1. The properties of isolated chiral skyrmions, MATHEMATICAL CHALLENGES OF QUANTUM TRANSPORT IN NANOSYSTEMS -PIERRE DUCLOS WORKSHOP, 2020/09/15, With Invitation, English, Saint Petersburg (Russia), online
  2. Three-dimensional skyrmionic networks in chiral magnets and liquid crystals, Virtual MRS Fall meeting and Exhibit, 2020/12/01, With Invitation, English, online
  3. Skyrmion clusters, International Workshop Spintronics SpinPeru-2019, 2019, With Invitation, English, Cusco (Peru), Cusco (Peru)
  4. 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, With Invitation, English, Comaruga (Spain)
  5. Non-axisymmetric chiral skyrmions, International Conference of Magnetism and Spintronics, SolSkyMag-2018, 2018, With Invitation, English, San Sebastian (Spain)
  6. The Properties of Isolated Skyrmions in Chiral Magnets and Liquid Crystals, 6th International Conference on Superconductivity and Magnetism, ICSM-2018, 2018, With Invitation, English, Antalya (Turkey)
  7. The properties of isolated skyrmions in chiral and frustrated magnets, SkyMag, Challenges for Magnetic Skyrmions, 2017, Without Invitation, English, Paris (France)
  8. Multi-channel topological edge states: skyrmion dynamics in nanostripes of frustrated magnets, Spin Orbit Coupling and Topology in Low Dimensions, 2016, With Invitation, English, Spetses, Greece
  9. Chiral skyrmions: overview of perspectives, International Symposium on Chiral Magnetism, 2018, With Invitation, English, Nara (Japan)
  10. Chiral skyrmions in non-centrosymmetric magnets, the International Summer School, 2017, With Invitation, English, Hiroshima (Japan)
  11. Introduction into the physics of chiral skyrmions, Without Invitation, English, Hiroshima (Japan)
  12. Introduction into the physics of chiral skyrmions, 2016, With Invitation, English, Osaka (Japan)
  13. Skyrmions in frustrated magnets, 2016, With Invitation, English, Javier Campo, Instituto de Ciencia de Materiales de Aragon, Zaragoza, Spain
  14. How to tame the chiral skyrmion? Short manual, Intensive discussion workshop on theoretical magnetic skyrmion physics, With Invitation, English, invited by Prof. G. Tatara, Hakone, Japan
  15. Skyrmion cluster formation and precursor states in cubic chiral and frustrated magnets, Topical meeting of Center for Chiral Science, 2015, With Invitation, English, invited by Prof. Katsuya Inoue, Hiroshima, Japan
  16. Theory of skyrmions in chiral and frustrated magnets, 2015, With Invitation, English, invited by Prof. G. Tatara, RIKEN, Tokyo
  17. Theory of skyrmions in chiral magnets, 2015, With Invitation, English, invited by Prof. A. Loidl, Augsburg (Germany)
  18. Current-induced motion of skyrmions guided by multi-channel edge states, 2015, With Invitation, English, invited by Prof. I. Kezsmarki, Budapest (Hungary)
  19. Skyrmions in frustrated magnets, 2014, With Invitation, English, invited by Prof. Theo Rasing, Radboud University Nijmegen, the Netherlands
  20. Current-driven motion of frustrated skyrmions, 2014, With Invitation, English, invited by Prof. R. Duine, Utrecht, the Netherlands
  21. Physics of skyrmions in confined geometries, 2014, With Invitation, English, invited by Prof. M. Mostovoy, University of Groningen, the Netherlands
  22. Skyrmions in chiral and frustrated magnets, 2014, With Invitation, English, invited by Dr. U. Roessler, Institute for Theoretical Solid State Physics, Dresden, Germany
  23. Skyrmions in chiral and frustrated magnets, SFB 668 - Kolloquium, Magnetismus vom Einzelatom zur Nanostruktur, 2014, With Invitation, English, invited by Prof. R. Wiesendanger, University of Hamburg, Hamburg, Germany
  24. Skyrmions in chiral magnets, 2013, With Invitation, English, invited by Dr. D. Menzel, TU Braunschweig, Germany
  25. Skyrmions in chiral and frustrated magnets, 2013, With Invitation, English, invited by Prof. S. Bluegel, Institut fuer Festkoerperforschung, FZ Juelich, Germany
  26. Chiral skyrmions in magnets (short overview of essentials), 2012, With Invitation, English, invited by Prof.B. Idzikowski, Institute of Molecular Physics of the Polish Academy of Sciences, Poznan, Poland
  27. the properties of isolated chiral skyrmions, 2018, With Invitation, English, invited by Prof. C. Pappas, Delft, the Netherlands
  28. Theoretical studies on H-T phase diagrams of chiral magnets, Research Progress Meeting on Chiral Magnets, 2017, With Invitation, English, Takeo, Japan
  29. Spintronics via Non-axisymmetric Chiral Skyrmions, Research Progress Meeting on Chiral Magnets, 2017, With Invitation, English, Takeo, Japan
  30. Skyrmion dynamics in nanostripes of frustrated magnets, The CMD26 Conference in Groningen, 2016, Without Invitation, English, Groningen, The Netherlands
  31. 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, Without Invitation, English, Dresden, Germany
  32. 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, Without Invitation, English, Dresden, Germany
  33. Skyrmion states in classical triangular-lattice Heisenberg antiferromagnet with frustrated interactions, Physics@FOM Veldhoven, 2014, Without Invitation, English, Veldhoven, the Netherlands
  34. Novel skyrmion states in nanowires of chiral magnets, Joint European Magnetic Symposia, 2013, Without Invitation, English, Rhodes, Greece
  35. Multiple-q states in classical triangular-lattice Heisenberg antiferromagnet with frustrated interactions, International workshop, Dzyaloshinskii-Moriya interaction and exotic spin structures, 2013, Without Invitation, English, Veliky Novgorod, Russia
  36. 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, Without Invitation, English, Regensburg, Germany

External Funds

Acceptance Results of Competitive Funds

  1. KAKENHI(Grant-in-Aid for Research Activity Start-up), 2017, 2018

Social Activities

History as Peer Reviews of Academic Papers

  1. 2019, Physical Review B, Others, peer-review, 8