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arXiv 2602.19935cond-mat.str-el
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层状蜂窝铁磁体中的各向异性磁激子

Anisotropic magnons in a layered honeycomb ferromagnet

STFC Rutherford Appleton Laboratory(STFC卢瑟福阿普尔顿实验室);Oak Ridge National Lab(橡树岭国家实验室)

Travis J. Williams, Douglas L. Abernathy, Mark D. Lumsden, Jiaqiang Yan, Andrew D. Christianson

AI总结:

研究发现层状蜂窝铁磁体CrSiTe₃中存在各向异性磁激子,推测其由交换各向异性引起,但Kitaev-like相互作用无法完全解释光谱特征。

摘要:

近期的实验和理论研究表明,在二维铁磁半导体CrSiTe₃中可能存在Dirac磁激子间隙。为了探讨该间隙的存在,进行了详细的中子散射测量,结果显示该间隙非常小或不存在,此前的测量受到实验因素的干扰。在这些测量中发现,垂直方向的耦合可以解释当CrSiTe₃被剥离为单层时磁相变温度增加的通常特性。此外,通过提出的Dirac点,证明该材料在垂直方向具有各向异性磁激子。我们推测这可能是由于交换各向异性,尽管Kitaev-like相互作用本身无法解释光谱。

英文摘要:

Recent experimental and theoretical studies have suggested a possible Dirac magnon gap in the two-dimensional ferromagnetic semiconductor CrSiTe$_3$. Detailed neutron scattering measurements were performed to shed light on the existence of the magnon gap, and suggest that the gap is very small or non-existent, with previous measurements being complicated by experimental factors. During these measurements, it was found that the out-of-plane couplings could explain the usual property of the increase in the magnetic transition temperature when CrSiTe$_3$ is exfoliated to monolayers. Furthermore, the material was shown to have anisotropic magnons along the out-of-plane direction, through the proposed Dirac point. We speculate that this is due to an exchange anisotropy, though Kitaev-like interactions alone cannot explain the spectra.

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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