Scattering of impure mode and self-trapping phenomenon in a 1D quantum diatomic Klein–Gordon chain containing a mass defectR. Abouem A. Ribama, Z. I. Djoufack and J. P. NguenangEur. Phys. J. Plus, 139 2 (2024) 193DOI: https://doi.org/10.1140/epjp/s13360-024-04973-y