Spin-glass ordering in diluted magnetic semiconductors: A Monte Carlo study
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 Dzyaloshi...
| Autores: | , , |
|---|---|
| Tipo de recurso: | artículo |
| Fecha de publicación: | 2000 |
| País: | España |
| Institución: | Universidad Complutense de Madrid (UCM) |
| Repositorio: | Docta Complutense |
| Idioma: | inglés |
| OAI Identifier: | oai:docta.ucm.es:20.500.14352/60328 |
| Acceso en línea: | https://hdl.handle.net/20.500.14352/60328 |
| Access Level: | acceso abierto |
| Palabra clave: | 53 Antiferromagnetic RP(2) model 3 dimensions Computer-simulation Critical exponents Ising-model Cd(1-x)Mn(x)Te Dynamics Cd(0.6)Mn(0.4)Te Zn(1-x)Mn(x)Te. Física-Modelos matemáticos |
| Sumario: | 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. |
|---|