Caloric Phenomena and Stirling-Cycle Performance in Heisenberg- Kitaev Magnon Systems
The study investigates a Stirling engine operating within a Heisenberg-Kitaev magnonic medium with Dzyaloshinskii-Moriya (DM) interactions. The DM interaction preserves spectral symmetry, leading to symmetric caloric responses and balanced engine efficiency. However, the Kitaev interaction asymmetrically distorts the system, allowing for distinct direct and inverse caloric effects. This reveals that Kitaev-driven cycles achieve significantly higher efficiencies than DM-driven ones.