The paper is published online：R. Chu, X. Shen, J. Wang, S. Sun, M. Wuttig, R. Mazzarello*, Wei Zhang*, Ab initio investigation of amorphous and crystalline arsenic sesqui-chalcogenides: optical properties explained by metavalent bonding, Physica Status Solidi RRL 18, 2400311 (2024) Link.The data supporting this paper can be downloaded from the link below.