Thermal and Thermoelectric Transport in Graphene

The Role of Electron–Phonon Interactions

Authored by: Muñoz Enrique

Graphene Science Handbook

Print publication date:  April  2016
Online publication date:  April  2016

Print ISBN: 9781466591318
eBook ISBN: 9781466591325
Adobe ISBN:

10.1201/b19642-19

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Abstract

Single-layer graphene possesses remarkable mechanical and electronic properties. Its great flexibility, surprisingly, goes along with the highest Young’s modulus known for any material up to date. These mechanical properties, combined with the two-dimensional topology of graphene, determine its phonon spectrum. On the other hand, the singular features of the electronic spectrum determine its semimetallic behavior in the vicinity of the so-called Dirac points, where conduction electrons exhibit relativistic dynamics as chiral massless fermions in two dimensions. Transport properties at nonzero temperature are strongly affected by the interplay between mechanics and electronics: the interaction between electrons and phonons. Along this chapter, thermal and thermoelectric transport properties of graphene will be described and discussed. Different scattering mechanisms affecting transport coefficients will be analyzed, with emphasis on the role of electron–phonon interactions and mechanical stress. Theoretical approaches to include these scattering mechanisms in the modeling of thermal and thermoelectric transport will be covered in detail, and predictions will be compared with experimental values. Finally, we will discuss the possibilities for engineering thermal and thermoelectric transport coefficients in graphene by controlling electron–phonon interactions.

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