The $(e_g\otimes e_u)\otimes E_g$ product Jahn-Teller effect in the neutral group-IV--vacancy quantum bits in diamond

Gergő Thiering, Adam Gali

The product Jahn-Teller (pJT) effect may occur for such coupled electron-phonon systems in solids where single electrons occupy double degenerate orbitals. We propose that the exci…