论文标题
$ \ mathrm {mote_2} $中的照片诱导的tellurium隔离
Photo-induced Tellurium segregation in $\mathrm{MoTe_2}$
论文作者
论文摘要
我们使用飞秒脉冲激光器报告了多态性$ \ MATHRM {MOTE_2} $单晶的相干声子光谱，以研究结构相变和光热激光激发引起的结构相变效应之间的关系。即使使用了飞秒脉冲激光，通常诱导的热积累效应比CW激光器的情况更少，但在相干的声子光谱中观察到trinurium隔离，激发密度越来越高，而在$ \ mathrm {mote_2} $中没有结构相位过渡，而结构相过渡则没有。然而，发现使用较高的光子能激发可以抑制柜子隔离。
We report on the coherent phonon spectroscopy of polymorphic $\mathrm{MoTe_2}$ single crystals using a femtosecond-pulsed laser to investigate the relationship between structural phase transitions and photo-thermal effects induced by high-density laser excitation. Even when a femtosecond pulsed laser was used, which generally induces fewer heat accumulation effects than the case for a CW laser, tellurium segregation was observed in coherent phonon spectra with increasing excitation density, while no structural phase transition among polymorphs of $\mathrm{MoTe_2}$ was observed. The use of higher photon-energy excitation, however, was found to suppress tellurium segregation.
