|
Título:
|
Spin-glass ordering in diluted magnetic semiconductors: A Monte Carlo study
|
|
Autores:
|
Marinari, E. ;
Martín Mayor, Víctor ;
Pagnani, A.
|
|
Tipo de documento:
|
texto impreso
|
|
Editorial:
|
American Physical Society, 2000-08-15
|
|
Dimensiones:
|
application/pdf
|
|
Nota general:
|
info:eu-repo/semantics/openAccess
|
|
Idiomas:
|
|
|
Palabras clave:
|
Estado = Publicado
,
Materia = Ciencias: Física: Física-Modelos matemáticos
,
Tipo = Artículo
|
|
Resumen:
|
We study the temperature-dilution phase diagram of a site-diluted Heisenberg antiferromagnet on a facecertered-cubic lattice, with and without the Dzyaloshinskii-Moriya anisotropic term, fixed to realistic microscopic parameters for IIB_(1-x)Mn_(x)Te(IIB=Cd,Hg,Zn). We show that the dipolar Dzyaloshinskii-Moriya anisotropy induces a finite-temperature phase transition to a spin-glass phase, at dilutions larger than 80%. The resulting probability distribution of the order parameter P(q) is similar to the one found in the cubic lattice Edwards-Anderson-Ising model. The critical exponents undergo large finite-size corrections, but tend to values similar to the ones of the Edwards-Anderson-Ising model.
|
|
En línea:
|
https://eprints.ucm.es/46808/1/Mart%C3%ADnMayorV%20LIBRE%2030.pdf
|
