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arXiv · 2503.12794

RKKY interaction in the presence of a charge-density-wave order

Kazushi Aoyama
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Abstract

Effects of a charge-density-wave (CDW) order on the Ruderman-Kittel-Kasuya-Yosida (RKKY) interaction has been theoretically investigated. Assuming that the CDW with an incommensurate ordering vector ${\bf Q}_c$ is induced by a Fermi surface nesting, we show that the CDW order suppresses the conventional RKKY interaction and that it can induce a mode coupling between magnetic ordering vectors ${\bf q}_m$ and ${\bf q}_m\pm {\bf Q}_c$. This suggests that below the CDW transition temperature, the correlation between localized spins may develop at both ${\bf q}_m$ and ${\bf q}_m\pm {\bf Q}_c$. Experimental implications of our result to van der Waals materials $R$Te$_3$ are also discussed.

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Kazushi Aoyama. 2025-03-17. RKKY interaction in the presence of a charge-density-wave order. https://doi.org/10.1103/physrevb.111.l100404

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