Thermomagnetic Anomalies by Magnonic Criticality in Ultracold Atomic Transport
We investigate thermomagnetic transport in an ultracold atomic system with two ferromagnets linked via a magnetic quantum point contact. Using the 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.
Authors
- Hiroyuki Tajima (ORCID: https://orcid.org/0000-0001-5247-7116)
- Yuta Sekino (ORCID: https://orcid.org/0000-0002-2864-6984)
- Shun Uchino (ORCID: https://orcid.org/0000-0002-3007-1753)
- Mamoru Matsuo (ORCID: https://orcid.org/0000-0003-1303-7614)
- Yuya Ominato (ORCID: https://orcid.org/0000-0003-2212-9449)
Institutions
- Japan Atomic Energy Agency (JP)
- Pioneer (United States) (US)
- Waseda University (JP)
- Kavli Institute for Theoretical Sciences (CN)
- RIKEN (JP)
- RIKEN Center for Emergent Matter Science (JP)
- Geophysical Laboratory (US)
- University of Chinese Academy of Sciences (CN)
- The University of Tokyo (JP)
Publication Details
- Journal
- Physical Review Letters
- Published
- 2024-10-16
- DOI
- https://doi.org/10.1103/physrevlett.133.163402
- Citations
- 2
- Primary Topic
- Quantum and electron transport phenomena
- Type
- article
- Field-Weighted Citation Impact
- 0.68
Funders
- Matsuo Foundation for Science Promotion
- Ministry of Education, Culture, Sports, Science and Technology
- National Natural Science Foundation of China
- Chinese Academy of Sciences
- Japan Society for the Promotion of Science
- Japan Science and Technology Agency