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      Effective electron-electron interactions and magnetic phase transition in a two-dimensional electron liquid

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      Author
      Asgari, R.
      Esmailian, A.
      Tanatar, Bilal
      Date
      2007
      Source Title
      Solid State Communications
      Print ISSN
      0038-1098
      Publisher
      Elsevier B.V.
      Volume
      141
      Issue
      11
      Pages
      595 - 599
      Language
      English
      Type
      Article
      Item Usage Stats
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      Abstract
      We investigate the spin-dependent effective electron-electron interactions in a uniform system of two-dimensional electrons to understand the spontaneous magnetization expected to occur at very low density. For this purpose, we adopt the Kukkonen-Overhauser form for the effective interactions which are built by accurately determined local-field factors describing the charge and spin fluctuations. The critical behavior of the effective interaction for parallel spin electrons allows us to quantitatively locate the transition to the ferromagnetic state at rs ≈ 27. When the finite width effects are approximately taken into account the transition occurs at rs ≈ 30 in agreement with recent quantum Monte Carlo calculations.
      Keywords
      D. Electron-electron interactions
      D. Magnetic phase transition
      Electrons
      Ferromagnetic materials
      Monte Carlo methods
      Phase transitions
      Quantum theory
      Two dimensional
      Electron-electron interactions
      Magnetic phase transition
      Spin electrons
      Spin fluctuations
      Magnetic fluids
      Permalink
      http://hdl.handle.net/11693/23527
      Published Version (Please cite this version)
      http://dx.doi.org/10.1016/j.ssc.2007.01.004
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      • Department of Physics 2299
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