Strong electron-phonon coupling driven pseudogap modulation and density-wave fluctuations in a correlated polar metal
Abstract There is tremendous interest in employing collective excitations of the lattice, spin, charge, and orbitals to tune strongly correlated electronic phenomena. We report such an effect in a ruthenate, Ca3Ru2O7, where two phonons with strong electron-phonon coupling modulate the electronic pse...
| Main Authors: | , , , , , , , , , , , , , , , |
|---|---|
| Format: | Article |
| Language: | English |
| Published: |
Nature Portfolio
2023-09-01
|
| Series: | Nature Communications |
| Online Access: | https://doi.org/10.1038/s41467-023-41460-x |
| _version_ | 1797558216432812032 |
|---|---|
| author | Huaiyu (Hugo) Wang Yihuang Xiong Hari Padma Yi Wang Ziqi Wang Romain Claes Guillaume Brunin Lujin Min Rui Zu Maxwell T. Wetherington Yu Wang Zhiqiang Mao Geoffroy Hautier Long-Qing Chen Ismaila Dabo Venkatraman Gopalan |
| author_facet | Huaiyu (Hugo) Wang Yihuang Xiong Hari Padma Yi Wang Ziqi Wang Romain Claes Guillaume Brunin Lujin Min Rui Zu Maxwell T. Wetherington Yu Wang Zhiqiang Mao Geoffroy Hautier Long-Qing Chen Ismaila Dabo Venkatraman Gopalan |
| author_sort | Huaiyu (Hugo) Wang |
| collection | DOAJ |
| description | Abstract There is tremendous interest in employing collective excitations of the lattice, spin, charge, and orbitals to tune strongly correlated electronic phenomena. We report such an effect in a ruthenate, Ca3Ru2O7, where two phonons with strong electron-phonon coupling modulate the electronic pseudogap as well as mediate charge and spin density wave fluctuations. Combining temperature-dependent Raman spectroscopy with density functional theory reveals two phonons, B 2 P and B 2 M, that are strongly coupled to electrons and whose scattering intensities respectively dominate in the pseudogap versus the metallic phases. The B 2 P squeezes the octahedra along the out of plane c-axis, while the B 2 M elongates it, thus modulating the Ru 4d orbital splitting and the bandwidth of the in-plane electron hopping; Thus, B 2 P opens the pseudogap, while B 2 M closes it. Moreover, the B 2 phonons mediate incoherent charge and spin density wave fluctuations, as evidenced by changes in the background electronic Raman scattering that exhibit unique symmetry signatures. The polar order breaks inversion symmetry, enabling infrared activity of these phonons, paving the way for coherent light-driven control of electronic transport. |
| first_indexed | 2024-03-10T17:27:14Z |
| format | Article |
| id | doaj.art-300e9d4c7b374552bd75e1fe5d3eb359 |
| institution | Directory Open Access Journal |
| issn | 2041-1723 |
| language | English |
| last_indexed | 2024-03-10T17:27:14Z |
| publishDate | 2023-09-01 |
| publisher | Nature Portfolio |
| record_format | Article |
| series | Nature Communications |
| spelling | doaj.art-300e9d4c7b374552bd75e1fe5d3eb3592023-11-20T10:07:26ZengNature PortfolioNature Communications2041-17232023-09-0114111010.1038/s41467-023-41460-xStrong electron-phonon coupling driven pseudogap modulation and density-wave fluctuations in a correlated polar metalHuaiyu (Hugo) Wang0Yihuang Xiong1Hari Padma2Yi Wang3Ziqi Wang4Romain Claes5Guillaume Brunin6Lujin Min7Rui Zu8Maxwell T. Wetherington9Yu Wang10Zhiqiang Mao11Geoffroy Hautier12Long-Qing Chen13Ismaila Dabo14Venkatraman Gopalan15Materials Research Institute and Department of Material Science & Engineering, Pennsylvania State UniversityMaterials Research Institute and Department of Material Science & Engineering, Pennsylvania State UniversityMaterials Research Institute and Department of Material Science & Engineering, Pennsylvania State UniversityMaterials Research Institute and Department of Material Science & Engineering, Pennsylvania State UniversityMaterials Research Institute and Department of Material Science & Engineering, Pennsylvania State UniversityInstitute of Condensed Matter and Nanosciences (IMCN), Université catholique de Louvain, Chemin des Étoiles 8MatgenixMaterials Research Institute and Department of Material Science & Engineering, Pennsylvania State UniversityMaterials Research Institute and Department of Material Science & Engineering, Pennsylvania State UniversityMaterials Research Institute and Department of Material Science & Engineering, Pennsylvania State University2D Crystal Consortium, Material Research Institute, Pennsylvania State University2D Crystal Consortium, Material Research Institute, Pennsylvania State UniversityThayer School of Engineering, Dartmouth College, 14 Engineering DriveMaterials Research Institute and Department of Material Science & Engineering, Pennsylvania State UniversityMaterials Research Institute and Department of Material Science & Engineering, Pennsylvania State UniversityMaterials Research Institute and Department of Material Science & Engineering, Pennsylvania State UniversityAbstract There is tremendous interest in employing collective excitations of the lattice, spin, charge, and orbitals to tune strongly correlated electronic phenomena. We report such an effect in a ruthenate, Ca3Ru2O7, where two phonons with strong electron-phonon coupling modulate the electronic pseudogap as well as mediate charge and spin density wave fluctuations. Combining temperature-dependent Raman spectroscopy with density functional theory reveals two phonons, B 2 P and B 2 M, that are strongly coupled to electrons and whose scattering intensities respectively dominate in the pseudogap versus the metallic phases. The B 2 P squeezes the octahedra along the out of plane c-axis, while the B 2 M elongates it, thus modulating the Ru 4d orbital splitting and the bandwidth of the in-plane electron hopping; Thus, B 2 P opens the pseudogap, while B 2 M closes it. Moreover, the B 2 phonons mediate incoherent charge and spin density wave fluctuations, as evidenced by changes in the background electronic Raman scattering that exhibit unique symmetry signatures. The polar order breaks inversion symmetry, enabling infrared activity of these phonons, paving the way for coherent light-driven control of electronic transport.https://doi.org/10.1038/s41467-023-41460-x |
| spellingShingle | Huaiyu (Hugo) Wang Yihuang Xiong Hari Padma Yi Wang Ziqi Wang Romain Claes Guillaume Brunin Lujin Min Rui Zu Maxwell T. Wetherington Yu Wang Zhiqiang Mao Geoffroy Hautier Long-Qing Chen Ismaila Dabo Venkatraman Gopalan Strong electron-phonon coupling driven pseudogap modulation and density-wave fluctuations in a correlated polar metal Nature Communications |
| title | Strong electron-phonon coupling driven pseudogap modulation and density-wave fluctuations in a correlated polar metal |
| title_full | Strong electron-phonon coupling driven pseudogap modulation and density-wave fluctuations in a correlated polar metal |
| title_fullStr | Strong electron-phonon coupling driven pseudogap modulation and density-wave fluctuations in a correlated polar metal |
| title_full_unstemmed | Strong electron-phonon coupling driven pseudogap modulation and density-wave fluctuations in a correlated polar metal |
| title_short | Strong electron-phonon coupling driven pseudogap modulation and density-wave fluctuations in a correlated polar metal |
| title_sort | strong electron phonon coupling driven pseudogap modulation and density wave fluctuations in a correlated polar metal |
| url | https://doi.org/10.1038/s41467-023-41460-x |
| work_keys_str_mv | AT huaiyuhugowang strongelectronphononcouplingdrivenpseudogapmodulationanddensitywavefluctuationsinacorrelatedpolarmetal AT yihuangxiong strongelectronphononcouplingdrivenpseudogapmodulationanddensitywavefluctuationsinacorrelatedpolarmetal AT haripadma strongelectronphononcouplingdrivenpseudogapmodulationanddensitywavefluctuationsinacorrelatedpolarmetal AT yiwang strongelectronphononcouplingdrivenpseudogapmodulationanddensitywavefluctuationsinacorrelatedpolarmetal AT ziqiwang strongelectronphononcouplingdrivenpseudogapmodulationanddensitywavefluctuationsinacorrelatedpolarmetal AT romainclaes strongelectronphononcouplingdrivenpseudogapmodulationanddensitywavefluctuationsinacorrelatedpolarmetal AT guillaumebrunin strongelectronphononcouplingdrivenpseudogapmodulationanddensitywavefluctuationsinacorrelatedpolarmetal AT lujinmin strongelectronphononcouplingdrivenpseudogapmodulationanddensitywavefluctuationsinacorrelatedpolarmetal AT ruizu strongelectronphononcouplingdrivenpseudogapmodulationanddensitywavefluctuationsinacorrelatedpolarmetal AT maxwelltwetherington strongelectronphononcouplingdrivenpseudogapmodulationanddensitywavefluctuationsinacorrelatedpolarmetal AT yuwang strongelectronphononcouplingdrivenpseudogapmodulationanddensitywavefluctuationsinacorrelatedpolarmetal AT zhiqiangmao strongelectronphononcouplingdrivenpseudogapmodulationanddensitywavefluctuationsinacorrelatedpolarmetal AT geoffroyhautier strongelectronphononcouplingdrivenpseudogapmodulationanddensitywavefluctuationsinacorrelatedpolarmetal AT longqingchen strongelectronphononcouplingdrivenpseudogapmodulationanddensitywavefluctuationsinacorrelatedpolarmetal AT ismailadabo strongelectronphononcouplingdrivenpseudogapmodulationanddensitywavefluctuationsinacorrelatedpolarmetal AT venkatramangopalan strongelectronphononcouplingdrivenpseudogapmodulationanddensitywavefluctuationsinacorrelatedpolarmetal |