講演情報
[16a-S4_201-11]Direct thermal imaging of influence of transition metal dichalcogenide interlayer on spin current injection in Pt/Y3Fe5O12 heterostructure
〇(D)Shunichi Takano1,2, Wenjin Zhang2, Yui Tamogami2,3, Takamasa Hirai2, Shunsuke Mori1,2, Yasumitsu Miyata2,3, Ken-ichi Uchida1,2, Yusuke Nakanishi1,2 (1.Univ. Tokyo, 2.NIMS, 3.Tokyo Metro. Univ.)
キーワード：
spin current、transition metal dichalcogenide、spin caloritronics
Spin caloritronics provides a promising platform for novel thermoelectric conversion devices. Typical effects in spin caloritronics include the spin Seebeck effect (SSE) and its reciprocal, the spin Peltier effect (SPE), whose magnitudes are much smaller than those of conventional thermoelectric effects. Recently, enhancement of the SSE-induced voltage by inserting transition metal dichalcogenides WSe2 or WS2 into Pt/YIG heterostructures has been reported, but the underlying mechanism remains unclear. Here, we investigate SPE in Pt/WSe2/YIG and Pt/WS2/YIG structures using lock-in thermography. Clear SPE-induced signals were observed in the Pt/YIG region, whereas they were strongly suppressed in regions with inserted WSe2 or WS2 layers. We will discuss possible origins of the SPE signal reduction.