@article{68134d8dcd9d4069a31005185f367919,
title = "Crystal orientation effect on spin injection/detection efficiency in Si lateral spin-valve devices",
abstract = "We show evident crystal orientation effect on pure spin current transport in Si-based lateral spin-valve (LSV) devices with epitaxially grown CoFe/MgO tunnel contacts. When we compare nonlocal spin signals between LSV devices along 1 0 0 (Si1 0 0) and 1 1 0 (Si1 1 0), we find that the magnitude of the spin signals for Si1 0 0 LSV devices is always larger than that for Si1 1 0 LSV devices. The analyses based on the one-dimensional spin diffusion model reveal that the spin diffusion length and spin lifetime between Si1 0 0 and Si1 1 0 LSV devices are comparable, while the spin injection/detection efficiency in Si1 0 0 LSV devices is evidently larger than that in Si1 1 0 ones. Possible origins of the difference in the spin injection/detection efficiency between Si1 0 0 and Si1 1 0 LSV devices are discussed.",
keywords = "semiconductor spintronics, spin injection, spin transport",
author = "Mizue Ishikawa and Makoto Tsukahara and Syuta Honda and Yuichi Fujita and Michihiro Yamada and Yoshiaki Saito and Takashi Kimura and Hiroyoshi Itoh and Kohei Hamaya",
note = "Funding Information: M I and K H acknowledge Dr H Sugiyama of Toshiba Corporation for useful discussion about the pure spin current transport in Si and the magnetocrystalline anisotropy of the CoFe layer on MgO/(0 0 1)SOI, respectively. This work was partly supported by a Grant-in-Aid for Scientific Research (A) (No. 16H02333) from the Japan Society for the Promotion of Science (JSPS), and a Grant-in-Aid for Scientific Research on Innovative Areas {\textquoteleft}Nano Spin Conversion Science{\textquoteright} (Nos. 26103002 and 26103003) from the Ministry of Education, Culture, Sports, Science, and Technology (MEXT). Publisher Copyright: {\textcopyright} 2018 IOP Publishing Ltd.",
year = "2019",
month = feb,
day = "20",
doi = "10.1088/1361-6463/aaf37c",
language = "English",
volume = "52",
journal = "Journal Physics D: Applied Physics",
issn = "0022-3727",
publisher = "IOP Publishing Ltd.",
number = "8",
}