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http://hdl.handle.net/11154/1978
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Title: | Magnetic character of the two-dimensional electron gas |
Authors: | Orozco, S Mendez-Moreno, R Moreno, M |
Issue Date: | 2001 |
Abstract: | The energies of the paramagnetic and ferromagnetic states of the two-dimensional electron gas are evaluated and compared in order to determine the magnetic character of the ground state. The calculations are made with the self-consistent Hartree-Fock approximation and the deformable jellium model. Several transition points between different magnetic phases are obtained. At very high densities of r(s) approximate to 2 a first transition is obtained from a paramagnetic fluid to a ferromagnetic one. At r(st1) approximate to 4.8 a symmetry and magnetic transition is obtained from a ferromagnetic fluid to a paramagnetic localized state with a periodic density centered on a hexagonal lattice. A ferromagnetic localized state is predicted at lower densities. The results are compared with those reported for the system with square symmetry. (C) 2001 Elsevier Science Ltd. All rights reserved. |
URI: | http://hdl.handle.net/11154/1978 |
ISSN: | 0038-1098 |
Appears in Collections: | Física
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