[16a-Z32-1~10] 22.1 Joint Session M "Phonon Engineering"

△ [16a-Z32-3] Temperature dependence of thermal conductivity of Cr-doped titanium oxides polycrystalline with an ordered arrangement of planar faults

〇(M1)Shunya Sugimoto¹, Gareoung Kim², Tsunehiro Takeuchi^2,3, Miho Tagawa¹, Toru Ujihara^1,4, Shunta Harada^1,5 (1.Nagoya Univ., 2.Toyota Technological Inst., 3.JST CREST, 4.AIST, 5.JST PRESTO)

Keywords:phonon transport, superlattice

Research is being conducted toward advanced heat transport control by controlling coherent phonons with a periodic structure. At room temperature, phonons on the order of THz contribute to heat conduction, which requires nanoscale periodic structures to control them, and atomic-scale integrity at the interface. Therefore, we are focusing on the natural superlattice of titanium oxide, which has nanoscale periodic surface defects as a thermodynamically stable phase. In this study, we measured the thermal conductivity of titanium oxide natural superlattice polycrystals including a highly complete periodic interface.