标题： 再生过程中胶体玻璃中热力学与动力学的解耦 显示英文标题

标题： Decoupling between thermodynamics and dynamics during rejuvenation in colloidal glasses

摘要： 我们通过热循环使老化已久的准二维二元胶体玻璃重新焕发活力，并系统地测量了在重新焕发活力过程中统计响应和粒子级结构演变。 虽然模量和玻色峰随着循环次数的增加而持续重新焕发活力，但均方位移（MSD）在不同组的热循环之间显著波动。 热力学和动力学演变之间的解耦表明，玻璃的不同体性质具有不同的微观起源。 我们发现，由热循环引发的小部分结构重排可以改变整个弹性连续体，从而导致显著的热力学重新焕发活力，而局部缺陷可以在重排附近的位置被激活和失活，伴随着显著的移动性变化，因此即使只有约10%的粒子作为快速区域，也会导致动态的波动。 我们的结果为体玻璃重新焕发活力的微观机制提供了全面的图景，这可以用于改进玻璃性能或进一步制定玻璃系统中的统计理论。 显示英文摘要

摘要： We rejuvenate well-aged quasi-2D binary colloidal glasses by thermal cycling, and systematically measure both the statistical responses and particle-level structural evolutions during rejuvenation. While the moduli and boson peak are continuously rejuvenated with increasing number of cycles, the mean square displacement (MSD) fluctuates significantly between different groups of thermal cycles. The decoupling between the thermodynamical and dynamical evolutions suggests different microscopic origins for different bulk properties of glasses. We find that a small fraction of structural rearrangements triggered by thermal cycling could alter the whole elastic continuum and lead to the significant thermodynamic rejuvenation, while localized defects could be activated and deactivated at the positions close to the rearrangements with significantly high mobility change and hence result in the fluctuated dynamics even with only about 10% of particles as fast regions. Our results offer a comprehensive picture for the microscopic mechanisms underlying bulk glass rejuvenation, which could be readily used to refine glass properties or to formulate further statistical theories in glassy systems.