Šimėnas, M;
O'Sullivan, J;
Kennedy, OW;
Lin, S;
Fearn, S;
Zollitsch, CW;
Dold, G;
... Morton, JJL; + view all
(2022)
Near-Surface Te+ 125 Spins with Millisecond Coherence Lifetime.
Physical Review Letters
, 129
(11)
, Article 117701. 10.1103/PhysRevLett.129.117701.
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Abstract
Impurity spins in crystal matrices are promising components in quantum technologies, particularly if they can maintain their spin properties when close to surfaces and material interfaces. Here, we investigate an attractive candidate for microwave-domain applications, the spins of group-VI Te+125 donors implanted into natural Si at depths as shallow as 20 nm. We show that surface band bending can be used to ionize such near-surface Te to spin-active Te+ state, and that optical illumination can be used further to control the Te donor charge state. We examine spin activation yield, spin linewidth, and relaxation (T1) and coherence times (T2) and show how a zero-field 3.5 GHz "clock transition"extends spin coherence times to over 1 ms, which is about an order of magnitude longer than other near-surface spin systems.
| Type: | Article |
|---|---|
| Title: | Near-Surface Te+ 125 Spins with Millisecond Coherence Lifetime |
| Open access status: | An open access version is available from UCL Discovery |
| DOI: | 10.1103/PhysRevLett.129.117701 |
| Publisher version: | https://doi.org/10.1103/PhysRevLett.129.117701 |
| Language: | English |
| Additional information: | Published by the American Physical Society under the terms of the Creative Commons Attribution 4.0 International license. Further distribution of this work must maintain attribution to the author(s) and the published article’s title, journal citation, and DOI. |
| UCL classification: | 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 > London Centre for Nanotechnology UCL > Provost and Vice Provost Offices > UCL BEAMS UCL |
| URI: | https://discovery-pp.ucl.ac.uk/id/eprint/10156706 |
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