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arXiv 2009.11432cond-mat.str-elcond-mat.mes-hallcond-mat.mtrl-sci
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各向异性耦合诱导的分数反铁磁Skyrmion晶格

Fractional antiferromagnetic skyrmion lattice induced by anisotropic couplings

Shang Gao, H. D. Rosales, F. A. Gómez Albarracín, Vladimir Tsurkan, Guratinder Kaur, Tom Fennell, Paul Steffens, Martin Boehm, Petr Čermák, Astrid Schneidewind,… 展开作者

Shang Gao, H. D. Rosales, F. A. Gómez Albarracín, Vladimir Tsurkan, Guratinder Kaur, Tom Fennell, Paul Steffens, Martin Boehm, Petr Čermák, Astrid Schneidewind, Eric Ressouche, Daniel C. Cabra, Christian Rüegg, Oksana Zaharko

摘要:

磁Skyrmions是一种具有纳米级缠绕自旋织构的拓扑孤子,在自旋电子学中有着广泛的应用前景。到目前为止,已经在各种磁体中观察到Skyrmions,这些磁体表现出相邻自旋的几乎平行排列,但理论上,具有反平行相邻自旋的Skyrmions也是可能的。后者,反铁磁skyrmions,可以允许更灵活的控制相比,传统的铁磁skyrmions。在这里,通过结合中子散射和蒙特卡罗模拟,我们表明,一个分数反铁磁skyrmion晶格与初期meron字符是稳定的MnSc $_2$ S $_4$通过各向异性耦合。我们的工作表明,理论上提出的反铁磁skyrmion可以在实际材料中稳定,并代表了实现反铁磁skyrmion为基础的自旋电子器件的重要一步。

英文摘要:

Magnetic skyrmions are topological solitons with a nanoscale winding spin texture that hold promise for spintronics applications. Until now, skyrmions have been observed in a variety of magnets that exhibit nearly parallel alignment for the neighbouring spins, but theoretically, skyrmions with anti-parallel neighbouring spins are also possible. The latter, antiferromagnetic skyrmions, may allow more flexible control compared to the conventional ferromagnetic skyrmions. Here, by combining neutron scattering and Monte Carlo simulations, we show that a fractional antiferromagnetic skyrmion lattice with an incipient meron character is stabilized in MnSc$_2$S$_4$ through anisotropic couplings. Our work demonstrates that the theoretically proposed antiferromagnetic skyrmions can be stabilized in real materials and represents an important step towards implementing the antiferromagnetic-skyrmion based spintronic devices.

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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