Electrical spin injection and detection in Germanium using three terminal geometry

A. Jain; L. Louahadj; J. Peiro; J. C. Le Breton; C. Vergnaud; A. Barski; C. Beigné; L. Notin; A. Marty; V. Baltz; S. Auffret; E. Augendre; H. Jaffrès; J. M. George; M. Jamet

doi:10.1063/1.3652757

Electrical spin injection and detection in Germanium using three terminal geometry

Materials Science 2015-05-28 v1

Authors: A. Jain , L. Louahadj , J. Peiro , J. C. Le Breton , C. Vergnaud , A. Barski , C. Beigné , L. Notin , A. Marty , V. Baltz , S. Auffret , E. Augendre , H. Jaffrès , J. M. George , M. Jamet

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Abstract

In this letter, we report on successful electrical spin injection and detection in \textit{n}-type germanium-on-insulator (GOI) using a Co/Py/Al $_{2}$ O $_{3}$ spin injector and 3-terminal non-local measurements. We observe an enhanced spin accumulation signal of the order of 1 meV consistent with the sequential tunneling process via interface states in the vicinity of the Al $_{2}$ O $_{3}$ /Ge interface. This spin signal is further observable up to 220 K. Moreover, the presence of a strong \textit{inverted} Hanle effect points at the influence of random fields arising from interface roughness on the injected spins.

Keywords

spintronics

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@article{arxiv.1107.3510,
  title  = {Electrical spin injection and detection in Germanium using three terminal geometry},
  author = {A. Jain and L. Louahadj and J. Peiro and J. C. Le Breton and C. Vergnaud and A. Barski and C. Beigné and L. Notin and A. Marty and V. Baltz and S. Auffret and E. Augendre and H. Jaffrès and J. M. George and M. Jamet},
  journal= {arXiv preprint arXiv:1107.3510},
  year   = {2015}
}

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4 pages, 3 figures

Electrical spin injection and detection in Germanium using three terminal geometry

Abstract

Keywords

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