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- W1499239624 abstract "In this paper we consider the degree of spin‐polarization in the ground state of a 2d electron system subject to an in‐plane magnetic field. After briefly reviewing the Hartree‐Fock results we present an analysis based on a summation of “ring” diagrams for the contribution to the correlation energy. We find that, in the “ring approximation” the system has: a high density regime in which the spin‐polarization smoothly increases from zero to unity as the field is increased; a low density ferromagnetic regime in which the electrons are fully polarized even in the absence of a field; an intermediate regime in which the polarization initially increases smoothly as the field is increased from zero but eventually meets a first order metamagnetic transition at a density dependent magnetic field. The line of metamagnetic transitions terminates at the low density end at the first order ferromagnetic transition at rs ≈ 5.5 and at the high density end at a quantum critical end‐point at rs ≈ 2.5. We speculate on the effects of correlations beyond the ring approximation." @default.
- W1499239624 created "2016-06-24" @default.
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- W1499239624 date "2007-01-01" @default.
- W1499239624 modified "2023-09-24" @default.
- W1499239624 title "Is there a metamagnetic transition in a 2d electron gas subject to an in-plane magnetic field?" @default.
- W1499239624 doi "https://doi.org/10.1063/1.2729932" @default.
- W1499239624 hasPublicationYear "2007" @default.
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