Valley spin-orbit interaction for the triplet and doublet 1sground states of lithium donor center in monoisotopic [sup 28]Si

Abstract

Valley spin-orbit interaction for the triplet and doublet 1s-ground states of lithium donor center in monoisotopic 28Si was studied in order to determine its contribution to the electron spin relaxation rate. We observed new electron paramagnetic resonance spectra of lithium in monoisotopic silicon with g<2.000 and found the spin Hamiltonian parameters for it. Using our experimental results and taking into account spin-orbit coupling between the triplet states and the triplet and doublet states we found that the lithium donor electron spectrum and g-factors for its states strongly depend on both the internal strains in the crystal and the intervalley spin-orbit interactions.