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arxiv 1403.4603 v1 pith:QB6ON5FO submitted 2014-03-18 cond-mat.mtrl-sci cond-mat.mes-hall

Electron-Phonon Interactions and the Intrinsic Electrical Resistivity of Graphene

classification cond-mat.mtrl-sci cond-mat.mes-hall
keywords resistivityphononsacousticelectricalgrapheneintrinsictheorydensity-functional
verification ladder T0 review T1 audit T2 compute T3 formal T4 reserved
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We present a first-principles study of the temperature- and density-dependent intrinsic electrical resistivity of graphene. We use density-functional theory and density-functional perturbation theory together with very accurate Wannier interpolations to compute all electronic and vibrational properties and electron-phonon coupling matrix elements; the phonon-limited resistivity is then calculated within a Boltzmann-transport approach. An effective tight-binding model, validated against first-principles results, is also used to study the role of electron-electron interactions at the level of many-body perturbation theory. The results found are in excellent agreement with recent experimental data on graphene samples at high carrier densities and elucidate the role of the different phonon modes in limiting electron mobility. Moreover, we find that the resistivity arising from scattering with transverse acoustic phonons is 2.5 times higher than that from longitudinal acoustic phonons. Last, high-energy, optical, and zone-boundary phonons contribute as much as acoustic phonons to the intrinsic electrical resistivity even at room temperature and become dominant at higher temperatures.

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