Thermal resistance at a liquid-solid interface dependent on the ratio of thermal oscillation frequencies

► Interface thermal resistance (Kapitza length) is observed in the molecular dynamics simulations. ► This work is a first theoretical analysis using simple vibrational system for the interface. ► Interfacial thermal resistance is a function of the 4th power of the thermal frequency ratio. ► The response of the molecular interface is related with the interfacial stiffness.