Title
Thermodynamics properties of copper-oxide superconductors described by an Ising frustrated model
Date Issued
15 October 2013
Access level
metadata only access
Resource Type
journal article
Author(s)
Padilha I.T.
De Sousa J.R.
Neto M.A.
Viana J.R.
Universidade Federal Do Amazonas
Publisher(s)
Elsevier B.V.
Abstract
In this work we will study the thermodynamics properties of the quenched decorated Ising model with competitive interactions through the effective field theory (EFT) of a one-spin cluster. This model is used here to describe the thermodynamics properties of the cooper-based oxide superconductors compounds in its insulating phase (antiferromagnetic). The model consists of planes in which the nodal spins interact antiferromagnetically (JA<0) with their nearest-neighbors and ferromagnetically (JF>0) with the spins that decorated the bonds, which are quenched randomly distributed over the two-dimensional lattice. The planes interact antiferromagnetically with weak exchange interaction (i.e., JA′=λJA, λ=10 -5). By using the framework of an effective-field theory, based on the differential operator technique, we discuss beyond thermodynamics properties the antiferromagnetic-phase stability limit in the temperature-decorated bond concentration space (T×p), for λ=10-5 and various values of frustration parameter (α=JA/JF), magnetic field (H) and concentration parameter (p). For certain range of the parameter α we observe a reentrant behavior in low-temperature that it reflects in the properties behavior itself. © 2013 Elsevier B.V. All rights reserved.
Start page
4897
End page
4904
Volume
392
Issue
20
Language
English
OCDE Knowledge area
Física y Astronomía Física de partículas, Campos de la Física
Scopus EID
2-s2.0-84883135048
Source
Physica A: Statistical Mechanics and its Applications
ISSN of the container
03784371
Sponsor(s)
We wish to thank the Brazilian Research Agencies , CNPq , FAPEAM and CAPES for financial support for this work.
Sources of information: Directorio de Producción Científica Scopus