Journal Article high pressure Research Support, Non-U.S. Gov't Research Support, U.S. Gov't, Non-P.H.S. conductivity enhanced photo responsiveness high-pressure induced amorphization, recrystallization insulating state iron-pnictides lattice distortion layered materials low temperature nuclear resonant scattering organic-inorganic halide perovskites phase decomposition phonon density of states phonon-modulated superconductivity photoluminescence pressure stability structural transition superconductivity enhancement