Abstract

The lattice thermal conductivity of graphene is evaluated using a microscopic model that accounts for discrete lattice effects and phonon dispersion across the Brillouin zone. The Boltzmann transport equation is solved iteratively within a three-phonon interaction framework, treating normal and Umklapp collisions rigorously without relaxation-time or long-wavelength approximations. The study analyzes temperature-, frequency-, and crystallite-size-dependent thermal conductivity and highlights the dominant role of out-of-plane acoustic phonons in graphene thermal transport.

Abstract

The lattice thermal conductivity of graphene is evaluated using a microscopic model that accounts for discrete lattice effects and phonon dispersion across the Brillouin zone. The Boltzmann transport equation is solved iteratively within a three-phonon interaction framework, treating normal and Umklapp collisions rigorously without relaxation-time or long-wavelength approximations. The study analyzes temperature-, frequency-, and crystallite-size-dependent thermal conductivity and highlights the dominant role of out-of-plane acoustic phonons in graphene thermal transport.

Abstract

The lattice thermal conductivity of graphene is evaluated using a microscopic model that accounts for discrete lattice effects and phonon dispersion across the Brillouin zone. The Boltzmann transport equation is solved iteratively within a three-phonon interaction framework, treating normal and Umklapp collisions rigorously without relaxation-time or long-wavelength approximations. The study analyzes temperature-, frequency-, and crystallite-size-dependent thermal conductivity and highlights the dominant role of out-of-plane acoustic phonons in graphene thermal transport.

Abstract

The lattice thermal conductivity of graphene is evaluated using a microscopic model that accounts for discrete lattice effects and phonon dispersion across the Brillouin zone. The Boltzmann transport equation is solved iteratively within a three-phonon interaction framework, treating normal and Umklapp collisions rigorously without relaxation-time or long-wavelength approximations. The study analyzes temperature-, frequency-, and crystallite-size-dependent thermal conductivity and highlights the dominant role of out-of-plane acoustic phonons in graphene thermal transport.