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Abstract:

We calculate the critical density of the zero-temperature, first-order ferromagnetic phase transition in n-doped GaAs/AlGaAs quantum wells. We predict that this transition could be observed in narrow quantum wells at electron densities somewhat lower than the ones that have been considered experimentally thus far, and that there exists an upper limit for the well width beyond which there would be no transition as long as only one subband is populated. Our calculations are done within a screened Hartree-Fock approximation with a polarization-dependent effective mass, which is adjusted to match the critical density predicted by Monte Carlo calculations for the strictly two-dimensional electron gas. © EDP Sciences, Società Italiana di Fisica, Springer-Verlag 2005.

Registro:

Documento: Artículo
Título:Spontaneous spin polarization in doped semiconductor quantum wells
Autor:Juri, L.O.; Tamborenea, P.I.
Filiación:Department of Physics Juan José Giambiagi, University of Buenos Aires, Ciudad Universitaria, Pab. I, C1428EHA Buenos Aires, Argentina
Palabras clave:Approximation theory; Carrier concentration; Diffusion; Doping (additives); Electron gas; Ferromagnetism; Monte Carlo methods; Phase transitions; Polarization; Critical density; First-order ferromagnetic phase transitions; Hartree-Fock approximation; Spontaneous spin polarization; Semiconductor quantum wells
Año:2005
Volumen:45
Número:1
Página de inicio:9
Página de fin:17
DOI: http://dx.doi.org/10.1140/epjb/e2005-00159-6
Título revista:European Physical Journal B
Título revista abreviado:Eur. Phys. J. B
ISSN:14346028
Registro:https://bibliotecadigital.exactas.uba.ar/collection/paper/document/paper_14346028_v45_n1_p9_Juri

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Citas:

---------- APA ----------
Juri, L.O. & Tamborenea, P.I. (2005) . Spontaneous spin polarization in doped semiconductor quantum wells. European Physical Journal B, 45(1), 9-17.
http://dx.doi.org/10.1140/epjb/e2005-00159-6
---------- CHICAGO ----------
Juri, L.O., Tamborenea, P.I. "Spontaneous spin polarization in doped semiconductor quantum wells" . European Physical Journal B 45, no. 1 (2005) : 9-17.
http://dx.doi.org/10.1140/epjb/e2005-00159-6
---------- MLA ----------
Juri, L.O., Tamborenea, P.I. "Spontaneous spin polarization in doped semiconductor quantum wells" . European Physical Journal B, vol. 45, no. 1, 2005, pp. 9-17.
http://dx.doi.org/10.1140/epjb/e2005-00159-6
---------- VANCOUVER ----------
Juri, L.O., Tamborenea, P.I. Spontaneous spin polarization in doped semiconductor quantum wells. Eur. Phys. J. B. 2005;45(1):9-17.
http://dx.doi.org/10.1140/epjb/e2005-00159-6