Correlation between spin transport signal and Heusler/semiconductor interface quality in lateral spin-valve devices
Correlation between spin transport signal and Heusler/semiconductor interface quality in lateral spin-valve devices
复制标题
横向自旋阀器件中自旋输运信号与 Heusler/半导体界面质量之间的相关性
DOI:
10.1103/physrevb.98.115304
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发表时间:
2018
影响因子:
3.7
通讯作者:
Achinuq B
中科院分区:
文献类型:
--
作者:
Achinuq B
We show direct evidence for the impact of Heusler/semiconductor interfaces atomic structure on the spin transport signals in semiconductor-based lateral spin-valve (LSV) devices. Based on atomic scale Z-contrast scanning transmission electron microscopy and energy dispersive x-ray spectroscopy we show that atomic order/disorder of(CFAS)/-Ge LSV devices is critical for the spin injection in Ge. By conducting a postannealing of the LSV devices, we find 90% decrease in the spin signal while there is no difference in the electrical properties of the-Ge contacts and in the spin diffusion length of the-Ge layer. We show that the reduction in the spin signals after annealing is attributed to the presence of intermixing phases at the Heusler/semiconductor interface. First-principles calculations show how that intermixed interface region has drastically reduced spin polarization at the Fermi level, which is the main cause for the significant decrease of the spin signal in the annealed devices above.
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影响因子:
6.2
作者:
Achinuq B
通讯作者:
Achinuq B
DOI:
10.1063/1.5003244
发表时间:
2016
期刊:
Bulletin of the American Physical Society
影响因子:
--
作者:
F. Rortais;C. Zucchetti;L. Ghirardini;A. Ferrari;C. Vergnaud;J. Widiez;A. Marty;J. Attan'e;H. Jaffrès;J. George;M. Celebrano;G. Isella;F. Ciccacci;M. Finazzi;F. Bottegoni;M. Jamet
通讯作者:
M. Jamet
DOI:
--
发表时间:
2017
期刊:
影响因子:
--
作者:
M. Tsukahara;M. Yamada;Y. Fujita;T. Naito;S. Yamada;K. Sawano;and K. Hamaya
通讯作者:
and K. Hamaya
影响因子:
38.3
作者:
Chuang, Pojen;Ho, Sheng-Chin;Chen, Tse-Ming
通讯作者:
Chen, Tse-Ming
影响因子:
3.7
作者:
Pengke Li;Yang Song;H. Dery
通讯作者:
H. Dery