  Atomic undercoordination, charge injection, mechanical and thermal activation
mediate the properties of a material intrinsically by bond relaxation from one
equilibrium to another while the phonon spectrometrics probes the
ever-unexpected information of the binding energy density, atomic cohesive
energy, single bond force constant, crystal elastic modulus, Debye temperature
and the abundance-length-stiffness transition of bonds under perturbation.
