Sauter, E.; Abrosimov, N.V.; Hübner, J.; Oestreich, M.
(College Park, MD : APS, 2023)
We measure the temperature dependence of the indirect band gap of isotopically purified 28Si:P in the regime from 0.1 K to 3 K by high-resolution absorption spectroscopy of the donor bound exciton transition. The measurements ...