Spin-glass dynamics in the presence of a magnetic field: exploration of microscopic properties

Paga, I. ; Zhai, Q. ; Baity-Jesi, M. ; Calore, E. ; Cruz, A. (Universidad de Zaragoza) ; Fernández, L. A. ; Gil-Narvion, J. M. ; González-Adalid Pemartin, I. ; Gordillo Guerrero, A. ; Iñiguez, D. ; Maiorano, A. ; Marinari, E. ; Martin-Mayor, V. ; Moreno-Gordo, J. (Universidad de Zaragoza) ; Muñoz-Sudupe, A. ; Navarro, D. (Universidad de Zaragoza) ; Orbach, R. L. ; Parisi, G. ; Pérez-Gaviro, S. (Universidad de Zaragoza) ; Ricci-Tersenghi, F. ; Ruiz Lorenzo, J. J. ; Schifano, S. F. ; Schlagel, D. L. ; Seoane, B. ; Tarancón, A. (Universidad de Zaragoza) ; Tripiccione, R. ; Yllanes, D.

Resumen: The synergy between experiment, theory, and simulations enables a microscopic analysis of spin-glass dynamics in a magnetic field in the vicinity of and below the spin-glass transition temperature T g. The spin-glass correlation length, ¿(t, t w; T), is analysed both in experiments and in simulations in terms of the waiting time t w after the spin glass has been cooled down to a stabilised measuring temperature T < T g and of the time t after the magnetic field is changed. This correlation length is extracted experimentally for a CuMn 6 at. % single crystal, as well as for simulations on the Janus II special-purpose supercomputer, the latter with time and length scales comparable to experiment. The non-linear magnetic susceptibility is reported from experiment and simulations, using ¿(t, t w; T) as the scaling variable. Previous experiments are reanalysed, and disagreements about the nature of the Zeeman energy are resolved. The growth of the spin-glass magnetisation in zero-field magnetisation experiments, M ZFC(t, t w; T), is measured from simulations, verifying the scaling relationships in the dynamical or non-equilibrium regime. Our preliminary search for the de Almeida-Thouless line in D = 3 is discussed.

Idioma: Inglés

DOI: 10.1088/1742-5468/abdfca

Año: 2021

Publicado en: Journal of Statistical Mechanics: Theory and Experiment 2021, 3 (2021), 033301 [49 pp.]
ISSN: 1742-5468

Factor impacto JCR: 2.234 (2021)

Categ. JCR: PHYSICS, MATHEMATICAL rank: 15 / 56 = 0.268 (2021) - Q2 - T1
Categ. JCR: MECHANICS rank: 86 / 138 = 0.623 (2021) - Q3 - T2

Factor impacto CITESCORE: 3.9 - Mathematics (Q1) - Physics and Astronomy (Q2) - Decision Sciences (Q2)

Factor impacto SCIMAGO: 0.429 - Statistics and Probability (Q3) - Statistical and Nonlinear Physics (Q3)

Financiación: info:eu-repo/grantAgreement/EC/H2020/694925/EU/Low Temperature Glassy Systems/LoTGlasSy
Financiación: info:eu-repo/grantAgreement/ES/MCIU/FPU18/02665
Financiación: info:eu-repo/grantAgreement/ES/MINECO-AEI-FEDER/PGC2018-094684-B-C21
Financiación: info:eu-repo/grantAgreement/ES/MINECO-AEI-FEDER/PGC2018-094684-B-C22
Financiación: info:eu-repo/grantAgreement/ES/MINECO-AEI-FEDER/PID2019-103939RB-I00
Financiación: info:eu-repo/grantAgreement/ES/MINECO/FIS2016-76359-P

Tipo y forma: Article (PrePrint)

Área (Departamento): Área Tecnología Electrónica (Dpto. Ingeniería Electrón.Com.)
Área (Departamento): Área Física Teórica (Dpto. Física Teórica)