Electron-phonon origins of unconventional resistivity in moderately correlated perovskite oxides
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| Format: | Preprint |
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2025
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| _version_ | 1866918422115254272 |
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| author | Coulter, Jennifer Kugler, Fabian B. LaBollita, Harrison Georges, Antoine Dreyer, Cyrus E. |
| author_facet | Coulter, Jennifer Kugler, Fabian B. LaBollita, Harrison Georges, Antoine Dreyer, Cyrus E. |
| contents | Transition-metal perovskite oxides exhibit moderately correlated metallic phases, several of which exhibit a $T^2$ resistivity scaling up to temperatures far exceeding the regime where Fermi-liquid electron-electron scattering is expected to dominate. Some of these materials, such as SrMoO$_3$, also exhibit unexplained ultra-low room-temperature resistivity. We demonstrate that in SrMoO$_3$, SrWO$_3$, SrTaO$_3$, SrNbO$_3$, and SrVO$_3$ electron-phonon scattering results in quadratic-scaling resistivity due to the shape of the Fermi surface and the thermal activation of optical phonons. We also reveal that the origin of the low resistivity of SrMoO$_3$ is an overall low electron-phonon coupling strength, and identify SrWO$_3$ and SrTaO$_3$ as other possible low-resistivity oxides. Additionally, we find that the strength of electron-phonon coupling is sensitive to structural distortions, energies of optical phonons, and the treatment of electronic correlations. This suggests design principles for finding other ultra-high conductivity transition-metal oxides, and has significant implications for theoretical interpretation of direct-current resistivity in transition-metal oxides and beyond. |
| format | Preprint |
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arxiv_https___arxiv_org_abs_2506_10143 |
| institution | arXiv |
| publishDate | 2025 |
| record_format | arxiv |
| spellingShingle | Electron-phonon origins of unconventional resistivity in moderately correlated perovskite oxides Coulter, Jennifer Kugler, Fabian B. LaBollita, Harrison Georges, Antoine Dreyer, Cyrus E. Materials Science Strongly Correlated Electrons Transition-metal perovskite oxides exhibit moderately correlated metallic phases, several of which exhibit a $T^2$ resistivity scaling up to temperatures far exceeding the regime where Fermi-liquid electron-electron scattering is expected to dominate. Some of these materials, such as SrMoO$_3$, also exhibit unexplained ultra-low room-temperature resistivity. We demonstrate that in SrMoO$_3$, SrWO$_3$, SrTaO$_3$, SrNbO$_3$, and SrVO$_3$ electron-phonon scattering results in quadratic-scaling resistivity due to the shape of the Fermi surface and the thermal activation of optical phonons. We also reveal that the origin of the low resistivity of SrMoO$_3$ is an overall low electron-phonon coupling strength, and identify SrWO$_3$ and SrTaO$_3$ as other possible low-resistivity oxides. Additionally, we find that the strength of electron-phonon coupling is sensitive to structural distortions, energies of optical phonons, and the treatment of electronic correlations. This suggests design principles for finding other ultra-high conductivity transition-metal oxides, and has significant implications for theoretical interpretation of direct-current resistivity in transition-metal oxides and beyond. |
| title | Electron-phonon origins of unconventional resistivity in moderately correlated perovskite oxides |
| topic | Materials Science Strongly Correlated Electrons |
| url | https://arxiv.org/abs/2506.10143 |