Insight into novel ErMI (M = S, Se) chalcohalide materials for next-generation energy applications.

ABSTRACT: The study unveils an inclusive first-principles study of the electronic structure, optical, thermoelectric, and elastic properties of two novel rare-earth chalcohalides, ErSI and ErSeI, through density functional theory with the GGA + U approach, which includes spin-orbit coupling to account for strong 4f electron correlations. These systems are both dynamically and mechanically stable, having negative cohesive and formation energies, and fulfill all Born criteria for orthorhombic systems. An investigation of electronic band structure shows that ErSI and ErSeI are spin-polarized direct band gap semiconductors with notable exchange splitting and spin-channel asymmetry. ErSI has a larger band gap and enhanced localization of Er-4f states, whereas ErSeI has more dispersive bands, imply

SUBMITTER: Al-Hmoud M 

PROVIDER: S-EPMC12452083 | biostudies-literature | 2025 Sep

REPOSITORIES: biostudies-literature