Semi-Dirac semimetal in silicene oxide.

Area of Science:

• Condensed Matter Physics
• Materials Science
• Theoretical Chemistry

Background:

• Semi-Dirac semimetals possess unique electronic properties due to mixed linear and quadratic band dispersion.
• Realizing these materials in practice has been challenging.
• Honeycomb materials are susceptible to chemical modification.

Purpose of the Study:

• To theoretically propose a novel approach for creating semi-Dirac semimetals.
• To identify a candidate material exhibiting semi-Dirac properties.

Main Methods:

• Theoretical modeling of band structures.
• Utilizing covalent addition of group-VI elements.
• Applying strain engineering to honeycomb materials.
• Analyzing the effect of p-orbital frustration.

Main Results:

• Silicene oxide (Si2O) is predicted to be a semi-Dirac semimetal.
• The proposed method effectively modifies band structures of graphene-like materials.
• p-orbital frustration plays a key role in achieving the desired band dispersion.

Conclusions:

• Silicene oxide is a promising candidate for realizing semi-Dirac semimetal properties.
• Covalent modification and strain engineering offer a viable route to design novel electronic materials.
• This work provides a theoretical foundation for experimental exploration of new semimetals.