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| Main Authors: | , , , , , , , , , , , , , , , , |
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| Format: | Preprint |
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2025
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| Subjects: | |
| Online Access: | https://arxiv.org/abs/2512.11439 |
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| _version_ | 1866912759869865984 |
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| author | Zhao, Jinyu Cai, Shu Liu, Zhaoyu Zhang, Jianfeng Sun, Shuaihang Wang, Pengyu Guo, Jing Zhou, Yazhou Li, Shiliang Liu, Fuyang Wang, Luhong Liu, Haozhe Ding, Yang Wu, Qi Greene, Richard L. Xiang, Tao Sun, Liling |
| author_facet | Zhao, Jinyu Cai, Shu Liu, Zhaoyu Zhang, Jianfeng Sun, Shuaihang Wang, Pengyu Guo, Jing Zhou, Yazhou Li, Shiliang Liu, Fuyang Wang, Luhong Liu, Haozhe Ding, Yang Wu, Qi Greene, Richard L. Xiang, Tao Sun, Liling |
| contents | It is well known that the electronic structure of hole-doped cuprate superconductors is tunable through both chemical doping and external pressure, which frequently offer us new insights of understanding on the high-Tc superconducting mechanism. While, for electron-doped cuprate superconductors, although the chemical doping effects have been systematically and thoroughly investigated, there is still a notable lack of experimental evidence regarding the pressure-driven coevolution of Tc and electronic structure. In this study, we report the first observation on the signatures of pressure-induced Lifshitz transition in Pr0.87LaCe0.13CuO4+delta (PLCCO) single crystal, a typical electron-doped cuprate superconductor, through the comprehensive high-pressure measurements of electrical resistance, Hall coefficient (RH) and synchrotron X-ray diffraction (XRD). Our results reveal that, at 40 K, the ambient-pressure RH with a significantly negative value decreases with increasing pressure until it reaches zero at a critical pressure (Pc ~ 10 GPa). Meanwhile, the corresponding Tc exhibits a slight variation within this pressure range. As pressure is further increased beyond Pc, RH changes its sign from negative to positive and then shows a slight increase, while Tc displays a continuous decrease. Our XRD measurements at 40 K demonstrate that no crystal structure phase transition occurs across the Pc. These results reveal that applying pressure to PLCCO can induce a Lifshitz transition at Pc, manifesting the reconstruction of the Fermi surface (FS), which turns the superconductivity toward fading out. Our calculation further reinforces the Fermi surface reconstruction from electron-dominated to hole-dominated ones at around Pc. These findings provide new evidence that highlights the strong correlation between the superconductivity and the Fermi surface topology in the electron-doped cuprates. |
| format | Preprint |
| id |
arxiv_https___arxiv_org_abs_2512_11439 |
| institution | arXiv |
| publishDate | 2025 |
| record_format | arxiv |
| spellingShingle | Signatures of a Lifshitz transition in pressurized electron-doped cuprate Zhao, Jinyu Cai, Shu Liu, Zhaoyu Zhang, Jianfeng Sun, Shuaihang Wang, Pengyu Guo, Jing Zhou, Yazhou Li, Shiliang Liu, Fuyang Wang, Luhong Liu, Haozhe Ding, Yang Wu, Qi Greene, Richard L. Xiang, Tao Sun, Liling Superconductivity Materials Science It is well known that the electronic structure of hole-doped cuprate superconductors is tunable through both chemical doping and external pressure, which frequently offer us new insights of understanding on the high-Tc superconducting mechanism. While, for electron-doped cuprate superconductors, although the chemical doping effects have been systematically and thoroughly investigated, there is still a notable lack of experimental evidence regarding the pressure-driven coevolution of Tc and electronic structure. In this study, we report the first observation on the signatures of pressure-induced Lifshitz transition in Pr0.87LaCe0.13CuO4+delta (PLCCO) single crystal, a typical electron-doped cuprate superconductor, through the comprehensive high-pressure measurements of electrical resistance, Hall coefficient (RH) and synchrotron X-ray diffraction (XRD). Our results reveal that, at 40 K, the ambient-pressure RH with a significantly negative value decreases with increasing pressure until it reaches zero at a critical pressure (Pc ~ 10 GPa). Meanwhile, the corresponding Tc exhibits a slight variation within this pressure range. As pressure is further increased beyond Pc, RH changes its sign from negative to positive and then shows a slight increase, while Tc displays a continuous decrease. Our XRD measurements at 40 K demonstrate that no crystal structure phase transition occurs across the Pc. These results reveal that applying pressure to PLCCO can induce a Lifshitz transition at Pc, manifesting the reconstruction of the Fermi surface (FS), which turns the superconductivity toward fading out. Our calculation further reinforces the Fermi surface reconstruction from electron-dominated to hole-dominated ones at around Pc. These findings provide new evidence that highlights the strong correlation between the superconductivity and the Fermi surface topology in the electron-doped cuprates. |
| title | Signatures of a Lifshitz transition in pressurized electron-doped cuprate |
| topic | Superconductivity Materials Science |
| url | https://arxiv.org/abs/2512.11439 |