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arXiv 0704.3510cond-mat.str-el
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三角形反铁磁体中声子与自旋波的耦合

Coupling of phonons and spin waves in triangular antiferromagnet

Jung Hoon Kim, Jung Hoon Han

摘要:

本文研究了三角形反铁磁体中自旋-声子耦合的影响,其中耦合是交换-伸缩型的。磁振子色散被示出为在波矢量(2 π,0)和它的磁振子相关点显着修改,表现出一个类似于旋转的最小值和最终的不稳定的色散。在耦合存在的情况下,计算了各种关联函数,如等时声子关联、自旋-自旋关联和局域磁化强度。

英文摘要:

We investigate the influence of the spin-phonon coupling in the triangular antiferromagnet where the coupling is of the exchange-striction type. The magnon dispersion is shown to be modified significantly at wave vector (2pi,0) and its symmetry-related points, exhibiting a roton-like minimum and an eventual instability in the dispersion. Various correlation functions such as equal-time phonon correlation, spin-spin correlation, and local magnetization are calculated in the presence of the coupling.

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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