[8a-Z07-1~8] 6.3 Oxide electronics

△ [8a-Z07-2] Quantum transport evidence of Weyl fermions in a high-quality ferromagnetic perovskite oxide SrRuO₃ thin film

〇Kosuke Takiguchi^1,2, Yuki K. Wakabayashi¹, Hiroshi Irie¹, Yoshiharu Krockenberger¹, Takuma Otsuka³, Hiroshi Sawada³, Sergey A. Nikolaev⁴, Hena Das⁴, Masaaki Tanaka^2,5, Taniyasu Yoshitaka¹, Hideki Yamamoto¹ (1.NTT-BRL, 2.UTokyo, Eng., 3.NTT-CSL, 4.Tokyo Tech. WRHI, 5.UTokyo, CSRN)

Keywords:Weyl semimetal, perovskite oxide

Recently, Weyl fermions in ferromagnetic materials attract much attention because of their potential use in high-performance electronics, spintronics and quantum computing. SrRuO₃, a 4d ferromagnetic metal with the perovskite structure, provides a promising opportunity to seek the existence of Weyl fermions in magnetic materials. However, there is no experimental evidence of the Weyl fermions in SrRuO₃ due to difficulties in preparing high-quality specimens, and such specimens are required to reveal intrinsic transport properties of the purported Weyl fermions.In this presentation, we report the quantum transport evidence of the Weyl fermions in an epitaxial SrRuO₃ film with the best crystal quality ever reported.