Strong evidence for d-electron spin transport at room temperature at a LaAlO3/SrTiO3 interface

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2017
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Ohshima, Ryo
Ando, Yuichiro
Matsuzaki, Kosuke
Susaki, Tomofumi
Weiler, Mathias
Huebl, Hans
Shikoh, Eiji
Shinjo, Teruya
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Nature Materials. Springer Nature. 2017, 16(6), pp. 609-614. ISSN 1476-1122. eISSN 1476-4660. Available under: doi: 10.1038/nmat4857
Zusammenfassung

A d-orbital electron has an anisotropic electron orbital and is a source of magnetism. The realization of a two-dimensional electron gas (2DEG) embedded at a LaAlO3/SrTiO3 interface surprised researchers in materials and physical sciences because the 2DEG consists of 3d-electrons 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-electron 2DEG systems to provide a material platform for the study of interesting physics. However, because of both ferromagnetism and the Rashba field, long-range spin transport and the exploitation of spintronics functions have been believed difficult to implement in d-electron 2DEG systems. Here, we report the experimental demonstration of room-temperature spin transport in a d-electron-based 2DEG at a LaAlO3/SrTiO3 interface, where the spin relaxation length is about 300 nm. Our finding, which counters the conventional understandings of d-electron 2DEGs, highlights the spin-functionality of conductive oxide systems and opens the field of d-electron spintronics.

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ISO 690OHSHIMA, Ryo, Yuichiro ANDO, Kosuke MATSUZAKI, Tomofumi SUSAKI, Mathias WEILER, Stefan KLINGLER, Hans HUEBL, Eiji SHIKOH, Teruya SHINJO, Sebastian T. B. GOENNENWEIN, Masashi SHIRAISHI, 2017. Strong evidence for d-electron spin transport at room temperature at a LaAlO3/SrTiO3 interface. In: Nature Materials. Springer Nature. 2017, 16(6), pp. 609-614. ISSN 1476-1122. eISSN 1476-4660. Available under: doi: 10.1038/nmat4857
BibTex
@article{Ohshima2017Stron-52616,
  year={2017},
  doi={10.1038/nmat4857},
  title={Strong evidence for d-electron spin transport at room temperature at a LaAlO<sub>3</sub>/SrTiO<sub>3</sub> interface},
  number={6},
  volume={16},
  issn={1476-1122},
  journal={Nature Materials},
  pages={609--614},
  author={Ohshima, Ryo and Ando, Yuichiro and Matsuzaki, Kosuke and Susaki, Tomofumi and Weiler, Mathias and Klingler, Stefan and Huebl, Hans and Shikoh, Eiji and Shinjo, Teruya and Goennenwein, Sebastian T. B. and Shiraishi, Masashi}
}
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