近藤晶格模型中的铁磁相

A. Juozapavičius, I. McCulloch, M. Gulácsi, A. Rosengren
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引用次数: 8

摘要

摘要利用SO(4)不变密度矩阵重整化群算法,在一维反铁磁Kondo晶格模型相图的顺磁区域内,获得了足够的数值精度来展示新的铁磁相区。详细研究了自旋-自旋相关函数、能隙、单重态数等物理性质。对磁化强度的直接测量揭示了连续的顺磁-铁磁相变。
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Ferromagnetic phases in the Kondo lattice model
Abstract Using an SO(4) invariant density-matrix renormalization group algorithm a sufficient numerical accuracy is achieved to demonstrate new ferromagnetic phase regions inside the paramagnetic area of the one-dimensional antiferromagnetic Kondo lattice model phase diagram. Spin-spin correlation functions, energy gap, number of singlets and other physical properties are investigated in detail. Direct measurements of the magnetization reveal continuous paramagnetic-ferromagnetic phase transitions.
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