Universidad Complutense de Madrid
E-Prints Complutense

Soft Modes, Localization, and Two-Level Systems in Spin Glasses

Impacto

Downloads

Downloads per month over past year

Baity Jesi, Marco and Martín Mayor, Víctor and Parisi, G. and Pérez Gaviro, S. (2015) Soft Modes, Localization, and Two-Level Systems in Spin Glasses. Physical Review Letters, 115 (26). ISSN 0031-9007

[img]
Preview
PDF
430kB

Official URL: http://dx.doi.org/10.1103/PhysRevLett.115.267205


URLURL Type
http://journals.aps.orgPublisher


Abstract

In the three-dimensional Heisenberg spin glass in a random field, we study the properties of the inherent structures that are obtained by an instantaneous cooling from infinite temperature. For a not too large field the density of states g(ω) develops localized soft plastic modes and reaches zero as ω^4 (for large fields a gap appears). When we perturb the system adding a force along the softest mode, one reaches very similar minima of the energy, separated by small barriers, that appear to be good candidates for classical two-level systems.


Item Type:Article
Additional Information:

© 2015 American Physical Society (APS).
We were supported by the European Research Council under the European Unions Seventh Framework Programme (FP7/2007-2013, ERC Grant Agreement No. 247328). We were partially supported by MINECO, Spain, through the research contract No. FIS2012-35719-C02. This work was partially supported by the GDRE 224 CNRS-INdAM GREFI-MEFI. M. B.-J. was supported by the FPU program (Ministerio de Educación, Spain). The authors thankfully acknowledge the resources from the supercomputer “Memento,” and the technical expertise and assistance provided by BIFI-ZCAM (Universidad de Zaragoza).

Uncontrolled Keywords:Physics, Multidisciplinary
Subjects:Sciences > Physics
ID Code:35676
Deposited On:12 Feb 2016 15:30
Last Modified:18 Oct 2019 14:57

Origin of downloads

Repository Staff Only: item control page