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Updated: Apr 30, 2026
11:42
Fabrication of Gate-tunable Graphene Devices for Scanning Tunneling Microscopy Studies with Coulomb Impurities
Published on: July 24, 2015
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Optical conductivity of curved graphene
A J Chaves1, T Frederico, O Oliveira
1Departamento de Física, Instituto Tecnológico de Aeronáutica, DCTA, 12228-900 SãoJosé dos Campos, Brazil.
Summary
Out-of-plane deformations in graphene enhance optical conductivity peaks in infrared frequencies. This effect, driven by intraband transitions, opens possibilities for novel electronic interference devices.
Area of Science:
- Condensed Matter Physics
- Materials Science
- Quantum Mechanics
Background:
- Graphene's unique electronic properties stem from its 2D hexagonal lattice structure.
- Optical conductivity is a key parameter characterizing light-matter interactions in materials.
- Deformations can significantly alter electronic band structures and optical responses.
Purpose of the Study:
- To investigate the impact of out-of-plane deformations on graphene's optical conductivity.
- To explore the underlying physical mechanisms responsible for changes in optical properties.
- To analyze the potential for creating novel quantum interference devices.
Main Methods:
- Solving the Dirac equation in curved spacetime to model deformed graphene.
- Analyzing the optical conductivity through intraband transitions.
- Deriving analytical solutions for electron wave functions in deformed geometries.
Main Results:
- Periodic deformations (∼100 nm) enhance optical conductivity peaks in the far- and mid-infrared regions.
- Deformation parameters allow tuning of peak width and position.
- Curvature-induced phase shifts in electron wave functions are predicted.
Conclusions:
- Out-of-plane deformations offer a pathway to engineer graphene's optical response.
- Geometrical deformation breaks translational invariance, enhancing optical conductivity.
- The curvature-induced phase can be utilized for Aharonov-Bohm type interference devices.
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