Low-temperature density matrix renormalization group study on spin-1/2 frustrated spin chains
Low-temperature density matrix renormalization group study on spin-1/2 frustrated spin chains
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DOI：
10.1088/1742-6596/200/1/012191
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发表时间：
2010
期刊：
影响因子：
--
通讯作者：
S. Sota;T. Tohyama
中科院分区：
文献类型：
--
作者：
S. Sota;T. Tohyama
利用我们最近建立的低温动力学密度矩阵重整化群，研究了自旋-1/2之字形XY自旋链的矢量自旋手性的动力学关联函数与温度的关系。在零温下，手性有序体系和无手性有序体系分别得到了无隙激发和无隙激发。在有限温度下，我们在间隙系统中发现了一个特征温度，在该温度下，低能动力学手性关联发生了剧烈的变化。这与具有阶数的系统形成对比，在该系统中，相关性随温度平稳变化。
We study the temperature dependence of the dynamical correlation function of the vector spin chirality on spin-1/2 zigzag XY spin chains by using the low-temperature dynamical density matrix renormalization group that we have developed recently. At zero temperature, gapless and gapful excitations of the chiralily are confirmed for systems with and without the chiral order, respectively. At finite temperatures, we find in the gapful system a characteristic temperature where the low-energy dynamical chirality correlation changes dramatically. This is in contrast to the system with the order where the correlation changes smoothly with temperature.