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Driving interference control by side carbon chains in molecular and two-dimensional nano-constrictions
Dawei Kang1, Weiwei Ju, Shuai Zhang
1School of Physics and Engineering, Henan University of Science and Technology, Luoyang 471023, China. kdw@haust.edu.cn.
Physical Chemistry Chemical Physics : PCCP
|November 21, 2019
Summary
Side carbon chains can control electron transport in nano-devices by modulating quantum interference. This offers a new design strategy for carbon atomic chain nano-devices, showing robust interference modulation.
Area of Science:
- Materials Science
- Condensed Matter Physics
- Nanotechnology
Background:
- Quantum interference effects are crucial for controlling charge transport in nanoscale systems.
- Carbon atomic chains, an sp-hybridized allotrope, are promising for ultimate nano-device construction.
Purpose of the Study:
- To investigate the use of side carbon chains to modulate electron interference patterns in nano-devices.
- To explore the potential of carbon atomic chains beyond simple electron transmission channels.
Main Methods:
- Simulated interference patterns in molecular, graphene nanoribbon, and SiC nanoribbon devices.
- Analyzed the influence of side carbon chain length and position on conductance.
- Investigated the conditions for effective interference modulation.
Main Results:
- Demonstrated interference pattern modulation using side carbon chains in various nano-devices.
- Observed an odd-even oscillation in conductance dependent on side chain length.
- Identified two key criteria for effective interference modulation: local state magnitude and chain length.
Conclusions:
- Side carbon chains offer a novel method for tuning quantum interference and charge transport in nano-devices.
- Achieved robust control over transmission zeros at the Fermi energy, even under strain.
- This research opens new avenues for designing advanced nano-devices utilizing carbon atomic chains.
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