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| Autori principali: | , , , , , , , , , |
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| Natura: | Preprint |
| Pubblicazione: |
2025
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| Soggetti: | |
| Accesso online: | https://arxiv.org/abs/2504.02291 |
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| _version_ | 1866915225216745472 |
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| author | Koo, Changhyun Park, Jaena Werner, Johannes Lee, Suheon Balz, Christian Islam, A. T. M. Nazmul Oshima, Yugo Lake, Bella Choi, Kwang-Yong Klingeler, Rüdiger |
| author_facet | Koo, Changhyun Park, Jaena Werner, Johannes Lee, Suheon Balz, Christian Islam, A. T. M. Nazmul Oshima, Yugo Lake, Bella Choi, Kwang-Yong Klingeler, Rüdiger |
| contents | We present an X-band and tunable high-frequency/high-field electron spin resonance (HF-ESR) study of single-crystalline Ca$_{10}$Cr$_{7}$O$_{28}$, which constitutes alternating antiferromagnetic and ferromagnetic kagome bilayers. At high temperatures, a phonon-assisted relaxation process is evoked to account for the pronounced increase of the linewidth in an exchange-narrowing regime ($k_{\rm B}T\gg J$). In contrast, at low temperatures ($k_{\rm B}T\lesssim J$), a power-law behavior in line narrowing is observed. Our data reveal two distinct power-law regimes for the linewidth which crossover at $T^*\approx 7.5$~K. Notably, the intriguing evolution of the ESR linewidth in this alternating kagome bilayer system with opposite sign of exchange interactions highlights distinct spin dynamics compared to those in a uniform kagome antiferromagnet. |
| format | Preprint |
| id |
arxiv_https___arxiv_org_abs_2504_02291 |
| institution | arXiv |
| publishDate | 2025 |
| record_format | arxiv |
| spellingShingle | Two-stage evolution of magnetic correlations in spiral spin liquid material, Ca$_{10}$Cr$_{7}$O$_{28}$ Koo, Changhyun Park, Jaena Werner, Johannes Lee, Suheon Balz, Christian Islam, A. T. M. Nazmul Oshima, Yugo Lake, Bella Choi, Kwang-Yong Klingeler, Rüdiger Strongly Correlated Electrons We present an X-band and tunable high-frequency/high-field electron spin resonance (HF-ESR) study of single-crystalline Ca$_{10}$Cr$_{7}$O$_{28}$, which constitutes alternating antiferromagnetic and ferromagnetic kagome bilayers. At high temperatures, a phonon-assisted relaxation process is evoked to account for the pronounced increase of the linewidth in an exchange-narrowing regime ($k_{\rm B}T\gg J$). In contrast, at low temperatures ($k_{\rm B}T\lesssim J$), a power-law behavior in line narrowing is observed. Our data reveal two distinct power-law regimes for the linewidth which crossover at $T^*\approx 7.5$~K. Notably, the intriguing evolution of the ESR linewidth in this alternating kagome bilayer system with opposite sign of exchange interactions highlights distinct spin dynamics compared to those in a uniform kagome antiferromagnet. |
| title | Two-stage evolution of magnetic correlations in spiral spin liquid material, Ca$_{10}$Cr$_{7}$O$_{28}$ |
| topic | Strongly Correlated Electrons |
| url | https://arxiv.org/abs/2504.02291 |