دورية أكاديمية
Giant chiral magnetoelectric oscillations in a van der Waals multiferroic.
العنوان: | Giant chiral magnetoelectric oscillations in a van der Waals multiferroic. |
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المؤلفون: | Gao FY; Department of Physics and Center for Complex Quantum Systems, The University of Texas at Austin, Austin, TX, USA., Peng X; Department of Physics and Center for Complex Quantum Systems, The University of Texas at Austin, Austin, TX, USA., Cheng X; Max Planck Institute for the Structure and Dynamics of Matter, Hamburg, Germany., Viñas Boström E; Max Planck Institute for the Structure and Dynamics of Matter, Hamburg, Germany.; Nano-Bio Spectroscopy Group, Departamento de Física de Materiales, Universidad del País Vasco, San Sebastián, Spain., Kim DS; Department of Physics and Center for Complex Quantum Systems, The University of Texas at Austin, Austin, TX, USA., Jain RK; Institute of Physics, Academia Sinica, Taipei, Taiwan., Vishnu D; Institute of Physics, Academia Sinica, Taipei, Taiwan.; Department of Chemistry, National Tsing Hua University, Hsinchu, Taiwan., Raju K; Institute of Physics, Academia Sinica, Taipei, Taiwan., Sankar R; Institute of Physics, Academia Sinica, Taipei, Taiwan., Lee SF; Institute of Physics, Academia Sinica, Taipei, Taiwan., Sentef MA; Max Planck Institute for the Structure and Dynamics of Matter, Hamburg, Germany.; Institute for Theoretical Physics and Bremen Center for Computational Materials Science, University of Bremen, Bremen, Germany., Kurumaji T; Division of Physics, Mathematics and Astronomy, California Institute of Technology, Pasadena, CA, USA., Li X; Department of Physics and Center for Complex Quantum Systems, The University of Texas at Austin, Austin, TX, USA., Tang P; Max Planck Institute for the Structure and Dynamics of Matter, Hamburg, Germany., Rubio A; Max Planck Institute for the Structure and Dynamics of Matter, Hamburg, Germany. angel.rubio@mpsd.mpg.de.; Nano-Bio Spectroscopy Group, Departamento de Física de Materiales, Universidad del País Vasco, San Sebastián, Spain. angel.rubio@mpsd.mpg.de.; Center for Computational Quantum Physics, The Flatiron Institute, New York, NY, USA. angel.rubio@mpsd.mpg.de., Baldini E; Department of Physics and Center for Complex Quantum Systems, The University of Texas at Austin, Austin, TX, USA. edoardo.baldini@austin.utexas.edu. |
المصدر: | Nature [Nature] 2024 Aug; Vol. 632 (8024), pp. 273-279. Date of Electronic Publication: 2024 Jul 17. |
نوع المنشور: | Journal Article |
اللغة: | English |
بيانات الدورية: | Publisher: Nature Publishing Group Country of Publication: England NLM ID: 0410462 Publication Model: Print-Electronic Cited Medium: Internet ISSN: 1476-4687 (Electronic) Linking ISSN: 00280836 NLM ISO Abbreviation: Nature Subsets: PubMed not MEDLINE; MEDLINE |
أسماء مطبوعة: | Publication: Basingstoke : Nature Publishing Group Original Publication: London, Macmillan Journals ltd. |
مستخلص: | Helical spin structures are expressions of magnetically induced chirality, entangling the dipolar and magnetic orders in materials 1-4 . The recent discovery of helical van der Waals multiferroics down to the ultrathin limit raises prospects of large chiral magnetoelectric correlations in two dimensions 5,6 . However, the exact nature and magnitude of these couplings have remained unknown so far. Here we perform a precision measurement of the dynamical magnetoelectric coupling for an enantiopure domain in an exfoliated van der Waals multiferroic. We evaluate this interaction in resonance with a collective electromagnon mode, capturing the impact of its oscillations on the dipolar and magnetic orders of the material with a suite of ultrafast optical probes. Our data show a giant natural optical activity at terahertz frequencies, characterized by quadrature modulations between the electric polarization and magnetization components. First-principles calculations further show that these chiral couplings originate from the synergy between the non-collinear spin texture and relativistic spin-orbit interactions, resulting in substantial enhancements over lattice-mediated effects. Our findings highlight the potential for intertwined orders to enable unique functionalities in the two-dimensional limit and pave the way for the development of van der Waals magnetoelectric devices operating at terahertz speeds. (© 2024. The Author(s).) |
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تواريخ الأحداث: | Date Created: 20240717 Date Completed: 20240807 Latest Revision: 20240810 |
رمز التحديث: | 20240812 |
مُعرف محوري في PubMed: | PMC11306099 |
DOI: | 10.1038/s41586-024-07678-5 |
PMID: | 39020169 |
قاعدة البيانات: | MEDLINE |
تدمد: | 1476-4687 |
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DOI: | 10.1038/s41586-024-07678-5 |