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Open Quantum Systems Decoherence

Caloric Phenomena and Stirling-Cycle Performance in Heisenberg- Kitaev Magnon Systems

arXiv

Authors: Bastian Castorene, Martin HvE Groves, Francisco J. Peña, Nicolas Vidal-Silva, Miguel Letelier, Roberto E. Troncoso, Felipe Barra, Patricio Vargas

Year

2026

Paper ID

39086

Status

Preprint

Abstract Read

~2 min

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Abstract

We investigate the Stirling-cycle performance of a Heisenberg--Kitaev magnonic medium with Dzyaloshinskii--Moriya (DM) interactions. Using linear spin-wave theory, we show the DM interaction preserves spectral symmetry, yielding even caloric responses and symmetric Stirling engine efficiency. In contrast, bond-dependent Kitaev exchange asymmetrically distorts the magnonic density of states, enabling distinct direct and inverse caloric effects. Consequently, Kitaev-driven cycles achieve significantly higher efficiencies than DM-driven protocols, approaching a high-performance saturation regime for negative couplings. This establishes exchange-anisotropic magnets as highly tunable platforms for nanoscale solid-state energy conversion.

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We investigate the Stirling-cycle performance of a Heisenberg--Kitaev magnonic medium with Dzyaloshinskii--Moriya (DM) interactions.

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References & Citation Signals

[1] DOI https://doi.org/arXiv:2603.26477 [2] arXiv https://arxiv.org/abs/2603.26477 [3] Publisher https://arxiv.org/abs/2603.26477

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