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arXiv 2203.03569cond-mat.str-el
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Néel反铁磁体中织构诱导的自旋轨道耦合和Skyrmion电子束缚态

Texture-induced spin-orbit coupling and Skyrmion-electron bound states in a Néel antiferromagnet

Naïmo Davier, Revaz Ramazashvili

摘要:

我们推导了在交错磁化的光滑织构存在下Néel反铁磁体的有效质量电子哈密顿量。对于电子带极值的某些位置,织构产生一种特殊的、异常强烈的自旋-轨道耦合,其尺度为$\hbar v / L$,其中$v$是费米速度,$L$是织构的特征长度尺度。对于Skyrmion织构,这种耦合产生电子束缚态,其能量标度由电子谱中的间隙$Δ$给出。对于掺杂剂载体,这种束缚态将Skyrmion转变为带电粒子,可以通过电场来操纵。

英文摘要:

We derive effective-mass electron Hamiltonian for a Néel antiferromagnet in the presence of a smooth texture of the staggered magnetization. For certain locations of electron band extrema, the texture produces a peculiar and anomalously strong spin-orbit coupling of the scale $\hbar v / L$, with $v$ the Fermi velocity and $L$ the characteristic length scale of the texture. For a Skyrmion texture, this coupling generates electron bound states, whose energy scale is given by the gap $Δ$ in the electron spectrum. With dopant carriers, such bound states turn the Skyrmion into a charged particle, that can be manipulated by electric field.

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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