not sufficient conditions for LEEs
Two-level systems in evaporated amorphous silicon
D.R. Queena, X. Liu, J. Karel, H.C. Jacks, T.H. Metcalf, F. Hellman
glass theories - Local excitations in amorphous solids Ji, Wencheng
dangling bonds
- Origin of mechanical and dielectric losses from two-level systems in amorphous silicon https://arxiv.org/pdf/2008.07489.pdf