The University of Tokyo · Physics and Astronomy
Akito Sakai 교수의 연구실은 주로 희토류 인산염 및 희토류 이트륨 산화물계의 강한 전자 상호작용을 다루며, 특히 4f 전자 상태와 전도 전자 간의 강한 하이브리드화가 나타나는 쿠리오-페르미 액체 및 Kondo 효과를 중심으로 연구를 진행하고 있습니다. 고순도 단결정을 이용한 열역학적, 전기적 성질 측정을 통해 비등방성 초전도성과 다중극자 순서 현상의 기원을 규명하고 있으며, 특히 초저온에서의 비정상적 초전도성과 강한 전자 상관 효과의 상전이를 탐구하고 있습니다. 이는 신소재 개발과 양자물리학의 기초를 다지는 데 기여하고 있습니다.
Figures are computed from collected data and may differ slightly.
The role of the hepatitis C virus (HCV) p7 protein in the virus life cycle is not known. Previous in vitro data indicated that this 63-aa polypeptide is located in the endoplasmic reticulum and has two transmembrane domains (TMDs) connected by a cytoplasmic loop; the amino- and carboxyl-terminal tails are oriented toward the endoplasmic reticulum lumen. Furthermore, recent in vitro studies suggested that HCV p7 could function as a virus-encoded ion channel. It might therefore be a relevant targe
The cubic compound PrTi$_2$Al$_{20}$ is a quadrupolar Kondo lattice system that exhibits quadrupolar ordering due to the non-Kramers $\Gamma_3$ ground doublet and has strong hybridization between $4f$ and conduction electrons. Our study using high-purity single crystal reveals that PrTi$_2$Al$_{20}$ exhibits type-II superconductivity at $T_{\rm c} = 200$ mK in the nonmagnetic ferroquadrupolar state. The superconducting critical temperature and field phase diagram suggests moderately enhanced eff
We present a single-crystal study of low-temperature magnetism and transport in Sm$T{r}_{2}$Al${}_{20}$ ($Tr=\text{Ti}$, V, and Cr). Strong valence fluctuation is manifested as Kondo effects, including a large Sommerfeld coefficient $\ensuremath{\gamma}$, a weak temperature dependence of magnetic susceptibility, and a $\ensuremath{-}\mathrm{ln}T$ dependent resistivity. All the systems order antiferromagnetically at ${T}_{\mathrm{N}}=6.4$ K (Ti), 2.9 K (V), and 1.8 K (Cr). A systematic change in
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