Quench dynamics in spin crossover induced by high pressure
  In this paper we have studied analytically and numerically dynamics of spin crossover induced by time-dependent pressure. We show that quasi static pressure, with a slow dependence on time, yields a spin crossover leading to transition from the state of quantum system with high spin (HS) to the low spin (LS). However, a quench dynamics under shock-wave load is more complicated. The final state of the system depends on the amplitude and pulse velocity, resulting in the mixture of the HS and LS states. 
Alexander I. Nesterov and Sergey G. Ovchinnikov
cond-mat.str-el quant-ph