[6a-C18-1~12] 10.2 スピン基盤技術・萌芽的デバイス技術

▼ [6a-C18-1] Observation of the spin transport at a LaAlO₃/SrTiO₃ interface at room temperature

〇(D)Ryo Ohshima^1,2、Yuichiro Ando¹、Kosuke Matsuzaki³、Tomofumi Susaki³、Mathias Weiler^4,5、Stefan Klingler^4,5、Hans Huebl^4,5,6、Eiji Shikoh⁷、Teruya Shinjo¹、Sebastian Goennwein^4,5,6、Masashi Shiraishi¹ (1.Kyoto Univ.、2.Osaka Univ.、3.Tokyo Tech.、4.WMI、5.TU Munich、6.NI Munich、7.Osaka City Univ.)

キーワード：Spintronics, Spin transport, Oxide heterostructure

A two-dimensional electron gas (2DEG) at LaAlO₃/SrTiO₃ (LAO/STO) interfaces consists of d-orbital electrons. A d-electron is localized and a source of magnetism in 3d transition ferromagnets, however, this d-electron 2DEG enables us to investigate a d-electrons as carriers of charge and spin. A wide variety of physical phenomena, such as ferromagnetism, superconductivity and even their coexistence have been observed in this 2DEG, demonstrating the ability of d-electron 2DEGs to enable a material platform for the study of a lot of ordering phenomena in solid-state physics. An experimental demonstration of spin transport via d-electrons is challenging as the conventional understanding of the d-electrons character suggests only a short-range spin coherence. In contrast, we demonstrate the spin transport in d-electron 2DEG at LAO/STO interfaces at room temperature on the micron scale.