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arXiv 0912.0671cond-mat.str-el
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各向异性三角晶格上Ising反铁磁体的非局域网络激发

Non-local network-excitation in the Ising antiferromagnet on the anisotropic triangular lattice

Chisa Hotta, Tetsuhiro Kiyota, Nobuo Furukawa

摘要:

研究了三角晶格上的Ising反铁磁体,它们通过两个$J$ -键和一个各向异性的$J'$ -键与$J' \ge J$沿三个不同方向相互作用.虽然它的有限温度状态一直被认为是简单的无序,我们发现一个系统的生成的铁磁$J'$ -债券命名为“好的缺陷”,每个携带的能量$2δ_J\equiv 2(J'-J)$。它们表现出显著的相关性,被认为是一个网络或软晶格。比热在$T^* \sim δ_J$处有一个普适峰,相应的能量遵循温度依赖的激活类型,具有一个激发能隙$2δ_J$。能量学和这个特定的二维状态和其他无序或一维状态之间的交叉进行了讨论。

英文摘要:

We study the Ising antiferromagnet on the triangular lattice which are interacting along three different directions via two $J$-bonds and one anisotropic $J'$-bond with $J' \ge J$. Although its finite temperature state has long been considered as simply disordered, we find a systematic generation of a ferromagnetic $J'$-bonds named "good defects" each carrying the energy $2δ_J\equiv 2(J'-J)$. They exhibit an eminent correlation which is regarded as a network or a soft lattice. The specific heat shows a universal peak at $T^* \sim δ_J$ and the corresponding energy follows the activation type of temperature-dependence with an excitation gap $2δ_J$. Energetics and the crossover between this particular two-dimensional state and the other disordered or one-dimensional states are discussed.

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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