Tomeljak A, Schäfer H, Städter D, Beyer M, Biljakovic K, Demsar J
Physics Department and Center for Applied Photonics, Universität Konstanz, D-78457, Germany.
Phys Rev Lett. 2009 Feb 13;102(6):066404. doi: 10.1103/PhysRevLett.102.066404.
We present the first systematic studies of the photoinduced phase transition from the ground charge density wave (CDW) state to the normal metallic state in the prototype quasi-1D CDW system K0.3MoO3. Ultrafast nonthermal CDW melting is achieved at the absorbed energy density that corresponds to the electronic energy difference between the metallic and CDW states. The results imply that on the subpicosecond time scale when melting and subsequent initial recovery of the electronic order takes place the lattice remains unperturbed.
我们展示了对原型准一维电荷密度波（CDW）系统K0.3MoO3中从基态电荷密度波（CDW）态到正常金属态的光致相变的首次系统研究。在对应于金属态和CDW态之间电子能量差的吸收能量密度下实现了超快非热CDW熔化。结果表明，在亚皮秒时间尺度上，当发生熔化以及随后电子序的初始恢复时，晶格保持未受扰动。
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