Spontaneous Magnetization of a Two-Dimensional Electron Gas

Details Spontaneous Magnetization of a Two-Dimensional Electron Gas Spontaneous Magnetization of a Two-Dimensional Electron Gas

2001-05-18

arxiv.org/abs/cond-mat/0105361v1

Physics

Condensed Matter

Strongly Correlated Electrons

5 pages, 1 figure

Scientific paper

Spontaneous magnetization of a two-dimensional electron gas (2DEG) is discussed. It takes place for sufficiently high electron density (i.e. for a quantum fluid state) with $r_s<10$ which is quite beyond the condition of Wigner crystallization $(r_s>37)$ obtained by Tanatar and Ceperley. The effect essentially depends upon screening and disorder . The energy interval under the Fermi level where a spin polarization occurs as a function of electron density is computed. The spontaneous magnetic moment and a decrease of electron density of states (pseudo-gap) at the Fermi level are found.

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