Caloric Phenomena and Stirling-Cycle Performance in Heisenberg- Kitaev Magnon Systems
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arXiv
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| Auteurs principaux: | , , , , , , , |
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| Format: | Preprint |
| Publié: |
2026
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| _version_ | 1866911548318941184 |
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| author | Castorene, Bastian Groves, Martin HvE Peña, Francisco J. Vidal-Silva, Nicolas Letelier, Miguel Troncoso, Roberto E. Barra, Felipe Vargas, Patricio |
| author_facet | Castorene, Bastian Groves, Martin HvE Peña, Francisco J. Vidal-Silva, Nicolas Letelier, Miguel Troncoso, Roberto E. Barra, Felipe Vargas, Patricio |
| contents | 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. |
| format | Preprint |
| id |
arxiv_https___arxiv_org_abs_2603_26477 |
| institution | arXiv |
| publishDate | 2026 |
| record_format | arxiv |
| spellingShingle | Caloric Phenomena and Stirling-Cycle Performance in Heisenberg- Kitaev Magnon Systems Castorene, Bastian Groves, Martin HvE Peña, Francisco J. Vidal-Silva, Nicolas Letelier, Miguel Troncoso, Roberto E. Barra, Felipe Vargas, Patricio Statistical Mechanics Quantum Physics 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. |
| title | Caloric Phenomena and Stirling-Cycle Performance in Heisenberg- Kitaev Magnon Systems |
| topic | Statistical Mechanics Quantum Physics |
| url | https://arxiv.org/abs/2603.26477 |