Continuum approach for long-wavelength acoustic phonons in quasi-two-dimensional structures
Continuum approach for long-wavelength acoustic phonons in quasi-two-dimensional structures
As an alternative to atomistic calculations of long-wavelength acoustic modes of atomically thin layers, which are known to converge very slowly, we propose a quantitatively predictive and physically intuitive approach based on continuum elasticity theory. We describe a layer, independent of its thickness, by a membrane and characterize its elastic …