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

作     者：Gui-Ping Zhang 

作者机构：Department of PhysicsRenmin University of ChinaBeijing 100872China 

出 版 物：《Communications in Computational Physics》 (计算物理通讯（英文）)

年 卷 期：2011年第10卷第7期

页      面：422-432页

核心收录：

学科分类：07[理学] 0701[理学-数学] 070101[理学-基础数学] 

基　　金：supported by the NFSC grants No.10425417 and No.10674142 

主　　题：Manganite Monte Carlo simulation polynomial moment expansion triangular lattice frustration finite-size effect 

摘      要：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 *** 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)superexchange 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.