Abstract

The paper investigates the attenuation of specular phonon reflection from rough boundaries in single-layer graphene. It compares the Ogilvy formula and related roughness-scattering expressions with atomistic Green’s function simulations over an ensemble of rough boundaries, analyzing the effects of phonon dispersion, incident angle, polarization, mode conversion, and correlation length. The results identify regimes where the Ogilvy formula is accurate and discuss a large-correlation-length short-wavelength limit with a minimum specularity approximately p0 exp(-pi²/4).

Abstract

The paper investigates the attenuation of specular phonon reflection from rough boundaries in single-layer graphene. It compares the Ogilvy formula and related roughness-scattering expressions with atomistic Green’s function simulations over an ensemble of rough boundaries, analyzing the effects of phonon dispersion, incident angle, polarization, mode conversion, and correlation length. The results identify regimes where the Ogilvy formula is accurate and discuss a large-correlation-length short-wavelength limit with a minimum specularity approximately p0 exp(-pi²/4).

Abstract

The paper investigates the attenuation of specular phonon reflection from rough boundaries in single-layer graphene. It compares the Ogilvy formula and related roughness-scattering expressions with atomistic Green’s function simulations over an ensemble of rough boundaries, analyzing the effects of phonon dispersion, incident angle, polarization, mode conversion, and correlation length. The results identify regimes where the Ogilvy formula is accurate and discuss a large-correlation-length short-wavelength limit with a minimum specularity approximately p0 exp(-pi²/4).

Abstract

The paper investigates the attenuation of specular phonon reflection from rough boundaries in single-layer graphene. It compares the Ogilvy formula and related roughness-scattering expressions with atomistic Green’s function simulations over an ensemble of rough boundaries, analyzing the effects of phonon dispersion, incident angle, polarization, mode conversion, and correlation length. The results identify regimes where the Ogilvy formula is accurate and discuss a large-correlation-length short-wavelength limit with a minimum specularity approximately p0 exp(-pi²/4).