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

Published online by Cambridge University Press:  20 August 2015

Gui-Ping Zhang
Gui-Ping Zhang*
Affiliation:
Department of Physics, Renmin University of China, Beijing 100872, China
*
* Corresponding author.Email:zhanggp96@ruc.edu.en
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Abstract

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.

Keywords

82B0526C9965F9915A30ManganiteMonte Carlo simulationpolynomial moment expansiontriangular latticefrustrationfinite-size effect

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Type
Research Article
Information
Communications in Computational Physics , Volume 10 , Issue 2 , August 2011 , pp. 422 - 432
Copyright
Copyright © Global Science Press Limited 2011

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