Dispersion relation of spin wave in chiral helimagnet under stationary optical vortex radiation

Goto Yutaro; Ishihara Hajime; Yokoshi Nobuhiko

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Dispersion relation of spin wave in chiral helimagnet under stationary optical vortex radiation

机译：旋转波在静止光学涡流下手性旋转中的分散关系

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We investigate a dispersion relation of a spin wave of an effectively one-dimensional chiral helimagnet CrNb3S6, which is under stationary radiation of a resonant optical vortex beam coaxial to that spiral magnetic order axis. We derive a classical magnetic structure by solving Landau-Lifshitz-Gilbert equation and calculate the collective excitation on it. We show that the optical vortex radiation makes the energy gap at k similar to 0, and the exceptional points appear in the dispersion relation. Because such a dispersion relation implies the dynamical properties with instability, our result implies a possibility to control spin wave transport.

机译：我们研究了有效的一维手性联轴器CRNB33S6的旋转波的分散关系，其在谐振光学涡流束同轴的固定辐射到该螺旋磁轴上。通过求解Landau-Lifshitz-Gilbert方程，我们推出了古典磁性结构，并计算了它的集体励磁。我们表明光学涡流辐射使得与类似的k处的能量隙，并且出现的异常点在色散关系中出现。因为这种色散关系意味着具有不稳定性的动态特性，所以我们的结果意味着控制自旋波传输的可能性。

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来源
《Japanese journal of applied physics》 |2021年第9期|098001.1-098001.4|共4页
作者
Goto Yutaro; Ishihara Hajime; Yokoshi Nobuhiko;
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作者单位

Osaka Prefecture Univ Dept Phys & Elect Osaka 5998531 Japan|Osaka Res Inst Ind Sci & Technol Res Div Prod Reliabil Osaka 5941157 Japan;

Osaka Prefecture Univ Dept Phys & Elect Osaka 5998531 Japan|Osaka Univ Dept Mat Engn Sci Osaka 5608531 Japan|Osaka Univ Ctr Quantum Informat & Quantum Biol Osaka 5608531 Japan;

Osaka Prefecture Univ Dept Phys & Elect Osaka 5998531 Japan;

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正文语种 eng
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关键词
chiral helimagnet; optical vortex; spintronics; spin wave; magnon;

机译：手表Helimagnet;光学涡旋;闪蒸;旋转波;MAGNON;

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Dispersion relation of spin wave in chiral helimagnet under stationary optical vortex radiation

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