Year: 2025
Type: article
Abstract: The Berry curvature, resembling the magnetic field in reciprocal space, offers a captivating avenue for exploring unique electromagnetic phenomena devoid of real-space analogs. Here, we investigate the emergent electromagnetic induction by solenoidal Berry curvature with its field lines forming loops, links, and knots. In stark contrast to the conventional results predicted by Faraday's law, which dictates that alternating magnetic fields yield alternating electric fields with a net zero average, the alternating Berry curvature can engender directional electromagnetic induction. Such an effect is attributed to the presence of singularities in the Berry curvature, accompanied by a 2 π jump in the Berry flux. Notably, this jump does not trigger a diamagnetic impulse, due to the gauge invariance of the Berry phase modulo 2 π . Consequently, the induced electric field maintains finite values under time averaging, manifesting itself as a directional pumping current. Our research sheds light on a different type of anomalous electromagnetic induction effect, thereby expanding our comprehension of exotic electromagnetic phenomena.
Source: Physical Review Research
Authors: Wei Luo, Wei Chen, D. Y. Xing
Language: English
Subfield: Atomic and Molecular Physics, and Optics
Field: Physics and Astronomy
Domain: Physical Sciences
Open Access status: gold
Estimated APC paid: $2,625
Funders: National Natural Science Foundation of China, Government of Jiangsu Province, Natural Science Foundation of Jiangsu Province, Jiangxi Provincial Department of Science and Technology, National Key Research and Development Program of China, Fundamental Research Funds for the Central Universities
OpenAlex ID: W4409737110