腾讯会议：420-511-631

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报告摘要：
PrOs₄Sb₁₂ is an interesting material that, in addition to heavy-fermion superconductivity, exhibits an unusual ordered phase (FIOP) in high magnetic fields, and its relationship to antiferroquadrupolar (AFQ) correlations has been discussed. We performed transport measurements under high pressure up to approximately 10 GPa in order to clarify pressure effects on the interplay between superconductivity and multi-polar order. From electrical resistivity measurements down to 0.3 K, we found that the superconducting transition persists up to 9.8 GPa, and that Tc decreases on the low-pressure side and then shows an almost pressure-independent tendency on the high-pressure side. Furthermore, in transverse magnetoresistance at 0.5 K, we clarified that the anomalies corresponding to the FIOP/AFQ boundary are suppressed with increasing pressure and disappear above approximately 7 GPa. In the talk, we will present these pressure effects on the high-field multi-polar order and superconductivity in more detail. In addition, based on a low-temperature normal-state resistivity analysis, we will discuss the pressure evolution of scattering in a manner.

报告人简介：
Prof. Yoshiya Uwatoko is an experimental physicist in the fields of high-pressure and strongly correlated electronic systems. He obtained his PhD from the Hiroshima University in 1988. After a three-year Research Associate in Kumamoto University and short-time Visiting Researcher in Los Alamos National Laboratory, USA, he joined the Saitama University as an Associate Professor in 1995. In 2001, he moved to the University of Tokyo as an Associate Professor and then was promoted as a full Professor in 2013. He worked in the Materials Design and Characterization Laboratory of the Institute for Solid State Physics, University of Tokyo and retired in 2024. He is currently an honorary professor at the University of Tokyo. Prof. Uwatoko is well known for his highly original discoveries in the effect of pressure on strongly correlated systems and the innovative development of high-pressure apparatus. He has published over 600 research papers, including Phys. Rev. Lett., Nat. Commun., Sci. Adv. etc, as well as 13 Books and Review Articles. He received the Rare Earth Society of Japan Award (Shiokawa Award) in 2020. He is the membership of Physical Society of Japan, the Japan Society of High Pressure Science and Technology, the Rare Earth Society of Japan, the Japanese Society for Neutron Science.

邀请人：程金光 研究员

　　　　王铂森 研究员

联系人：王慧颖 why@iphy.ac.cn