Ultrahigh room-temperature hole conductivity in a perovskite cuprate with vanishing electron-correlation
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arXiv
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| Main Authors: | , , , , , , , , , , , , , , , , , , , , , |
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| Format: | Preprint |
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2025
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| _version_ | 1866909573657395200 |
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| author | Wang, Meng Zhang, Jianbing Si, Liang Wu, Sijie Li, Caiyong Wu, Wenfeng Zhang, Xiaodong Li, Cong Wang, Lu Li, Fachao Wen, Lingzhi Liu, Yang Zhou, Jinling Sawada, Masahiro Lu, Nianpeng He, Qing Gao, Peng Liang, Tian Zhou, Shuyun Wang, Yeliang Kagawa, Fumitaka Yu, Pu |
| author_facet | Wang, Meng Zhang, Jianbing Si, Liang Wu, Sijie Li, Caiyong Wu, Wenfeng Zhang, Xiaodong Li, Cong Wang, Lu Li, Fachao Wen, Lingzhi Liu, Yang Zhou, Jinling Sawada, Masahiro Lu, Nianpeng He, Qing Gao, Peng Liang, Tian Zhou, Shuyun Wang, Yeliang Kagawa, Fumitaka Yu, Pu |
| contents | Electron-correlated two-dimensional (2D) cuprates have been extensively studied since the discovery of high-Tc superconductivity, in contrast, the three-dimensional (3D) counterpart perovskite cuprates remain largely unexplored due to their chemical instability and synthesis challenges. Herein, we develop an efficient two-step approach that combines symmetry-selective growth and topotactic oxidization to synthesize high-quality perovskite LaCuO3 films, and furthermore reveal its exotic electronic states. The compressively strained LaCuO3 films exhibit an unexpected ultrahigh p-type conductivity of ~1.5*10^5 S/cm with a hole mobility of ~30 cm2 V-1 s-1 at room-temperature. X-ray absorption spectra and first-principles calculations unveil a ligand-hole state of p-d hybridization with degenerate eg orbitals and light effective mass, indicating nearly-vanishing electron-correlation. These features contrast sharply with 2D cuprates and offer physical insights into the design of high-performance electronic devices. |
| format | Preprint |
| id |
arxiv_https___arxiv_org_abs_2504_07369 |
| institution | arXiv |
| publishDate | 2025 |
| record_format | arxiv |
| spellingShingle | Ultrahigh room-temperature hole conductivity in a perovskite cuprate with vanishing electron-correlation Wang, Meng Zhang, Jianbing Si, Liang Wu, Sijie Li, Caiyong Wu, Wenfeng Zhang, Xiaodong Li, Cong Wang, Lu Li, Fachao Wen, Lingzhi Liu, Yang Zhou, Jinling Sawada, Masahiro Lu, Nianpeng He, Qing Gao, Peng Liang, Tian Zhou, Shuyun Wang, Yeliang Kagawa, Fumitaka Yu, Pu Strongly Correlated Electrons Electron-correlated two-dimensional (2D) cuprates have been extensively studied since the discovery of high-Tc superconductivity, in contrast, the three-dimensional (3D) counterpart perovskite cuprates remain largely unexplored due to their chemical instability and synthesis challenges. Herein, we develop an efficient two-step approach that combines symmetry-selective growth and topotactic oxidization to synthesize high-quality perovskite LaCuO3 films, and furthermore reveal its exotic electronic states. The compressively strained LaCuO3 films exhibit an unexpected ultrahigh p-type conductivity of ~1.5*10^5 S/cm with a hole mobility of ~30 cm2 V-1 s-1 at room-temperature. X-ray absorption spectra and first-principles calculations unveil a ligand-hole state of p-d hybridization with degenerate eg orbitals and light effective mass, indicating nearly-vanishing electron-correlation. These features contrast sharply with 2D cuprates and offer physical insights into the design of high-performance electronic devices. |
| title | Ultrahigh room-temperature hole conductivity in a perovskite cuprate with vanishing electron-correlation |
| topic | Strongly Correlated Electrons |
| url | https://arxiv.org/abs/2504.07369 |