Abstract
The structural stability and electronic properties of graphene-like alloy nanosheets composed of group IV elements, such as monolayer SixGe1−x, GexSn1−x, and SixSn1−x, are systematically investigated by means of density functional calculations. Our calculations demonstrate that the buckled configuration is stabilized over the entire composition range. The analysis of band structures reveals that a linear band dispersion with Dirac cone at the K point similar to graphene appears in SixGe1−x, whereas a small energy gap within 0.23 eV is formed at the K point in SixSn1−x and GexSn1−x for 0.375 ≤ x ≤ 0.625. These results suggest that composition control is of importance in tailoring the electronic properties of group IV alloy nanosheets.
Sign-in/Register to access full text options 
Free) 
Talk to us
Join us for a 30 min session where you can share your feedback and ask us any queries you have
Schedule a call
