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arXiv 2011.09102cond-mat.mes-hall
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非共线反铁磁体中的自旋超流性

Spin superfluidity in noncollinear antiferromagnets

Bo Li, Alexey A. Kovalev

摘要:

我们研究了交换作用主导的三子格反铁磁体中的自旋超流输运。在长波长制度的系统描述的$SO(3)$不变场论。来自Dzyaloshinskiii-Moriya相互作用或各向异性的额外修正可以破坏对称性;然而,系统仍然近似地保持$U(1)$ -旋转对称性。因此,幂律空间衰减签名的自旋超流性被确定在一个非本地的测量设置,其中的自旋注入描述的广义自旋混合电导。我们建议铁黄钾铁矾作为实现我们的建议有前途的材料候选人。

英文摘要:

We explore the spin superfluid transport in exchange interaction dominated three-sublattice antiferromagnets. The system in the long-wavelength regime is described by an $SO(3)$ invariant field theory. Additional corrections from Dzyaloshinskii-Moriya interactions or anisotropies can break the symmetry; however, the system still approximately holds a $U(1)$-rotation symmetry. Thus, the power-law spatial decay signature of spin superfluidity is identified in a nonlocal-measurement setup where the spin injection is described by the generalized spin-mixing conductance. We suggest iron jarosites as promising material candidates for realizing our proposal.

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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