Observation of room-temperature polar skyrmions [* Cross-Reference *]

Version 1.0
Das, S.; Tang, Y. L.; Hong, Z.; Gonçalves, M. A.P.; McCarter, M. R.; Klewe, C.; Nguyen, K. X.; Gómez-Ortiz, F.; Shafer, P.; Arenholz, E.; Stoica, V. A.; Hsu, S. L.; Wang, B.; Ophus, C.; Liu, J. F.; Nelson, C. T.; Saremi, S.; Prasad, B.; Mei, A. B.; Schlom, D. G.; Íñiguez, J.; García-Fernández, P.; Muller, D. A.; Chen, L. Q.; Junquera, J.; Martin, L. W.; Ramesh, R., 2019, "Observation of room-temperature polar skyrmions [* Cross-Reference *]", https://lore.list.lu/citation?persistentId=perma:LIST.6W7JL1, LIST Open Repository, V1
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Description
Complex topological configurations are fertile ground for exploring emergent phenomena and exotic phases in condensed-matter physics. For example, the recent discovery of polarization vortices and their associated complex-phase coexistence and response under applied electric fields in superlattices of (PbTiO3)n/(SrTiO3)n suggests the presence of a complex, multi-dimensional system capable of interesting physical responses, such as chirality, negative capacitance and large piezo-electric responses1–3. Here, by varying epitaxial constraints, we discover room-temperature polar-skyrmion bubbles in a lead titanate layer confined by strontium titanate layers, which are imaged by atomic-resolution scanning transmission electron microscopy. Phase-field modelling and second-principles calculations reveal that the polar-skyrmion bubbles have a skyrmion number of +1, and resonant soft-X-ray diffraction experiments show circular dichroism, confirming chirality. Such nanometre-scale polar-skyrmion bubbles are the electric analogues of magnetic skyrmions, and could contribute to the advancement of ferroelectrics towards functionalities incorporating emergent chirality and electrically controllable negative capacitance. (2019-01-01)
***This entry has been automatically imported via Infodoc(ASO) CSV by LIST harvest scripts. Please refer to https://doi.org/10.1038/s41586-019-1092-8 for the original and latest version of the dataset and data downloads*** (2025-12-04)
Subject Other
Keyword Complex topological configurations, exploring emergent phenomena, condensed-matter physics, topological configurations
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