Magnon Chemistry

2021 年度 実績報告書

• 研究課題/領域番号: 19H00645
• 研究機関: 東北大学
• 研究代表者: Bauer Gerrit 東北大学, 材料科学高等研究所, 教授 (10620213)
• 研究期間 (年度): 2019-04-01 – 2024-03-31
• キーワード: Spintronics / magnonics / cavities / ferroelectriscs

研究実績の概要

In the fiscal year 2021-22, we continued developing the magnon chemistry in several directions. The coupling of magnons with phonons, for example, led to the discovery of a new magnonic molecule of the Kittel mode of two distance magnets through a non-magnetic spacer over mm distances. This work was helped by a thorough theoretical analysis of the magnetoelastic boundary conditions. We also identified the importance of damping by magnon-induced eddy currents in proximity gates by direct imaging using diamond NV-center microscopy. We have been preparing the ground for the magnonics in 2D magnetic systems by carrying out analytic calculation in ferromagnetic single and double van der Waals layers as well as studying ultrathin layers of the magnetic insulator YIG. Making use of the analogies of magnetic and electric dipoles we invented the new field of “ferronics” that studies the elementary excitations of the ferroelectric order. The theoretical study laid the basis of a new Kiban S project led by Prof. K. Uchida from NIMS.

現在までの達成度 (区分)

1: 当初の計画以上に進展している

理由

The project continued to proceed in an auspicious way, mainly because of the inspiration we enjoyed from our experimental colleagues with whom we collaborate intensively. For example, the concept of the magnon-parametron invented by Eiji Saitoh c.s. has many interesting theoretical questions we were able to answer by non-linear magnonics. Challenging questions from Ken-ichi Uchida motivated us to develop the new field of ferronics.

今後の研究の推進方策

Coming to the end of this project, we will continue to push the theory of magnon chemistry in different directions. The progress in material growth and device fabrication of magnetic tunnel junctions, magnetic insulators, and van der Waals materials deserves special attention of theory to describe two-dimensional systems, magnon-magnon interactions, antiferromagnets, and quantum effects. We will continue to use a combination of analytic and numerical method to inspire and get inspired by the experimental collaborators in Japan and the whole world.

研究成果

• [雑誌論文] Nonlinear Magnon Polaritons (2023)
  • 著者名/発表者名: Lee Oscar、Yamamoto Kei、Umeda Maki、Zollitsch Christoph W.、Elyasi Mehrdad、Kikkawa Takashi、Saitoh Eiji、Bauer Gerrit E.W.、Kurebayashi Hidekazu
  • 雑誌名: Physical Review Letters 巻: 130 ページ: 4~27
  • DOI: 10.1103/PhysRevLett.130.046703
  • 査読あり / オープンアクセス / 国際共著
• [雑誌論文] Magnonics vs. Ferronics (2022)
  • 著者名/発表者名: Bauer Gerrit E.W.、Tang Ping、Iguchi Ryo、Uchida Ken-ichi
  • 雑誌名: Journal of Magnetism and Magnetic Materials 巻: 541 ページ: pp.1-6
  • DOI: 10.1016/j.jmmm.2021.168468
  • 査読あり / オープンアクセス / 国際共著
• [雑誌論文] Thermoelectric Polarization Transport in Ferroelectric Ballistic Point Contacts (2022)
  • 著者名/発表者名: Tang Ping、Iguchi Ryo、Uchida Ken-ichi、Bauer Gerrit E.?W.
  • 雑誌名: Physical Review Letters 巻: 128 ページ: pp.1-6
  • DOI: 10.1103/PhysRevLett.128.047601
  • 査読あり / オープンアクセス / 国際共著
• [雑誌論文] Stochasticity of the magnon parametron (2022)
  • 著者名/発表者名: Elyasi Mehrdad、Saitoh Eiji、Bauer Gerrit E. W.
  • 雑誌名: Physical Review B 巻: 105 ページ: pp.1-7
  • DOI: 10.1103/PhysRevB.105.054403
  • 査読あり / オープンアクセス
• [雑誌論文] Bright and Dark States of Two Distant Macrospins Strongly Coupled by Phonons (2022)
  • 著者名/発表者名: An K.、Kohno R.、Litvinenko A.?N.、Seeger R.?L.、Naletov V.?V.、Vila L.、de Loubens G.、Ben Youssef J.、Vukadinovic N.、Bauer G.?E.?W.、Slavin A.?N.、Tiberkevich V.?S.、Klein O.
  • 雑誌名: Physical Review X 巻: 12 ページ: 011060
  • DOI: 10.1103/PhysRevX.12.011060
  • 査読あり / オープンアクセス / 国際共著
• [雑誌論文] Magnetic order of Dy3+ and Fe3+ moments in antiferromagnetic DyFeO3 probed by spin Hall magnetoresistance and spin Seebeck effect (2021)
  • 著者名/発表者名: Hoogeboom G. R.、Kuschel T.、Bauer G. E. W.、Mostovoy M. V.、Kimel A. V.、van Wees B. J.
  • 雑誌名: Physical Review B 巻: 103 ページ: pp.1-11
  • DOI: 10.1103/PhysRevB.103.134406
  • 査読あり / オープンアクセス / 国際共著
• [雑誌論文] Magnon dispersion in bilayers of two-dimensional ferromagnets (2021)
  • 著者名/発表者名: Ortmanns Lara C.、Bauer Gerrit E. W.、Blanter Yaroslav M.
  • 雑誌名: Physical Review B 巻: 103 ページ: pp.1-8
  • DOI: 10.1103/PhysRevB.103.155430
  • 査読あり / オープンアクセス / 国際共著
• [雑誌論文] Theory of Transport in Ferroelectric Capacitors (2021)
  • 著者名/発表者名: Bauer Gerrit E.?W.、Iguchi Ryo、Uchida Ken-ichi
  • 雑誌名: Physical Review Letters 巻: 126 ページ: pp.1-4
  • DOI: 10.1103/PhysRevLett.126.187603
  • 査読あり / オープンアクセス / 国際共著
• [雑誌論文] Electrically induced strong modulation of magnon transport in ultrathin magnetic insulator films (2021)
  • 著者名/発表者名: Liu J.、Wei X-Y.、Bauer G. E. W.、Youssef J. Ben、van Wees B. J.
  • 雑誌名: Physical Review B 巻: 103 ページ: pp.1-8
  • DOI: 10.1103/PhysRevB.103.214425
  • 査読あり / オープンアクセス / 国際共著
• [雑誌論文] Dynamic magnetoelastic boundary conditions and the pumping of phonons (2021)
  • 著者名/発表者名: Sato Takuma、Yu Weichao、Streib Simon、Bauer Gerrit E. W.
  • 雑誌名: Physical Review B 巻: 104 ページ: pp.1-15
  • DOI: 10.1103/PhysRevB.104.014403
  • 査読あり / オープンアクセス / 国際共著
• [雑誌論文] The 2021 Magnonics Roadmap (2021)
  • 著者名/発表者名: Anjan Barman, Gianluca Gubbiotti, S Ladak, A O Adeyeye, M Krawczyk, J Grafe, C Adelmann, S Cotofana, A Naeemi, V I Vasyuchka, B Hillebrands, S A Nikitov, H Yu, D Grundler, A V Sadovnikov, A A Grachev, S E Sheshukova, J Y Duquesne, M Marangolo, G Csaba, W Porod, V E Demidov, 他
  • 雑誌名: Journal of Physics: Condensed Matter 巻: 33 ページ: 413001～413001
  • DOI: 10.1088/1361-648X/abec1a
  • 査読あり / オープンアクセス / 国際共著
• [雑誌論文] Hopfield neural network in magnetic textures with intrinsic Hebbian learning (2021)
  • 著者名/発表者名: Yu Weichao、Xiao Jiang、Bauer Gerrit E. W.
  • 雑誌名: Physical Review B 巻: 104 ページ: pp.1-6
  • DOI: 10.1103/PhysRevB.104.L180405
  • 査読あり / オープンアクセス / 国際共著
• [雑誌論文] Imaging Spin‐Wave Damping Underneath Metals Using Electron Spins in Diamond (2021)
  • 著者名/発表者名: Bertelli Iacopo、Simon Brecht G.、Yu Tao、Aarts Jan、Bauer Gerrit E. W.、Blanter Yaroslav M.、van der Sar Toeno
  • 雑誌名: Advanced Quantum Technologies 巻: 4 ページ: 2100094～2100094
  • DOI: 10.1002/qute.202100094
  • 査読あり / オープンアクセス / 国際共著
• [雑誌論文] Seebeck effect in nanomagnets (2021)
  • 著者名/発表者名: Fedorov Dmitry V、Gradhand Martin、Tauber Katarina、Bauer Gerrit E W、Mertig Ingrid
  • 雑誌名: Journal of Physics: Condensed Matter 巻: 34 ページ: 085801～085801
  • DOI: 10.1088/1361-648X/ac3b26
  • 査読あり / オープンアクセス / 国際共著
• [学会発表] Magnons vs. Ferrons (2021)
  • 著者名/発表者名: G.E.W. Bauer
  • 学会等名: 82nd Autumn Meeting of the Japanese Society for Applied Physics
• [学会発表] Introduction to New Directions of Ferrimagnetic Spintronics (2021)
  • 著者名/発表者名: G.E.W. Bauer
  • 学会等名: JPS 2021 Autumn Meeting, The Physical Society of Japan
• [学会発表] Magnonics vs. Ferronics (2021)
  • 著者名/発表者名: G.E.W.Bauer
  • 学会等名: Joint Workshop between SUSTech & AIMR
  • 国際学会
• [学会発表] Magnons versus Ferrons (2021)
  • 著者名/発表者名: G.E.W.Bauer
  • 学会等名: APW-RIKEN-Tsinghua-Kavli workshop 2021 “Highlights on condensed matter physics”
  • 国際学会