标题： 打破导线：临界长度对银纳米线熔化路径的影响 显示英文标题

标题： Breaking the wire: the impact of critical length on melting pathways in silver nanowires

摘要： 我们通过分子动力学模拟和理论建模探索银纳米线的熔化机制，其中我们观察到两种不同的机制或路径出现，这些机制决定了固-液界面在相变过程中如何熔化。 对于长度超过临界长度（$L>L_{\textrm{crit}}$）的纳米线，一种阿伦尼乌斯型扩散模型成功预测了固-液界面速度，突出了扩散驱动的熔化路径。 相反，长度短于临界长度（$L\leq L_{\textrm{crit}}$）的纳米线表现出由非平衡效应驱动的独特行为，包括固体核心的快速过热、固-液界面的稳定以及高能密度的显著影响。 这些机制导致熔化加速和不同的相变动力学。 我们的研究结果揭示了几何结构和纳米尺度效应如何关键地塑造熔化行为，为先进应用中纳米结构的设计和稳定性提供了见解。 显示英文摘要

摘要： We explore the melting mechanisms of silver nanowires through molecular dynamics simulations and theoretical modelling, where we observe that two distinct mechanisms or pathways emerge that dictate how the solid-liquid interface melts during the phase transition. For wires longer than a critical length ($L>L_{\textrm{crit}}$), an Arrhenius-type diffusion model successfully predicts the solid-liquid interface velocity, highlighting diffusion-driven melting pathways. In contrast, wires shorter than the critical length ($L\leq L_{\textrm{crit}}$) exhibit unique behaviours driven by non-equilibrium effects, including rapid overheating of the solid core, stabilization of the solid-liquid interface, and the pronounced impact of higher energy densities. These mechanisms lead to accelerated melting and distinct phase transition dynamics. Our findings reveal how geometry and nanoscale effects critically shape melting behaviour, offering insights for the design and stability of nanostructures in advanced applications.