论文标题
各向异性三角晶格哈伯德模型的磁相
Magnetic phases of the anisotropic triangular lattice Hubbard model
论文作者
论文摘要
在各向异性三角晶格上的哈伯德模型在两个维度上，这是一种沮丧的电子物理学的基本模型，显示了各种各样的阶段和相变。这项工作使用梯子双效率近似研究模型，该模型非扰动地捕获局部相关性，但近似于非局部相关性。我们发现金属，一维抗磁磁性，非连接性抗铁磁磁性，方形晶格抗铁磁剂和螺旋相，但在相图的不同部分中没有共线性抗铁磁顺序的证据。分析旋转易感性，我们看到了同意的两个区域和先前工作的差异。详细讨论了CS $ _2 $ CUCL $ _4 $的情况。
The Hubbard model on an anisotropic triangular lattice in two dimensions, a fundamental model for frustrated electron physics, displays a wide variety of phases and phase transitions. This work investigates the model using the ladder dual fermion approximation which captures local correlations non-perturbatively but approximates non-local correlations. We find metallic, one-dimensional antiferromagnetic, non-collinear antiferromagnetic, square-lattice antiferromagnetic, and spiral phases but no evidence of collinear antiferromagnetic order in different parts of the phase diagram. Analyzing the spin susceptibility in detail, we see both regions of agreement and of discrepancy with previous work. The case of Cs$_2$CuCl$_4$ is discussed in detail.
