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Anharmonic properties from a generalized third-order ab initio approach: Theory and applications to graphite and graphene

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Paulatto, Lorenzo, Mauri, Francesco, Lazzeri, Michele·2013·Physical Review B

Abstract

We have implemented a generic method, based on the $2n+1$ theorem within density functional perturbation theory, to calculate the anharmonic scattering coefficients among three phonons with arbitrary wave vectors. The method is used to study the phonon broadening in graphite and graphene mono- and bilayers. The broadening of the high-energy optical branches is highly nonuniform and presents a series of sudden steps and spikes. At finite temperature, the two linearly dispersive acoustic branches TA and LA of graphene have nonzero broadening for small wave vectors. The broadening in graphite and bilayer graphene is, overall, very similar to the graphene one, the most remarkable feature being the broadening of the quasiacoustical Z-polarized branch. Finally, we study the intrinsic anharmonic contribution to the thermal conductivity of the three systems, within the single mode relaxation time approximation. We find the conductance to be in good agreement with experiments in the out-of-plane direction but underestimate by a factor 2 in-plane.

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Metadata

Authors
Paulatto, L., Mauri, F., & Lazzeri, M.
Venue
Physical Review B
Published
2013-06-07
Volume
87
Issue
21
ISSN
  • 1098-0121 (ISSN-L)
  • 1550-235X
OpenAlex
W2033666799
Cited by
233
References
4
FWCI
7.40
Type
journal article
Language
en
Open access
green

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CoChat. (2026). Citation check: Anharmonic properties from a generalized third-order ab initio approach: Theory and applications to graphite and graphene. https://app.cochat.ai/papers/10.1103/physrevb.87.214303
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Paulatto, L., Mauri, F., & Lazzeri, M. (2013). Anharmonic properties from a generalized third-order ab initio approach: Theory and applications to graphite and graphene. Physical Review B. https://doi.org/10.1103/physrevb.87.214303

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