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Carrier Transport

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The generation of electrical current in semiconductors is fundamentally driven by two mechanisms: drift and diffusion. These processes are essential for the functionality and performance of semiconductor-based devices.
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Band Theory

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Related Experiment Video

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Fabrication of Gate-tunable Graphene Devices for Scanning Tunneling Microscopy Studies with Coulomb Impurities

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Published on: July 24, 2015

Disorder and electronic transport in graphene.

E R Mucciolo¹, C H Lewenkopf

¹Department of Physics, University of Central Florida, Orlando, FL 32816-2385, USA. mucciolo@physics.ucf.edu

Journal of Physics. Condensed Matter : an Institute of Physics Journal

|March 15, 2011

Summary

This review explores electronic transport in disordered graphene, detailing how band structure and symmetries influence conductivity. It covers disorder types, localization, and carrier density effects, highlighting open research questions.

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Area of Science:

Condensed Matter Physics
Materials Science

Background:

Graphene's unique electronic properties are significantly affected by structural imperfections.
Understanding electronic transport in disordered systems is crucial for developing advanced graphene-based devices.

Purpose of the Study:

To review recent theoretical and experimental progress in electronic transport within disordered graphene.
To elucidate the relationship between disorder characteristics and transport phenomena in graphene.

Main Methods:

Theoretical analysis focusing on band structure properties and lattice symmetries.
Examination of various types of disorder, including short-range and long-range.
Discussion of localization effects (strong and weak) and their impact on conductivity.

Main Results:

Disorder significantly alters graphene's electronic transport properties.
Band structure and lattice symmetries play a key role in determining transport behavior.
Localization phenomena and carrier density dependence of conductivity are critical aspects.

Conclusions:

Recent advancements provide a deeper understanding of electronic transport in disordered graphene.
Further research is needed to address open problems related to localization and conductance fluctuations.