2024-03-29T15:48:47Zhttp://digital.csic.es/dspace-oai/requestoai:digital.csic.es:10261/508552016-02-17T08:39:42Zcom_10261_115com_10261_3col_10261_368
Spin-polarized half-metallic state of a ferromagnetic δ layer in a semiconductor host
Caprara, S.
Tugushev, V. V.
Chulkov, Eugene V.
We discuss a model which is apt to describe the appearance of a spin-polarized half-metallic state around a single δ layer of a magnetic transition metal embedded into a nonmagnetic semiconductor host. We show that ferromagnetism in this system can be attributed to the intrinsic physical properties of the δ layer. The relevant physical effects described by our model are the hybridization of the electron states of the metal and semiconductor atoms, the charge redistribution around the δ layer, and the electron-electron correlation on a metal atom, which is the driving force of ferromagnetism. We obtain the mean-field phase diagram of the model at zero and finite temperature, both in the case when the chemical potential is fixed, and when the density of particles on the δ layer is fixed. The relevance of our results in connection with numerical and experimental results on the so-called digital magnetic heterostructures, in the absence and in the presence of a quantum-well carrier channel, is eventually discussed. © 2011 American Physical Society.
Peer Reviewed
2012-06-05T11:59:48Z
2012-06-05T11:59:48Z
2011
2012-06-05T11:59:48Z
artículo
http://purl.org/coar/resource_type/c_6501
doi: 10.1103/PhysRevB.84.085311
issn: 1098-0121
Physical Review B 84(8): 085311 (2011)
http://hdl.handle.net/10261/50855
10.1103/PhysRevB.84.085311
en
open
American Physical Society