Two distinct charge density waves in the quasi-one-dimensional metal Sr0.95NbO3.37 revealed by resonant soft X-ray scattering
Abstract The interplay of electron-electron and electron-lattice interactions plays an important role in determining exotic properties in strongly correlated electron systems. Of particular interest is quasi-one-dimensional SrNbO x metals, which are perovskite-related layered Carpy-Galy phases. Quas...
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Nature Portfolio
2024-05-01
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| Online Access: | https://doi.org/10.1038/s41427-024-00547-7 |
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| author | Angga Dito Fauzi Caozheng Diao Thomas J. Whitcher Frank Lichtenberg Ping Yang Mark B. H. Breese Andrivo Rusydi |
| author_facet | Angga Dito Fauzi Caozheng Diao Thomas J. Whitcher Frank Lichtenberg Ping Yang Mark B. H. Breese Andrivo Rusydi |
| author_sort | Angga Dito Fauzi |
| collection | DOAJ |
| description | Abstract The interplay of electron-electron and electron-lattice interactions plays an important role in determining exotic properties in strongly correlated electron systems. Of particular interest is quasi-one-dimensional SrNbO x metals, which are perovskite-related layered Carpy-Galy phases. Quasi-one-dimensional metals often exhibit a charge density wave (CDW) accompanied by lattice distortion; however, to date, the presence of a CDW in a quasi-one-dimensional metallic Carpy-Galy phase has not been detected. Here, we report the discovery of two distinct and simultaneous commensurate CDWs in Sr0.95NbO3.37 using resonant soft X-ray scattering (RSXS), namely, an electronic-(001) superlattice below ~ 200 K and an electronic-(002) Bragg peak. We also observe a non-electronic-(002) Bragg peak showing lattice distortion below ~ 150 K. Through the temperature dependence and resonance profile of these CDWs and the lattice distortion, as well as the relationship between the wavelength and charge density, these CDWs are determined to be Wigner crystals and Peierls-like instabilities, respectively. The electron‒electron interaction is strong and dominant even up to 350 K, and upon cooling, it drives the electron–lattice interaction. The correlation length of the electronic-(001) superlattice is surprisingly larger than that of the electronic-(002) Bragg peak, and the superlattice is highly anisotropic. Supported by theoretical calculations, the CDWs are determined by the charge anisotropy and redistribution between the O-2p and Nb-4d orbitals, and the strength of the electronic-(001) superlattice is within the strong coupling limit. |
| format | Article |
| id | doaj-art-e000aef0fead4bfcb009c6a05230ddf0 |
| institution | Kabale University |
| issn | 1884-4057 |
| language | English |
| publishDate | 2024-05-01 |
| publisher | Nature Portfolio |
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| series | NPG Asia Materials |
| spelling | doaj-art-e000aef0fead4bfcb009c6a05230ddf02025-01-19T12:28:36ZengNature PortfolioNPG Asia Materials1884-40572024-05-0116111310.1038/s41427-024-00547-7Two distinct charge density waves in the quasi-one-dimensional metal Sr0.95NbO3.37 revealed by resonant soft X-ray scatteringAngga Dito Fauzi0Caozheng Diao1Thomas J. Whitcher2Frank Lichtenberg3Ping Yang4Mark B. H. Breese5Andrivo Rusydi6Department of Physics, National University of SingaporeSingapore Synchrotron Light SourceDepartment of Physics, National University of SingaporeDepartment of Materials, ETH ZurichSingapore Synchrotron Light SourceDepartment of Physics, National University of SingaporeDepartment of Physics, National University of SingaporeAbstract The interplay of electron-electron and electron-lattice interactions plays an important role in determining exotic properties in strongly correlated electron systems. Of particular interest is quasi-one-dimensional SrNbO x metals, which are perovskite-related layered Carpy-Galy phases. Quasi-one-dimensional metals often exhibit a charge density wave (CDW) accompanied by lattice distortion; however, to date, the presence of a CDW in a quasi-one-dimensional metallic Carpy-Galy phase has not been detected. Here, we report the discovery of two distinct and simultaneous commensurate CDWs in Sr0.95NbO3.37 using resonant soft X-ray scattering (RSXS), namely, an electronic-(001) superlattice below ~ 200 K and an electronic-(002) Bragg peak. We also observe a non-electronic-(002) Bragg peak showing lattice distortion below ~ 150 K. Through the temperature dependence and resonance profile of these CDWs and the lattice distortion, as well as the relationship between the wavelength and charge density, these CDWs are determined to be Wigner crystals and Peierls-like instabilities, respectively. The electron‒electron interaction is strong and dominant even up to 350 K, and upon cooling, it drives the electron–lattice interaction. The correlation length of the electronic-(001) superlattice is surprisingly larger than that of the electronic-(002) Bragg peak, and the superlattice is highly anisotropic. Supported by theoretical calculations, the CDWs are determined by the charge anisotropy and redistribution between the O-2p and Nb-4d orbitals, and the strength of the electronic-(001) superlattice is within the strong coupling limit.https://doi.org/10.1038/s41427-024-00547-7 |
| spellingShingle | Angga Dito Fauzi Caozheng Diao Thomas J. Whitcher Frank Lichtenberg Ping Yang Mark B. H. Breese Andrivo Rusydi Two distinct charge density waves in the quasi-one-dimensional metal Sr0.95NbO3.37 revealed by resonant soft X-ray scattering NPG Asia Materials |
| title | Two distinct charge density waves in the quasi-one-dimensional metal Sr0.95NbO3.37 revealed by resonant soft X-ray scattering |
| title_full | Two distinct charge density waves in the quasi-one-dimensional metal Sr0.95NbO3.37 revealed by resonant soft X-ray scattering |
| title_fullStr | Two distinct charge density waves in the quasi-one-dimensional metal Sr0.95NbO3.37 revealed by resonant soft X-ray scattering |
| title_full_unstemmed | Two distinct charge density waves in the quasi-one-dimensional metal Sr0.95NbO3.37 revealed by resonant soft X-ray scattering |
| title_short | Two distinct charge density waves in the quasi-one-dimensional metal Sr0.95NbO3.37 revealed by resonant soft X-ray scattering |
| title_sort | two distinct charge density waves in the quasi one dimensional metal sr0 95nbo3 37 revealed by resonant soft x ray scattering |
| url | https://doi.org/10.1038/s41427-024-00547-7 |
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