Semilinear response

Semilinear response refers to a specific type of physical response of a system, where the response to an external field or influence is nonlinear but can be analyzed in a linearized manner around an equilibrium point. The term is often used in various fields, including condensed matter physics, materials science, and nonlinear dynamics. In semilinear response scenarios, the system exhibits linear behavior in response to small perturbations, but as the perturbation increases, the system's response can become nonlinear.