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Stacking and electric field effects in atomically thin layers of GaN
Dongwei Xu1, Haiying He, Ravindra Pandey
1Department of Physics, Michigan Technological University, Houghton, MI 49931, USA.
Summary
Atomically thin gallium nitride (GaN) multilayers exhibit unique electronic properties. Applied electric fields tune the band gap, making GaN ideal for advanced nanoscale electronic devices.
Area of Science:
- Materials Science
- Condensed Matter Physics
- Nanotechnology
Background:
- Atomically thin nitride layers are gaining interest for novel applications.
- Gallium nitride (GaN) is a key material in semiconductor technology.
Purpose of the Study:
- Investigate the stability of GaN multilayers.
- Analyze the effects of stacking and electric fields on GaN electronic properties.
Main Methods:
- Density functional theory (DFT) calculations were employed.
- Simulations focused on GaN bilayers and trilayers.
Main Results:
- GaN bilayers and trilayers favor planar configurations.
- An external electric field significantly reduces the band gap of trilayers, while leaving monolayers unaffected.
- Stacking configuration influences the band gap response to electric fields.
Conclusions:
- Multilayer GaN exhibits tunable electronic properties based on stacking and electric fields.
- This tunability makes GaN a promising material for next-generation nanoscale electronic devices.
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