Dynamics of photoinduced Charge Density Wave-metal phase transition in K0.3MoO3

摘要

We present first systematic studies of the photoinduced phase transition fromthe ground charge density wave (CDW) state to the normal metallic (M) state inthe prototype quasi-1D CDW system K0.3MoO3. Ultrafast non-thermal CDW meltingis achieved at the absorbed energy density that corresponds to the electronicenergy difference between the metallic and CDW states. The results imply thaton the sub-picosecond timescale when melting and subsequent initial recovery ofthe electronic order takes place the lattice remains unperturbed.