Murata, K;
Kirkham, C;
Tsubomatsu, S;
Kanazawa, T;
Nitta, K;
Terada, Y;
Uruga, T;
... Miki, K; + view all
(2018)
Atomic layer doping of Mn magnetic impurities from surface chains at a Ge/Si hetero-interface.
Nanoscale
, 10
(1)
pp. 295-301.
10.1039/c7nr07177a.
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Abstract
We realize Mn δ-doping into Si and Si/Ge interfaces using Mn atomic chains on Si(001). Highly sensitive X-ray absorption fine structure techniques reveal that encapsulation at room temperature prevents the formation of silicides/germanides while maintaining one-dimensional anisotropic structures. This is revealed by studying both the incident X-ray polarization dependence and post-annealing effects. Density functional theory calculations suggest that Mn atoms are located at substitutional sites, and show good agreement with experiment. A comprehensive magnetotransport study reveals magnetic ordering within the Mn δ-doped layer, which is observed at around 120 K. We demonstrate that doping methods based on the burial of surface nanostructures allows for the realization of systems for which conventional doping methods fail.
| Type: | Article |
|---|---|
| Title: | Atomic layer doping of Mn magnetic impurities from surface chains at a Ge/Si hetero-interface |
| Location: | England |
| Open access status: | An open access version is available from UCL Discovery |
| DOI: | 10.1039/c7nr07177a |
| Publisher version: | http://doi.org/10.1039/c7nr07177a |
| Language: | English |
| Additional information: | This version is the author accepted manuscript. For information on re-use, please refer to the publisher’s terms and conditions. |
| UCL classification: | UCL UCL > Provost and Vice Provost Offices > UCL BEAMS UCL > Provost and Vice Provost Offices > UCL BEAMS > Faculty of Maths and Physical Sciences UCL > Provost and Vice Provost Offices > UCL BEAMS > Faculty of Maths and Physical Sciences > Dept of Physics and Astronomy |
| URI: | https://discovery.ucl.ac.uk/id/eprint/10040519 |
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