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1 results

  • Double Exchange Model in Triangular Lattice Studied by Truncated Polynomial Expansion Method

  • Gui-Ping Zhang
  • Journal:
    Communications in Computational Physics / Volume 10 / Issue 2 / August 2011
    Published online by Cambridge University Press:
    20 August 2015, pp. 422-432
    Print publication:
    August 2011

  • The low temperature properties of double exchange model in triangular lattice are investigated via truncated polynomial expansion method (TPEM), which reduces the computational complexity and enables parallel computation. We found that for the half-filling case a stable 120° spin configuration phase occurs owing to the frustration of triangular lattice and is further stabilized by antiferromagnetic (AF) su-perexchange interaction, while a transition between a stable ferromagnetic (FM) phase and a unique flux phase with small finite-size effect is induced by AF superexchange interaction for the quarter-filling case.