Signature of spin-phonon coupling driven charge density wave in a kagome magnet
Abstract The intertwining between spin, charge, and lattice degrees of freedom can give rise to unusual macroscopic quantum states, including high-temperature superconductivity and quantum anomalous Hall effects. Recently, a charge density wave (CDW) has been observed in the kagome antiferromagnet F...
| Main Authors: | , , , , , , , , , , , , , , , , |
|---|---|
| Format: | Article |
| Language: | English |
| Published: |
Nature Portfolio
2023-10-01
|
| Series: | Nature Communications |
| Online Access: | https://doi.org/10.1038/s41467-023-41957-5 |
| _version_ | 1797558674844024832 |
|---|---|
| author | H. Miao T. T. Zhang H. X. Li G. Fabbris A. H. Said R. Tartaglia T. Yilmaz E. Vescovo J.-X. Yin S. Murakami X. L. Feng K. Jiang X. L. Wu A. F. Wang S. Okamoto Y. L. Wang H. N. Lee |
| author_facet | H. Miao T. T. Zhang H. X. Li G. Fabbris A. H. Said R. Tartaglia T. Yilmaz E. Vescovo J.-X. Yin S. Murakami X. L. Feng K. Jiang X. L. Wu A. F. Wang S. Okamoto Y. L. Wang H. N. Lee |
| author_sort | H. Miao |
| collection | DOAJ |
| description | Abstract The intertwining between spin, charge, and lattice degrees of freedom can give rise to unusual macroscopic quantum states, including high-temperature superconductivity and quantum anomalous Hall effects. Recently, a charge density wave (CDW) has been observed in the kagome antiferromagnet FeGe, indicative of possible intertwining physics. An outstanding question is that whether magnetic correlation is fundamental for the spontaneous spatial symmetry breaking orders. Here, utilizing elastic and high-resolution inelastic x-ray scattering, we observe a c-axis superlattice vector that coexists with the 2 $$\times$$ × 2 $$\times$$ × 1 CDW vectors in the kagome plane. Most interestingly, between the magnetic and CDW transition temperatures, the phonon dynamical structure factor shows a giant phonon-energy hardening and a substantial phonon linewidth broadening near the c-axis wavevectors, both signaling the spin-phonon coupling. By first principles and model calculations, we show that both the static spin polarization and dynamic spin excitations intertwine with the phonon to drive the spatial symmetry breaking in FeGe. |
| first_indexed | 2024-03-10T17:33:50Z |
| format | Article |
| id | doaj.art-ab0920be849744df927e512ee76d3612 |
| institution | Directory Open Access Journal |
| issn | 2041-1723 |
| language | English |
| last_indexed | 2024-03-10T17:33:50Z |
| publishDate | 2023-10-01 |
| publisher | Nature Portfolio |
| record_format | Article |
| series | Nature Communications |
| spelling | doaj.art-ab0920be849744df927e512ee76d36122023-11-20T09:55:04ZengNature PortfolioNature Communications2041-17232023-10-011411810.1038/s41467-023-41957-5Signature of spin-phonon coupling driven charge density wave in a kagome magnetH. Miao0T. T. Zhang1H. X. Li2G. Fabbris3A. H. Said4R. Tartaglia5T. Yilmaz6E. Vescovo7J.-X. Yin8S. Murakami9X. L. Feng10K. Jiang11X. L. Wu12A. F. Wang13S. Okamoto14Y. L. Wang15H. N. Lee16Materials Science and Technology Division, Oak Ridge National LaboratoryDepartment of Physics, Tokyo Institute of Technology, OkayamaMaterials Science and Technology Division, Oak Ridge National LaboratoryAdvanced Photon Source, Argonne National LaboratoryAdvanced Photon Source, Argonne National LaboratoryAdvanced Photon Source, Argonne National LaboratoryNational Synchrotron Light Source II, Brookhaven National Laboratory, UptonNational Synchrotron Light Source II, Brookhaven National Laboratory, UptonLaboratory for Quantum Emergence, Department of Physics, Southern University of Science and TechnologyDepartment of Physics, Tokyo Institute of Technology, OkayamaBeijing National Laboratory for Condensed Matter Physics, and Institute of Physics, Chinese Academy of SciencesBeijing National Laboratory for Condensed Matter Physics, and Institute of Physics, Chinese Academy of SciencesLow Temperature Physics Laboratory, College of Physics and Center of Quantum Materials and Devices, Chongqing UniversityLow Temperature Physics Laboratory, College of Physics and Center of Quantum Materials and Devices, Chongqing UniversityMaterials Science and Technology Division, Oak Ridge National LaboratorySchool of Emerging Technology, University of Science and Technology of ChinaMaterials Science and Technology Division, Oak Ridge National LaboratoryAbstract The intertwining between spin, charge, and lattice degrees of freedom can give rise to unusual macroscopic quantum states, including high-temperature superconductivity and quantum anomalous Hall effects. Recently, a charge density wave (CDW) has been observed in the kagome antiferromagnet FeGe, indicative of possible intertwining physics. An outstanding question is that whether magnetic correlation is fundamental for the spontaneous spatial symmetry breaking orders. Here, utilizing elastic and high-resolution inelastic x-ray scattering, we observe a c-axis superlattice vector that coexists with the 2 $$\times$$ × 2 $$\times$$ × 1 CDW vectors in the kagome plane. Most interestingly, between the magnetic and CDW transition temperatures, the phonon dynamical structure factor shows a giant phonon-energy hardening and a substantial phonon linewidth broadening near the c-axis wavevectors, both signaling the spin-phonon coupling. By first principles and model calculations, we show that both the static spin polarization and dynamic spin excitations intertwine with the phonon to drive the spatial symmetry breaking in FeGe.https://doi.org/10.1038/s41467-023-41957-5 |
| spellingShingle | H. Miao T. T. Zhang H. X. Li G. Fabbris A. H. Said R. Tartaglia T. Yilmaz E. Vescovo J.-X. Yin S. Murakami X. L. Feng K. Jiang X. L. Wu A. F. Wang S. Okamoto Y. L. Wang H. N. Lee Signature of spin-phonon coupling driven charge density wave in a kagome magnet Nature Communications |
| title | Signature of spin-phonon coupling driven charge density wave in a kagome magnet |
| title_full | Signature of spin-phonon coupling driven charge density wave in a kagome magnet |
| title_fullStr | Signature of spin-phonon coupling driven charge density wave in a kagome magnet |
| title_full_unstemmed | Signature of spin-phonon coupling driven charge density wave in a kagome magnet |
| title_short | Signature of spin-phonon coupling driven charge density wave in a kagome magnet |
| title_sort | signature of spin phonon coupling driven charge density wave in a kagome magnet |
| url | https://doi.org/10.1038/s41467-023-41957-5 |
| work_keys_str_mv | AT hmiao signatureofspinphononcouplingdrivenchargedensitywaveinakagomemagnet AT ttzhang signatureofspinphononcouplingdrivenchargedensitywaveinakagomemagnet AT hxli signatureofspinphononcouplingdrivenchargedensitywaveinakagomemagnet AT gfabbris signatureofspinphononcouplingdrivenchargedensitywaveinakagomemagnet AT ahsaid signatureofspinphononcouplingdrivenchargedensitywaveinakagomemagnet AT rtartaglia signatureofspinphononcouplingdrivenchargedensitywaveinakagomemagnet AT tyilmaz signatureofspinphononcouplingdrivenchargedensitywaveinakagomemagnet AT evescovo signatureofspinphononcouplingdrivenchargedensitywaveinakagomemagnet AT jxyin signatureofspinphononcouplingdrivenchargedensitywaveinakagomemagnet AT smurakami signatureofspinphononcouplingdrivenchargedensitywaveinakagomemagnet AT xlfeng signatureofspinphononcouplingdrivenchargedensitywaveinakagomemagnet AT kjiang signatureofspinphononcouplingdrivenchargedensitywaveinakagomemagnet AT xlwu signatureofspinphononcouplingdrivenchargedensitywaveinakagomemagnet AT afwang signatureofspinphononcouplingdrivenchargedensitywaveinakagomemagnet AT sokamoto signatureofspinphononcouplingdrivenchargedensitywaveinakagomemagnet AT ylwang signatureofspinphononcouplingdrivenchargedensitywaveinakagomemagnet AT hnlee signatureofspinphononcouplingdrivenchargedensitywaveinakagomemagnet |