[17a-P01-1~29] 9 Applied Materials Science (Poster)

[17a-P01-18] Carrier filtering effect in the body-centered tetragonal oxide Sr₂RuO₄

〇Ryuji Okazaki¹, Ryota Otsuki¹, Kaito Taniguchi¹, Shogo Yoshida¹, Tomoya Komine¹, Ryosuke Kurihara¹, Hiroshi Yaguchi¹, Yoshiki Sato² (1.Tokyo Univ. of Sci., 2.Saitama Univ.)

Keywords:

oxide thermoelectrics,ruthenate

Recently, it has been theoretically proposed that a large thermopower may be induced by strong electron-hole asymmetry of their velocities due to a unique band structure in the body-centered tetragonal systems. Here, we have examined such effect in the body-centered tetragonal oxide Sr₂RuO₄, and find a large thermopower exceeding the value of the conventional high-temperature limit expected from the Heikes formula.