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arXiv 1311.0342cond-mat.str-el
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莫特绝缘体中热流引起的轨道磁

Orbital Magnetism Induced by Heat Currents in Mott insulators

Shi-Zeng Lin, Cristian D. Batista

摘要:

我们推导出了莫特绝缘体强耦合区域的有效热流密度算符。类似于电流密度的情况,对该有效算子的主要贡献与局域标量自旋手征$\hatχ_{jkl}= \mathbf{S}_l\cdot\left(\mathbf{S}_j\times \mathbf{S}_k\right)$成比例。这种常见形式的有效热和电流密度算子导致了莫特绝缘体中的新交叉响应。在含有奇数个跳跃项的环的系统中,热流会引起轨道磁矩的分布。轨道矩的相对取向取决于磁性离子的特定晶格。这种微妙的效应是由热和电流的对称性共同引起的。

英文摘要:

We derive the effective heat current density operator for the strong-coupling regime of Mott insulators. Similarly to the case of the electric current density, the leading contribution to this effective operator is proportional to the local scalar spin chirality $\hatχ_{jkl}= \mathbf{S}_l\cdot\left(\mathbf{S}_j\times \mathbf{S}_k\right)$. This common form of the effective heat and electric current density operators leads to a novel cross response in Mott insulators. A heat current induces a distribution of orbital magnetic moments in systems containing loops of an odd number of hopping terms. The relative orientation of the orbital moments depends on the particular lattice of magnetic ions. This subtle effect arises from the symmetries that the heat and electric currents have in common.

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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