Ferromagnetic clusters induced by a nonmagnetic random disorder in diluted magnetic semiconductors
| Autor: | Dinh-Hoi Bui, Van-Nham Phan |
|---|---|
| Rok vydání: | 2016 |
| Předmět: |
Physics
Condensed matter physics Dopant General Physics and Astronomy 02 engineering and technology Magnetic semiconductor Condensed Matter::Mesoscopic Systems and Quantum Hall Effect 021001 nanoscience & nanotechnology Condensed Matter::Disordered Systems and Neural Networks 01 natural sciences Condensed Matter::Materials Science Paramagnetism Dynamical mean field theory Ferromagnetism Lattice (order) 0103 physical sciences Condensed Matter::Strongly Correlated Electrons 010306 general physics 0210 nano-technology Randomness |
| Zdroj: | Annals of Physics. 375:313-321 |
| ISSN: | 0003-4916 |
| DOI: | 10.1016/j.aop.2016.10.004 |
| Popis: | In this work, we analyze the nonmagnetic random disorder leading to a formation of ferromagnetic clusters in diluted magnetic semiconductors. The nonmagnetic random disorder arises from randomness in the host lattice. Including the disorder to the Kondo lattice model with random distribution of magnetic dopants, the ferromagnetic–paramagnetic transition in the system is investigated in the framework of dynamical mean-field theory. At a certain low temperature one finds a fraction of ferromagnetic sites transiting to the paramagnetic state. Enlarging the nonmagnetic random disorder strength, the paramagnetic regimes expand resulting in the formation of the ferromagnetic clusters. |
| Databáze: | OpenAIRE |
| Externí odkaz: |
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