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Ideal glass transitions by random pinning

机译:通过随机固定实现理想的玻璃化转变

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摘要

We study the effect of freezing the positions of a fraction c of particles from an equilibrium configuration of a supercooled liquid at a temperature T. We show that within the random first-order transition theory pinning particles leads to an ideal glass transition for a critical fraction c=c_K(T) even for moderate supercooling; e.g., close to the Mode-Coupling transition temperature. First we derive the phase diagram in the T-c plane by mean field approximations. Then, by applying a real-space renormalization group method, we obtain the critical properties for |c - c_K(T)| → 0, in particular the divergence of length and time scales, which are dominated by two zero-temperature fixed points. We also show that for c- c_K(T) the typical distance between frozen particles is related to the static point-to-set length scale of the unconstrained liquid. We discuss what are the main differences when particles are frozen in other geometries and not from an equilibrium configuration. Finally, we explain why the glass transition induced by freezing particles provides a new and very promising avenue of research to probe the glassy state and ascertain, or disprove, the validity of the theories of the glass transition.
机译:我们研究了在温度T下冻结过冷液体平衡构型中粒子级分c的位置的影响。我们表明,在随机一阶转变理论中,固定粒子会导致临界级分的理想玻璃化转变即使对于中等的过冷,c = c_K(T);例如,接近模式耦合转变温度。首先,我们通过平均场近似得出T-c平面中的相位图。然后,通过应用实空间重归一化组方法,我们获得| c-c_K(T)|的临界性质。 →0,特别是长度和时间标度的差异,这由两个零温度固定点决定。我们还表明,对于c- c_K(T),冷冻颗粒之间的典型距离与无约束液体的静态点对点长度尺度有关。我们讨论了将粒子冻结在其他几何形状而不是从平衡构型冻结时的主要区别是什么。最后,我们解释了为什么由冻结粒子引起的玻璃化转变为研究玻璃态并确定或证明玻璃化转变理论的有效性提供了一个新的,非常有前途的研究途径。

著录项

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  • 作者单位

    Institut de Physique Theorique, Commissariat a I'energie atomique et aux energies alternatives (CEA), and Centre National de la Recherche Scientifique (CNRS) Unite de Recherche Associee 2306, 91191 Gif-sur-Yvette, France,Laboratoire de Physique Theorique de la Matiere Condensee Unite Mixte de Recherche CNRS 7600 4, Place Jussieu, 75252 Paris Cedex 05, France;

    Institut de Physique Theorique, Commissariat a I'energie atomique et aux energies alternatives (CEA), and Centre National de la Recherche Scientifique (CNRS) Unite de Recherche Associee 2306, 91191 Gif-sur-Yvette, France;

  • 收录信息 美国《科学引文索引》(SCI);美国《生物学医学文摘》(MEDLINE);美国《化学文摘》(CA);
  • 原文格式 PDF
  • 正文语种 eng
  • 中图分类
  • 关键词

    glass materials; amorphous order; slow dynamics; ideal glass phase; thermodynamic phase transition;

    机译:玻璃材料;非晶阶缓慢的动力;理想玻璃相热力学相变;

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