Controlling the RKKY interaction and heat transport in a Kitaev spin liquid via Z2 flux walls
Abstract
Kitaev spin liquids (KSLs) contain both itinerant Majorana fermions and localized Z2 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 Z2 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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