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arXiv 2103.08941cond-mat.str-elcond-mat.mtrl-sci
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强自旋轨道耦合莫特绝缘体的Floquet工程

Floquet engineering of Mott insulators with strong spin-orbit coupling

Naoya Arakawa, Kenji Yonemitsu

摘要:

提出了一种控制强自旋轨道耦合莫特绝缘体交换相互作用的方法。考虑了强自旋轨道耦合的多轨道系统和圆偏振光场,导出了强相互作用极限下的有效哈密顿量。应用这一理论的极小模型的$α$ $_{3}$,我们表明,的幅度和符号的三个交换相互作用,$J$,$K$,和$Γ$,可以同时改变。然后,考虑另一种情况,其中一个跳跃积分具有不同的值,而其他参数与$α$ $_{3}$相同,我们表明,海森堡相互作用$J$可以做得比各向异性交换相互作用$K$和$Γ$小得多。

英文摘要:

We propose a method for controlling the exchange interactions of Mott insulators with strong spin-orbit coupling. We consider a multiorbital system with strong spin-orbit coupling and a circularly polarized light field and derive its effective Hamiltonian in the strong-interaction limit. Applying this theory to a minimal model of $α$-RuCl$_{3}$, we show that the magnitudes and signs of three exchange interactions, $J$, $K$, and $Γ$, can be changed simultaneously. Then, considering another case in which one of the hopping integrals has a different value and the other parameters are the same as those for $α$-RuCl$_{3}$, we show that the Heisenberg interaction $J$ can be made much smaller than the anisotropic exchange interactions $K$ and $Γ$.

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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