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Suppressing Klein tunneling in graphene using a one-dimensional array of localized scatterers
1Department of Chemistry, University of Miami, Coral Gables, Florida 33124, USA.
Scientific Reports
|February 14, 2015
Summary
Researchers found that periodic openings in graphene potential barriers can reduce electron transmission, a key finding for developing new graphene electronic devices by suppressing Klein tunneling.
Area of Science:
- Condensed matter physics
- Materials science
- Nanotechnology
Background:
- Graphene exhibits unique properties suitable for micro- and nanoelectronic applications.
- Klein tunneling, perfect electron transmission through potential barriers, poses a challenge for electrostatic control in graphene.
Purpose of the Study:
- To investigate methods for controlling electron flow in graphene.
- To explore strategies for overcoming the limitations imposed by Klein tunneling.
Main Methods:
- Theoretical calculations
- Numerical simulations
Main Results:
- Electron transmission probability decreases when electron wavelength is smaller than scatterer spacing in periodic potential barriers.
- Periodic openings in potential barriers can counterintuitively reduce transmission in graphene.
Conclusions:
- Spatial variations in electrostatic potentials, comparable to electron wavelength, can suppress Klein tunneling.
- This finding offers potential applications for advanced graphene electronic devices.
