A two-dimensional Fe-doped SnS<sub>2</sub> magnetic semiconductor.
basic_science · Level V
Where this comes from
- Record sourced from PubMed, PMID 29208966.
- Also identified by DOI 10.1038/s41467-017-02077-z and PMC identifier 5717146.
- Licence recorded as CC BY.
- The licence permits redistribution, so the abstract is shown in full and the full text is available from the publisher.
Abstract
Magnetic two-dimensional materials have attracted considerable attention for their significant potential application in spintronics. In this study, we present a high-quality Fe-doped SnS<sub>2</sub> monolayer exfoliated using a micromechanical cleavage method. Fe atoms were doped at the Sn atom sites, and the Fe contents are ∼2.1%, 1.5%, and 1.1%. The field-effect transistors based on the Fe<sub>0.021</sub>Sn<sub>0.979</sub>S<sub>2</sub> monolayer show n-type behavior and exhibit high optoelectronic performance. Magnetic measurements show that pure SnS<sub>2</sub> is diamagnetic, whereas Fe<sub>0.021</sub>Sn<sub>0.979</sub>S<sub>2</sub> exhibits ferromagnetic behavior with a perpendicular anisotropy at 2 K and a Curie temperature of ~31 K. Density functional theory calculations show that long-range ferromagnetic ordering in the Fe-doped SnS<sub>2</sub> monolayer is energetically stable, and the estimated Curie temperature agrees well with the results of our experiment. The results suggest that Fe-doped SnS<sub>2</sub> has significant potential in future nanoelectronic, magnetic, and optoelectronic applications.