Thermodynamic glass transition in a spin glass without time-reversal symmetry

Alvarez Baños, R. (Universidad de Zaragoza) ; Cruz, A. (Universidad de Zaragoza) ; Fernandez, L.A. ; Gil-Narvion, J.M. ; Gordillo-Guerrero, A. ; Guidetti, M. ; Iñiguez, D. ; Maiorano, A. ; Marinari, E. ; Martin-Mayor, V. ; Monforte-Garcia, J. (Universidad de Zaragoza) ; Muñoz-Sudupe, A. ; Navarro, D. (Universidad de Zaragoza) ; Parisi, G. ; Perez-Gaviro, S. ; Ruiz-Lorenzo, J.J. ; Schifano, S.F. ; Seoane, B. (Universidad de Zaragoza) ; Tarancon, A. (Universidad de Zaragoza) ; Tellez, P. ; Tripiccione, R. ; Yllanes, D.

Resumen: Spin glasses are a longstanding model for the sluggish dynamics that appear at the glass transition. However, spin glasses differ from structural glasses in a crucial feature: they enjoy a time reversal symmetry. This symmetry can be broken by applying an external magnetic field, but embarrassingly little is known about the critical behavior of a spin glass in a field. In this context, the space dimension is crucial. Simulations are easier to interpret in a large number of dimensions, but one must work below the upper critical dimension (i.e., in d < 6) in order for results to have relevance for experiments. Here we show conclusive evidence for the presence of a phase transition in a four-dimensional spin glass in a field. Two ingredients were crucial for this achievement: massive numerical simulations were carried out on the Janus special-purpose computer, and a new and powerful finite-size scaling method.

Idioma: Inglés

DOI: 10.1073/pnas.1203295109

Año: 2012

Publicado en: Proceedings of the National Academy of Sciences of the United States of America 109, 17 (2012), 6452-6456
ISSN: 0027-8424

Factor impacto JCR: 9.737 (2012)

Categ. JCR: MULTIDISCIPLINARY SCIENCES rank: 4 / 57 = 0.07 (2012) - Q1 - T1

Financiación: info:eu-repo/grantAgreement/ES/MICINN/FIS2009-12648-C03-02
Financiación: info:eu-repo/grantAgreement/ES/MICINN/FIS2010-16587
Financiación: info:eu-repo/grantAgreement/ES/MICINN/TEC2010-19207

Tipo y forma: Article (Published version)

Área (Departamento): Área Tecnología Electrónica (Dpto. Ingeniería Electrón.Com.)
Área (Departamento): Área Ingeniería Química (Dpto. Ing.Quím.Tecnol.Med.Amb.)
Área (Departamento): Área Física Teórica (Dpto. Física Teórica)