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题目（Title）：
Superconductivity in pressurized trilayer nickelate single crystals
主讲人（Speaker）：
朱英浩
开始时间（Start Time）：
2025-02-14 15:00
结束时间（End Time）：
2025-02-14 16:30
报告地点（Place）：
物质学院5-103教室
主办单位（Organization）：
物质科学与技术学院
协办单位(Co-organizer)：
简介（Brief Introduction）：
报告人简介：
Yinghao Zhu got his Ph.D. in applied physics and materials engineering from the University of Macau in 2022. Since then, he has been doing his postdoctoral research in the Department of Physics at Fudan University. Starting in Mar. 2025, he will join the Heinz Maier-Leibnitz Zentrum (MLZ), a collaborative neutron facility between Forschungszentrum Jülich (FZJ) and Technische Universität München (TUM), for postdoctoral research, funded by the Marie Skłodowska-Curie Scholars Program. His research primarily focuses on single crystal growth of correlated electron systems, magnetism, transport and thermodynamic characterization, and the use of neutron scattering techniques to study phase transitions and spin dynamics.
讲座摘要：
The search for new high-temperature superconductors beyond the copper-based paradigm offers exciting opportunities to deepen our understanding of superconductivity mechanisms and explore new applications. In this talk, I will present our successful synthesis of high-quality trilayer nickelate La4Ni3O10-δ single crystals with minimal oxygen deficiency, achieved through the high-pressure optical floating zone technique. Our results show that applying pressure effectively suppresses spin and charge order in La4Ni3O10-δ, leading to the emergence of superconductivity with a maximum Tc of around 30 K at 69.0 Gpa [1]. Susceptibility measurements reveal a strong diamagnetic response below Tc, confirming bulk superconductivity. In the normal state, we observe 'strange metal' behavior, marked by linear temperature-dependent resistance up to 300 K. This system's layer-dependent superconductivity suggests a distinct interlayer coupling mechanism, distinct from cuprates. Recently, we have also observed pressurized bulk superconductivity in Pr4Ni3O10 single crystals [2]. These findings offer insights into the superconducting mechanisms and introduce a new material platform to study the interplay between various electronic phenomena, including spin/charge order, flat band structure, interlayer coupling, strange metal behavior and superconductivity.
References
[1] Nature 631, 531-536 (2024), superconductivity in pressurized trilayer La4Ni3O10-δ single crystals.
[2] arXiv: 2501.17709v1 (2025), bulk superconductivity in pressurized trilayer nickelate Pr4Ni3O10 single crystals
邀请人：邓昊
Yinghao Zhu got his Ph.D. in applied physics and materials engineering from the University of Macau in 2022. Since then, he has been doing his postdoctoral research in the Department of Physics at Fudan University. Starting in Mar. 2025, he will join the Heinz Maier-Leibnitz Zentrum (MLZ), a collaborative neutron facility between Forschungszentrum Jülich (FZJ) and Technische Universität München (TUM), for postdoctoral research, funded by the Marie Skłodowska-Curie Scholars Program. His research primarily focuses on single crystal growth of correlated electron systems, magnetism, transport and thermodynamic characterization, and the use of neutron scattering techniques to study phase transitions and spin dynamics.
讲座摘要：
The search for new high-temperature superconductors beyond the copper-based paradigm offers exciting opportunities to deepen our understanding of superconductivity mechanisms and explore new applications. In this talk, I will present our successful synthesis of high-quality trilayer nickelate La4Ni3O10-δ single crystals with minimal oxygen deficiency, achieved through the high-pressure optical floating zone technique. Our results show that applying pressure effectively suppresses spin and charge order in La4Ni3O10-δ, leading to the emergence of superconductivity with a maximum Tc of around 30 K at 69.0 Gpa [1]. Susceptibility measurements reveal a strong diamagnetic response below Tc, confirming bulk superconductivity. In the normal state, we observe 'strange metal' behavior, marked by linear temperature-dependent resistance up to 300 K. This system's layer-dependent superconductivity suggests a distinct interlayer coupling mechanism, distinct from cuprates. Recently, we have also observed pressurized bulk superconductivity in Pr4Ni3O10 single crystals [2]. These findings offer insights into the superconducting mechanisms and introduce a new material platform to study the interplay between various electronic phenomena, including spin/charge order, flat band structure, interlayer coupling, strange metal behavior and superconductivity.
References
[1] Nature 631, 531-536 (2024), superconductivity in pressurized trilayer La4Ni3O10-δ single crystals.
[2] arXiv: 2501.17709v1 (2025), bulk superconductivity in pressurized trilayer nickelate Pr4Ni3O10 single crystals
邀请人：邓昊
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