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arXiv 1503.07570cond-mat.str-el
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三柱体上自旋- $1/2$三角$J_1$ - $J_2$ Heisenberg模型的Phase Diagram

Phase Diagram of the Spin-$1/2$ Triangular $J_1$-$J_2$ Heisenberg Model on a 3-leg Cylinder

S. N. Saadatmand, B. J. Powell, I. P. McCulloch

摘要:

研究了三角晶格上最近邻和次最近邻自旋交换耦合的受抑海森堡模型的相图。利用密度矩阵重整化群方法,我们得到了该模型的完整相图,包括准长程$120^\circ$和柱状序,以及具有短程关联的Majumdar-Ghosh相.所有这些相都是非手性的和平面的。我们还确定了相变的性质。

英文摘要:

We study the phase diagram of the frustrated Heisenberg model on the triangular lattice with nearest and next-nearest neighbor spin exchange coupling, on 3-leg ladders. Using the density-matrix renormalization-group method, we obtain the complete phase diagram of the model, which includes quasi-long-range $120^\circ$ and columnar order, and a Majumdar-Ghosh phase with short-ranged correlations. All these phases are non-chiral and planar. We also identify the nature of phase transitions.

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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