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arXiv 0902.1244cond-mat.str-el
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三角晶格上阻挫费米子的密度矩阵重整化研究

Density-matrix renormalization study of the frustrated fermions on the triangular lattice

S. Nishimoto, C. Hotta

摘要:

我们表明,二维密度矩阵重整化分析是有用的检测对称性破缺的费米子模型的三角晶格。在边缘位置具有化学势的圆柱形边界条件下,我们发现开边作为微扰来选择最强关联{ \it仅在存在长程序时}。我们还表明,普通的尺寸缩放分析的电荷间隙,以及在此边界条件下的局部电荷密度可以确定的金属-绝缘体相边界,这几乎完美的状态和精确解的密度在弱耦合和强耦合区域,分别。

英文摘要:

We show that the two-dimensional density-matrix renormalization analysis is useful to detect the symmetry breaking in the fermionic model on a triangular lattice. Under the cylindrical boundary conditions with chemical potentials on edge sites, we find that the open edges work as perturbation to select the strongest correlations {\it only in the presence of a long range order}. We also demonstrate that the ordinary size scaling analysis on the charge gap as well as that of the local charge density under this boundary condition could determine the metal-insulator phase boundary, which scales almost perfectly with the density of states and the exact solutions in the weak and strong coupling region, respectively.

机构、总结、中文摘要均由AI分析而来,可能存在错误,请以论文正文为准。

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