Angelini Maria Chiara, Biroli Giulio
Institut de Physique Théorique, CEA/DSM/IPhT-CNRS/URA 2306 CEA-Saclay, F-91191 Gif-sur-Yvette, France.
Phys Rev Lett. 2015 Mar 6;114(9):095701. doi: 10.1103/PhysRevLett.114.095701. Epub 2015 Mar 4.
By using real-space renormalization group (RG) methods, we show that spin glasses in a field display a new kind of transition in high dimensions. The corresponding critical properties and the spin-glass phase are governed by two nonperturbative zero-temperature fixed points of the RG flow. We compute the critical exponents and discuss the RG flow and its relevance for three-dimensional systems. The new spin-glass phase we discovered has unusual properties, which are intermediate between the ones conjectured by droplet and full replica symmetry-breaking theories. These results provide a new perspective on the long-standing debate about the behavior of spin glasses in a field.
通过使用实空间重整化群（RG）方法，我们表明处于外场中的自旋玻璃在高维中呈现出一种新型转变。相应的临界性质和自旋玻璃相由RG流的两个非微扰零温不动点所决定。我们计算了临界指数，并讨论了RG流及其与三维系统的相关性。我们发现的新自旋玻璃相具有不寻常的性质，它介于液滴理论和完全复制对称破缺理论所推测的性质之间。这些结果为关于处于外场中的自旋玻璃行为的长期争论提供了一个新视角。
