This study shows that initial atomic velocities as given by thermodynamics play an important role in the dynamics of phase transitions. We tracked the atomic motion during non-thermal laser-induced melting of InSb at different initial temperatures. The ultrafast atomic motion following bond breaking can in general be governed by two mechanisms: the random velocity of the atoms at the time of bond breaking (inertial model), and the forces acting on the atoms after bond breaking. The melting dynamics was found to follow the inertial model over a wide temperature range.

中文翻译：

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非平衡激光诱导熔化过程中热平衡动力学在原子运动中的作用

这项研究表明，由热力学给出的初始原子速度在相变动力学中起着重要作用。我们跟踪了在不同初始温度下非热激光诱导的InSb熔化过程中的原子运动。断裂键之后的超快原子运动通常可以通过两种机制控制：断裂键时原子的随机速度（惯性模型）和断裂键后作用在原子上的力。发现在宽温度范围内，熔融动力学遵循惯性模型。