Mass enhancement and metal-nonmetal transition driven by d-f hybridization in perovskites La1-xPrxCuO3
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| Main Authors: | , , , , , , , , |
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| Format: | Preprint |
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2025
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| _version_ | 1866909519676702720 |
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| author | Takahashi, H. Ito, M. Fujioka, J. Ochi, M. Sakai, S. Arita, R. Sagayama, H. Yamasaki, Y. Ishiwata, S. |
| author_facet | Takahashi, H. Ito, M. Fujioka, J. Ochi, M. Sakai, S. Arita, R. Sagayama, H. Yamasaki, Y. Ishiwata, S. |
| contents | We report the large electron-mass enhancement and the metal to nonmetal transition upon the Pr doping in perovskite-type La1-xPrxCuO3. With increasing the Pr content x around 0.6, the LaCuO3-type three-dimensional structure with trivalent Cu ions changes to the quasi-one-dimensional structure with nearly divalent Cu ions, which accompanies significant changes in the electronic properties. Based on the resistivity, optical conductivity, specific heat measurements and the first-principles calculations, we discuss the formation of a nearly localized nonmetallic state stabilized by the hybridization between Cu 3d, O 2p, and Pr 4f orbitals in the quasi-one-dimensional lattice. The present perovskite-type cuprates offer a unique opportunity to explore novel quantum phases of correlated electrons in low-dimensional lattice, where the spin/charge/orbital degrees of freedom of A- and B-site ions are entangled. |
| format | Preprint |
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arxiv_https___arxiv_org_abs_2502_15238 |
| institution | arXiv |
| publishDate | 2025 |
| record_format | arxiv |
| spellingShingle | Mass enhancement and metal-nonmetal transition driven by d-f hybridization in perovskites La1-xPrxCuO3 Takahashi, H. Ito, M. Fujioka, J. Ochi, M. Sakai, S. Arita, R. Sagayama, H. Yamasaki, Y. Ishiwata, S. Strongly Correlated Electrons We report the large electron-mass enhancement and the metal to nonmetal transition upon the Pr doping in perovskite-type La1-xPrxCuO3. With increasing the Pr content x around 0.6, the LaCuO3-type three-dimensional structure with trivalent Cu ions changes to the quasi-one-dimensional structure with nearly divalent Cu ions, which accompanies significant changes in the electronic properties. Based on the resistivity, optical conductivity, specific heat measurements and the first-principles calculations, we discuss the formation of a nearly localized nonmetallic state stabilized by the hybridization between Cu 3d, O 2p, and Pr 4f orbitals in the quasi-one-dimensional lattice. The present perovskite-type cuprates offer a unique opportunity to explore novel quantum phases of correlated electrons in low-dimensional lattice, where the spin/charge/orbital degrees of freedom of A- and B-site ions are entangled. |
| title | Mass enhancement and metal-nonmetal transition driven by d-f hybridization in perovskites La1-xPrxCuO3 |
| topic | Strongly Correlated Electrons |
| url | https://arxiv.org/abs/2502.15238 |