Nuclear spin ferromagnetic phase transition in an interacting 2D electron gas
arXiv:cond-mat/0611292 · doi:10.1103/PhysRevLett.98.156401
Abstract
Electrons in a two-dimensional semiconducting heterostructure interact with nuclear spins via the hyperfine interaction. Using a a Kondo lattice formulation of the electron-nuclear spin interaction, we show that the nuclear spin system within an interacting two-dimensional electron gas undergoes a ferromagnetic phase transition at finite temperatures. We find that electron-electron interactions and non-Fermi liquid behavior substantially enhance the nuclear spin Curie temperature into the range with decreasing electron density.
4.1 pages
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