Spontaneous spin polarization in doped semiconductor quantum wells
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 experimen...
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todo:paper_14346028_v45_n1_p9_Juri2023-10-03T16:14:32Z Spontaneous spin polarization in doped semiconductor quantum wells Juri, L.O. Tamborenea, P.I. 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 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. JOUR info:eu-repo/semantics/openAccess http://creativecommons.org/licenses/by/2.5/ar http://hdl.handle.net/20.500.12110/paper_14346028_v45_n1_p9_Juri |
| institution |
Universidad de Buenos Aires |
| institution_str |
I-28 |
| repository_str |
R-134 |
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Biblioteca Digital - Facultad de Ciencias Exactas y Naturales (UBA) |
| topic |
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 |
| spellingShingle |
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 Juri, L.O. Tamborenea, P.I. Spontaneous spin polarization in doped semiconductor quantum wells |
| topic_facet |
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 |
| description |
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. |
| format |
JOUR |
| author |
Juri, L.O. Tamborenea, P.I. |
| author_facet |
Juri, L.O. Tamborenea, P.I. |
| author_sort |
Juri, L.O. |
| title |
Spontaneous spin polarization in doped semiconductor quantum wells |
| title_short |
Spontaneous spin polarization in doped semiconductor quantum wells |
| title_full |
Spontaneous spin polarization in doped semiconductor quantum wells |
| title_fullStr |
Spontaneous spin polarization in doped semiconductor quantum wells |
| title_full_unstemmed |
Spontaneous spin polarization in doped semiconductor quantum wells |
| title_sort |
spontaneous spin polarization in doped semiconductor quantum wells |
| url |
http://hdl.handle.net/20.500.12110/paper_14346028_v45_n1_p9_Juri |
| work_keys_str_mv |
AT jurilo spontaneousspinpolarizationindopedsemiconductorquantumwells AT tamboreneapi spontaneousspinpolarizationindopedsemiconductorquantumwells |
| _version_ |
1807323962186661888 |