Strain tuning MoO3 vibrational and electronic properties

This work investigates the vibrational and electrical properties of molybdenum trioxide (α-MoO₃) upon tensile strain applied along different crystal directions. Using a three-point bending setup in combination with Raman spectroscopy, we report measurements of a blueshift of the Raman modes when uniaxial tensile strain is applied along the a- and c-axis to this material. Furthermore, the electrical measurements reveal an increase in resistance with strain applied along both in-plane directions. The findings from the uniaxial strain and Raman spectroscopy measurements are further confirmed by ab-initio calculations. This study provides valuable insights into the mechanical and vibrational properties of α-MoO₃ and its potential use in several applications. This study contributes to the growing body of knowledge on the properties of α-MoO₃ and lays the foundation for further exploration of its potential applications. Given MoO₃ holding the natural hyperbolic phonon polaritons, attracting significant research interest, this study has the potential to arouse the curiosity of the scientific community.