Boson peak and beta-relaxation are two intrinsic and markedly different dynamic modes of glasses, and their structural origins are long-standing issues. Through tuning atomic packing of a model metallic glass with microalloying of different types of elements, we find that low-temperature boson heat capacity peak evolves hand in hand with high-temperature beta-relaxation. A linear correlation between the boson peak temperature and the activation energy of beta-relaxation is disclosed. The coupling of the boson peak and the beta-relaxation indicates their common structural origin of the loosely packed regions in metallic glasses.
@article{arxiv.1507.00405,
title = {Hand in Hand Evolution of b-relaxation and Boson Peak in Metallic Glasses},
author = {B. Huang and Z. G. Zhu and T. P. Ge and H. Y. Bai and W. H. Wang},
journal= {arXiv preprint arXiv:1507.00405},
year = {2015}
}