2022年第69回応用物理学会春季学術講演会

講演情報

一般セッション(口頭講演)

10 スピントロニクス・マグネティクス » 10.1 新物質・新機能創成(作製・評価技術)

[22p-E205-1~16] 10.1 新物質・新機能創成(作製・評価技術)

2022年3月22日(火) 13:45 〜 18:15 E205 (E205)

大矢 忍(東大)、関 宗俊(東大)、松野 丈夫(阪大)

14:00 〜 14:15

[22p-E205-2] Influence of the multi-orbital hybridizations on the spin-to-charge conversion at the LaAlO3 / SrTiO3 interface

〇Shoma Arai1、Shingo Kaneta-Takada1、Le Duc Anh1、Masaaki Tanaka1,2、Shinobu Ohya1,2 (1.The Univ. of Tokyo、2.CSRN, The Univ. of Tokyo)

キーワード:spin-to-charge conversion, Inverse Edelstein effect, oxide

The recently observed various phenomena of spin-to-charge-current conversion have attracted much attention. The LaAlO3/SrTiO3 (LAO/STO) interface is very promising for efficient spin-to-charge conversion due to the two-dimensional electron gas (2DEG) with a large Rashba spin-orbit interaction. Previously, we calculated the spin-to-charge conversion efficiency, the so-called inverse Edelstein length λIEE, to explain the experimental result. However, the cause of peaks of the jc2D/δs related to spin-to-charge conversion, where jc2D is a two-dimensional charge-current density and δs is spin accumulation, was not clear.
In this study, we investigate the influence of the jc2D and δs separately. The jc2D originating from the dyz band becomes large at around 85 meV, which is probably due to the enhancement of Rashba splitting by hybridization between the dyz band and first dxy subband. This result is expected to deepen our understanding of spin-to-charge conversion.