Magnetism driven by the interplay of fluctuations and frustration in the easy-axis triangular XXZ model with transverse fields
Magnetism driven by the interplay of fluctuations and frustration in the easy-axis triangular XXZ model with transverse fields
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DOI：
10.1103/physrevb.100.140410
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发表时间：
2019-10
影响因子：
3.7
通讯作者：
D. Yamamoto;G. Marmorini;M. Tabata;Kazuki Sakakura;I. Danshita
中科院分区：
文献类型：
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作者：
D. Yamamoto;G. Marmorini;M. Tabata;Kazuki Sakakura;I. Danshita
研究了横磁场作用下自旋为1/2的易轴XXZ模型描述的阻挫反铁磁体中涨落和阻挫的综合效应，并提出了一种利用三角形光晶格中相干耦合的二元混合费米原子对该模型进行量子模拟的方法.我们进行了一个集团平均场加标度分析表明，基态表现出几个非平凡的磁相位和自旋重取向的量子有序无序机制所造成的过渡。此外，我们发现，从Monte Carlo模拟，热涨落诱导的Berezinskiii-Kosterlitz-无边界物理和长程有序在不同的双折射意外共存。这些预测，除了与当前和未来的三角形反铁磁材料的实验相关之外，还可以在实验室中结合目前可用的冷原子技术进行测试。
We study the combined effects of fluctuations and frustration in frustrated antiferromagnets described by the spin-1/2 easy-axis XXZ model with transverse magnetic fields, and propose its promising quantum simulation with a coherently coupled binary mixture of Fermi atoms in a triangular optical lattice. We perform a cluster mean-field plus scaling analysis to show that the ground state exhibits several nontrivial magnetic phases and a spin reorientation transition caused by the quantum order-by-disorder mechanism. Moreover, we find from Monte Carlo simulations that thermal fluctuations induce an unexpected coexistence of Berezinskii-Kosterlitz-Thouless physics and long-range order in different correlators. These predictions, besides being relevant to present and future experiments on triangular antiferromagnetic materials, can be tested in the laboratory with the combination of the currently available techniques for cold atoms.