Publication: Matching microscopic and macroscopic responses in glasses
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2017-04-13
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American Physical Society
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Abstract
We first reproduce on the Janus and Janus II computers a milestone experiment that measures the spinglass 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, nonlinear susceptibilities, recently measured in glass-forming liquids, scale as powers of the same microscopic length.
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© 2017 American Physical Society. Artículo firmado por 22 autores. We warmly thank Ray Orbach and Samaresh Guchhait for sharing with us their data prior to publication [22], and for a most fruitful exchange of ideas. We thank the staff of BIFI supercomputing center for their assistance. We thank M. Pivanti for his contribution in the early stages of the development of the Janus II computer. We also thank Link Engineering (Bologna, Italy) for its crucial role in the technical aspects related to the construction of Janus II. We thank EU, Government of Spain and Government of Aragon for the financial support Fonds Européen de Développement Régional (FEDER) of Janus II’s development. This work was partially supported by Ministerio de Economía, Industria y Competitividad (MINECO) (Spain) through Grants No. FIS2012-35719-C02, No. FIS2013- 42840-P, No. FIS2015-65078-C2, No. FIS2016-76359-P, and No. TEC2016-78358-R, by the Junta de Extremadura (Spain) through Grant No. GRU10158 (partially funded by FEDER) and by the DGA-FSE (Diputación General de Aragón–Fondo Social Europeo). This project has received funding from the European Union’s Horizon 2020 research and innovation program under the Marie Skłodowska Curie Grant No. 654971. This project has received funding from the European Research Council (ERC) under the European Union’s Horizon 2020 research and innovation program (Grant No. 694925). D. Y. acknowledges support by Grant No. NSF-DMR-305184 and by the Soft Matter Program at Syracuse University. M. B. J. acknowledges financial support from ERC Grant No. NPRGGLASS.