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Edge defect switched dual spin filter in zigzag hexagonal boron nitride nanoribbons
Yan-Dong Guo1, Hui-Feng Liu1, Hong-Li Zeng2
1College of Electronic and Optical Engineering, Nanjing University of Posts and Telecommunications, Nanjing 210023, China and Key Laboratory of Radio Frequency and Micro Nano Electronics of Jiangsu Province, Nanjing 210023, China.
Physical Chemistry Chemical Physics : PCCP
|March 22, 2018
Summary
Defects in zigzag hexagonal boron nitride nanoribbons enable dual spin filtering. This spintronic effect, where spin polarization direction is switched by defects, is robust and could lead to new electronic devices.
Area of Science:
- Condensed matter physics
- Materials science
- Nanotechnology
Background:
- Hexagonal boron nitride nanoribbons (BNNRs) exhibit distinct B and N edges, unlike graphene nanoribbons.
- Edge properties significantly influence the electronic transport in nanostructures.
Purpose of the Study:
- Investigate the spin-dependent electronic transport in zigzag monolayer hexagonal boron nitride nanoribbons (ZBNNRs) with edge defects.
- Explore the potential of ZBNNRs as dual spin filters.
Main Methods:
- First-principles calculations were employed to simulate electronic transport.
- Analysis focused on spin polarization, transmission eigenchannels, and defect effects.
Main Results:
- Edge defects induce a dual spin filter effect, switching spin polarization direction.
- Transmission channels for opposite spins are spatially separated on opposite edges.
- The dual spin filter effect is independent of ribbon width and defect length.
Conclusions:
- ZBNNRs with edge defects function as dual spin filters, offering controllable spin manipulation.
- Constructing defects on both edges enables electrically controlled dual spin filtering.
- These findings pave the way for developing novel B/N-based spintronic devices.
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