Evidence for a floating phase of the transverse ANNNI model at high frustration
Evidence for a floating phase of the transverse ANNNI model at high frustration
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DOI：
10.1103/physrevb.76.094410
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发表时间：
2007-02
影响因子：
3.7
通讯作者：
M. Beccaria;M. Campostrini;A. Feo
中科院分区：
文献类型：
--
作者：
M. Beccaria;M. Campostrini;A. Feo
利用密度矩阵重整化群算法研究了高挫败度区域$(\ensuremath{\kappa}g0.5)$中的横向量子ANNNI模型。我们得到了一个精确的相位图，显示了一个浮相的存在的明确证据，从顺磁调制相分离的高阶临界线结束在多临界点。我们得到了两条临界线的简单而准确的公式。
We study the transverse quantum ANNNI model in the region of high frustration $(\ensuremath{\kappa}g0.5)$ using the density matrix renormalization group algorithm. We obtain a precise determination of the phase diagram, showing clear evidence for the existence of a floating phase, separated from the paramagnetic modulated phase by a high-order critical line ending at the multicritical point. We obtain simple and accurate formulas for the two critical lines.