arXivDaily arXiv每日学术速递 周一至周五更新
arXiv 0811.0026cond-mat.str-el
收藏

经典Kagome反铁磁体中的长程序:有效哈密顿方法

Long range order in the classical kagome antiferromagnet: effective Hamiltonian approach

Christopher L. Henley

摘要:

根据Huse和Rutenberg [Phys.Rev.B45,7536(1992)],我认为kagomé晶格上的经典海森堡反铁磁体具有$\sqrt{3}\times\sqrt{3}$型的长程自旋序(自旋平面的模渐进取向涨落)。我从软(面外)自旋涨落模的有效四次哈密顿量开始,并将依赖于离散共面态的那些项视为微扰。软模式的相关性,成为一个离散的有效哈密顿系数,估计解析。

英文摘要:

Following Huse and Rutenberg [Phys. Rev. B 45, 7536 (1992)], I argue the classical Heisenberg antiferromagnet on the kagomé lattice has long-range spin order of the $\sqrt{3}\times\sqrt{3}$ type (modulo gradual orientation fluctuations of the spins' plane). I start from the effective quartic Hamiltonian for the soft (out of plane) spin fluctuation modes, and treat as a perturbation those terms which depend on the discrete coplanar state. Soft mode correlations, which become the coefficients of a discrete effective Hamiltonian, are estimated analytically.

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。

↑