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| Main Authors: | , , , , |
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| Format: | Preprint |
| Published: |
2023
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| Subjects: | |
| Online Access: | https://arxiv.org/abs/2312.04280 |
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| _version_ | 1866914974992957440 |
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| author | Sekino, Yuta Ominato, Yuya Tajima, Hiroyuki Uchino, Shun Matsuo, Mamoru |
| author_facet | Sekino, Yuta Ominato, Yuya Tajima, Hiroyuki Uchino, Shun Matsuo, Mamoru |
| contents | We investigate thermomagnetic transport in an ultracold atomic system with two ferromagnets linked via a magnetic quantum point contact. Using nonequilibrium Green's function approach, we show a divergence in spin conductance and a slowing down of spin relaxation that manifest in the weak effective-Zeeman-field limit. These anomalous spin dynamics result from the magnonic critical point at which magnons become gapless due to spontaneous magnetization. Our findings unveil untapped dynamics in ultracold atomic systems, opening new avenues in thermomagnetism. |
| format | Preprint |
| id |
arxiv_https___arxiv_org_abs_2312_04280 |
| institution | arXiv |
| publishDate | 2023 |
| record_format | arxiv |
| spellingShingle | Thermomagnetic Anomalies by Magnonic Criticality in Ultracold Atomic Transport Sekino, Yuta Ominato, Yuya Tajima, Hiroyuki Uchino, Shun Matsuo, Mamoru Quantum Gases Mesoscale and Nanoscale Physics We investigate thermomagnetic transport in an ultracold atomic system with two ferromagnets linked via a magnetic quantum point contact. Using nonequilibrium Green's function approach, we show a divergence in spin conductance and a slowing down of spin relaxation that manifest in the weak effective-Zeeman-field limit. These anomalous spin dynamics result from the magnonic critical point at which magnons become gapless due to spontaneous magnetization. Our findings unveil untapped dynamics in ultracold atomic systems, opening new avenues in thermomagnetism. |
| title | Thermomagnetic Anomalies by Magnonic Criticality in Ultracold Atomic Transport |
| topic | Quantum Gases Mesoscale and Nanoscale Physics |
| url | https://arxiv.org/abs/2312.04280 |