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arXiv · 2104.08071

Controlling the RKKY interaction and heat transport in a Kitaev spin liquid via $Z_2$ flux walls

Jun-Hui Zheng·Arne Brataas
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Abstract

Kitaev spin liquids (KSLs) contain both itinerant Majorana fermions and localized $Z_2$ flux excitations. The mobile fermions transport energy, while the fluxes hinder heat flow. By controlling the flux configuration, one can separate a KSL into different domains via $Z_2$ flux walls. We show that at low temperatures, the wall significantly suppresses the Majorana-mediated Ruderman-Kittel-Kasuya-Yosida (RKKY) interaction and blocks the heat transfer between domains.

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Jun-Hui Zheng, Arne Brataas. 2021-04-16. Controlling the RKKY interaction and heat transport in a Kitaev spin liquid via $Z_2$ flux walls. https://doi.org/10.1103/physrevb.104.064437

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