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arXiv · 1704.07777

Matching microscopic and macroscopic responses in glasses

Janus Collaboration·M. Baity-Jesi·E. Calore·A. Cruz·L. A. Fernandez·J. M. Gil-Narvion·A. Gordillo-Guerrero·D. Iñiguez·A. Maiorano·E. Marinari·V. Martin-Mayor·J. Monforte-Garcia·A. Muñoz-Sudupe·D. Navarro·G. Parisi·S. Perez-Gaviro·F. Ricci-Tersenghi·J. J. Ruiz-Lorenzo·S. F. Schifano·B. Seoane·A. Tarancon·R. Tripiccione·D. Yllanes
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Abstract

We first reproduce on the Janus and Janus II computers a milestone experiment that measures the spin-glass coherence length through the lowering of free-energy barriers induced by the Zeeman effect. Secondly we determine the scaling behavior that allows a quantitative analysis of a new experiment reported in the companion Letter [S. Guchhait and R. Orbach, Phys. Rev. Lett. 118, 157203 (2017)]. The value of the coherence length estimated through the analysis of microscopic correlation functions turns out to be quantitatively consistent with its measurement through macroscopic response functions. Further, non-linear susceptibilities, recently measured in glass-forming liquids, scale as powers of the same microscopic length.

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Janus Collaboration, M. Baity-Jesi, E. Calore, A. Cruz, L. A. Fernandez, J. M. Gil-Narvion, A. Gordillo-Guerrero, D. Iñiguez, A. Maiorano, E. Marinari, V. Martin-Mayor, J. Monforte-Garcia, A. Muñoz-Sudupe, D. Navarro, G. Parisi, S. Perez-Gaviro, F. Ricci-Tersenghi, J. J. Ruiz-Lorenzo, S. F. Schifano, B. Seoane, A. Tarancon, R. Tripiccione, D. Yllanes. 2017-04-25. Matching microscopic and macroscopic responses in glasses. https://doi.org/10.1103/physrevlett.118.157202

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