Topologic connection between 2-D layered structures and 3-D diamond structures for conventional semiconductors.

Area of Science:

• Materials Science
• Condensed Matter Physics
• Computational Materials Science

Background:

• Discovering new 2D materials is crucial for next-generation electronics.
• Traditionally, 2D materials are sought from layered precursors, but 3D materials offer unexplored potential.

Purpose of the Study:

• To systematically investigate common Group IV, III-V, and II-VI semiconductors as potential sources for novel 2D materials.
• To identify new 2D structures derived from 3D parent materials through controlled deformation.

Main Methods:

• Density Functional Theory (DFT) calculations were employed.
• Systematic study of Group IV, III-V, and II-VI semiconductors under compressive and tensile strain along symmetry axes.
• Analysis of total energy changes to identify metastable states and phonon spectra for structural stability.

Main Results:

• Two major phase transition paths (from wurtzite and NiAs structures) were identified.
• Tensile strain led to low and high buckled monolayer structures.
• Promising new 2D materials identified include BeO, GaN, ZnO (tensile strain) and Ge, Si, GaP (compressive strain).

Conclusions:

• 3D semiconductors can be a viable source for novel 2D materials.
• Controlled strain engineering is an effective method for discovering new 2D materials.
• The identified materials hold promise for future electronic and optoelectronic applications.