Long-lived state of a helium-like magnesium donor in silicon

R. Kh. Zhukavin; D. A. Postnov; P. A. Bushuikin; K. E. Kudryavtsev; K. A. Kovalevsky; V. V. Tsyplenkov; Н.А. Бекин; A. N. Lodygin; Л.М. Порцель; В.Б. Шуман; Yu. A. Astrov; N. V. Abrosimov; V. N. Shastin

doi:10.48550/arxiv.2601.04933

Long-lived state of a helium-like magnesium donor in silicon

arXiv (Cornell University) 2026 Preprint Open access

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Authors: R. Kh. Zhukavin, D. A. Postnov, P. A. Bushuikin, K. E. Kudryavtsev, K. A. Kovalevsky, V. V. Tsyplenkov, Н.А. Бекин, A. N. Lodygin, Л.М. Порцель, В.Б. Шуман, Yu. A. Astrov, N. V. Abrosimov

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V. N. Shastin

DOI: 10.48550/arxiv.2601.04933

Cited by: 0

Abstract

The relaxation of ortho states of a helium-like Mg donor in silicon is investigated by measuring the modulation of background radiation transmission through impurity centers under pulsed photoexcitation. Long-lived states of the spin-triplet 1s(3T2) group with a lifetime of about 20 ms are observed. The temperature dependence indicates that the relaxation is governed by the Orbach mechanism with an activation energy ~13 meV, which is close to the exchange splitting energy of the excited 1s states of the Mg donor.

Fields of Study & Subjects

Silicon and Solar Cell Technologies Rare-earth and actinide compounds Muon and positron interactions and applications

Publication details

Journal / source: arXiv (Cornell University)
Publication date: 8 January 2026
Document type: Preprint