Developing the half-metallic ferromagnetism in semimetal germanene monolayer: synergistic effects of band gap opening and magnetism engineering.

ABSTRACT: Similar to graphene, the germanene monolayer could be a promising two-dimensional (2D) platform for spintronic applications. In this work, efficient doping routes are proposed to develop the half-metallic ferromagnetism in the germanene monolayer, based on the synergistic effects of band gap opening and magnetism engineering. The pristine germanene monolayer is a semimetal, exhibiting a Dirac cone originating mainly from the Ge-p _z state. The band gap opening can be achieved by doping with chalcogen atoms. Specifically, single S and Se impurities give a direct gap of 0.28 and 0.27 eV, respectively. This parameter increases up to 0.50 and 0.49 eV, respectively, when increasing the doping level. Moreover, Mn doping induces significant magnetism in the germanene monolayer wi

SUBMITTER: Nguyen DK 

PROVIDER: S-EPMC12519115 | biostudies-literature | 2025 Oct

REPOSITORIES: biostudies-literature