Nuclear Spin Ferromagnetic Phase Transition in an Interacting Two Dimensional Electron Gas

Pascal Simon and Daniel Loss
Phys. Rev. Lett. 98, 156401 – Published 9 April 2007

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 mK range with decreasing electron density.

  • Received 10 November 2006

DOI:https://doi.org/10.1103/PhysRevLett.98.156401

©2007 American Physical Society

Authors & Affiliations

Pascal Simon1,2 and Daniel Loss1

  • 1Department of Physics and Astronomy, University of Basel, Klingelbergstrasse 82, CH-4056 Basel, Switzerland
  • 2Laboratoire de Physique et Modélisation des Milieux Condensés, CNRS and Université Joseph Fourier, BP 166, 38042 Grenoble, France

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Issue

Vol. 98, Iss. 15 — 13 April 2007

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