Calculated phonon modes, infrared and Raman spectra in orthorhombic $\alpha$-MoO${}_3$ and monolayer MoO${}_3$

Amol Ratnaparkhe, Santosh Kumar Radha, Walter R. L. Lambrecht

Orhorhombic $\alpha$-MoO${}_3$ is a layered oxide with various applications and with excellent potential to be exfoliated as a 2D ultrathin film or monolayer. In this paper, we present a…