Year: 2022
Type: article
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 ^{125}Te^{+} 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 (T_{1}) and coherence times (T_{2}) 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.
Source: Physical Review Letters
Language: Latvian
Subfield: Atomic and Molecular Physics, and Optics
Field: Physics and Astronomy
Domain: Physical Sciences
Open Access status: hybrid
Estimated APC paid: $3,750
Awards: Training & Skills Hub in Quantum Systems Engineering: innovation in Quantum Business - Applications, Technology and Engineering (InQuBATE), Many-body quantum correlations in superradiant diamond maser, G3453477279, G3555612444, Local quantum operations achieved through the motion of spins, G5045220161, Quantum technology capital: QUES2T (Quantum Engineering of Solid-state Technologies), EPSRC Hub in Quantum Computing and Simulation, Room Temperature Continuous-Wave Inorganic Maser
OpenAlex ID: W4295135606