期刊
NATURE MATERIALS
卷 16, 期 6, 页码 609-+出版社
NATURE PUBLISHING GROUP
DOI: 10.1038/NMAT4857
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资金
- Ministry of Education, Culture, Sports, Science and Technology (MEXT) of Japan [26103003, 16H0633]
- JSPS KAKENHI [16J00485, 25286506]
- Elements Strategy Initiative to Form Core Research Center
- Grants-in-Aid for Scientific Research [26103003, 26286039, 16J00485, 16H06089] Funding Source: KAKEN
A d-porbital electron has an anisotropic electron orbital and is a source of magnetism. The realization of a two-pdimensional electron gas (2DEG) embedded at a LaAlO3/SrTiO3 interface surprised researchers in materials and physical sciences because the 2DEG consists of 3d-pelectrons of Ti with extraordinarily large carrier mobility, even in the insulating oxide heterostructure. To date, a wide variety of physical phenomena, such as ferromagnetism and the quantum Hall effect, have been discovered in this 2DEG system, demonstrating the ability of d-pelectron 2DEG systems to provide a material platform for the study of interesting physics. However, because of both ferromagnetism and the Rashba field, long-prange spin transport and the exploitation of spintronics functions have been believed dificult to implement in d-pelectron 2DEG systems. Here, we report the experimental demonstration of room-ptemperature spin transport in a d-pelectron-pbased 2DEG at a LaAlO3/SrTiO3 interface, where the spin relaxation length is about 300 nm. Our finding, which counters the conventional understandings of d-pelectron 2DEGs, highlights the spin-pfunctionality of conductive oxide systems and opens the field of d-pelectron spintronics.
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