标题： 1T-TaS_{2-x}Se_{x}中隐藏电荷密度波态的光创建和温度稳定性 显示英文标题

标题： Optical creation and temperature stability of the hidden charge density wave state in 1T-TaS_{2-x}Se_{x}

摘要： 飞秒瞬态光学光谱技术被用于研究单晶1$T$-TaS$_{2-x}$Se$_{x}$中平衡态和隐藏亚稳电荷密度波态的弛豫动力学，作为硒掺杂$x$的函数。 与原始的1$T$-TaS$_{2}$相似，在低温下经过单个50~fs激光脉冲淬火后，在共格莫特相中观察到隐藏相的转变，直到$x=0.6$。 光致隐藏相的形成伴随着相干声子谱的显著变化，特别是集体振幅模。 尽管隐藏相在温度升高时的稳定性仅与硒含量略有关系，但隐藏相的生成阈值通量随着硒含量从1增加到$\sim4$ mJ/cm$^{2}$而显著增加。 显示英文摘要

摘要： The femtosecond transinet optical spectroscopy is employed to study the relaxation dynamics of the equilibrium and hidden metastable charge-density-wave states in single crystals of 1$T$-TaS$_{2-x}$Se$_{x}$ as a function of the Se doping $x$. Similarly to pristine 1$T$-TaS$_{2}$, the transition to a hidden phase is observed at low temperature after a quench with a single 50~fs laser pulse, in the commensurate Mott phase up to $x=0.6$. The photo-induced hidden-phase formation is accompanied by a notable change in the coherent phonon spectra, and particularly the collective amplitude mode. While the stability of the hidden phase with increased temperatures is only slightly dependent of the Se content the hidden-phase creation-treshold fluence strongly increases with the Se content from 1 to $\sim4$ mJ/cm$^{2}$.