Such a membrane system with negative mass density has been applied to realize sound absorbers [24–29]. 2.2 Negative bulk modulus The property of bulk modulus indicates how the material resists to an external pressure, which is given by [Math Processing Error]ΔP=−BΔVV (7) where ΔP...
Broad-based interest in microscale heat transport in novel materials, engineered phononic materials, metamaterials, and their relevant systems has created significant demand for computational approaches to aid in investigation and design of materials that support phonons. This review describes the significant...