TY - JOUR
T1 - Polar vortex hidden in twisted bilayers of paraelectric SrTiO3
AU - Sha, Haozhi
AU - Zhang, Yixuan
AU - Ma, Yunpeng
AU - Li, Wei
AU - Yang, Wenfeng
AU - Cui, Jizhe
AU - Li, Qian
AU - Huang, Houbing
AU - Yu, Rong
N1 - Publisher Copyright:
© The Author(s) 2024.
PY - 2024/12
Y1 - 2024/12
N2 - Polar topologies, such as vortex and skyrmion, have attracted significant interest due to their unique physical properties and promising applications in high-density memory devices. To date, all known polar vortices are present in or induced by ferroelectric materials. In this study, we find polar vortex arrays in paraelectric SrTiO3. Using multislice electron ptychography, the evolution of vorticity along the vortex axis is revealed in twisted bilayers of SrTiO3 with deep-sub-angstrom resolution and one picometer accuracy. The surprising finding of polar vortices in a paraelectric crystal opens up opportunities for polarization physics and corresponding new devices.
AB - Polar topologies, such as vortex and skyrmion, have attracted significant interest due to their unique physical properties and promising applications in high-density memory devices. To date, all known polar vortices are present in or induced by ferroelectric materials. In this study, we find polar vortex arrays in paraelectric SrTiO3. Using multislice electron ptychography, the evolution of vorticity along the vortex axis is revealed in twisted bilayers of SrTiO3 with deep-sub-angstrom resolution and one picometer accuracy. The surprising finding of polar vortices in a paraelectric crystal opens up opportunities for polarization physics and corresponding new devices.
UR - http://www.scopus.com/inward/record.url?scp=85213725364&partnerID=8YFLogxK
U2 - 10.1038/s41467-024-55328-1
DO - 10.1038/s41467-024-55328-1
M3 - Article
C2 - 39738038
AN - SCOPUS:85213725364
SN - 2041-1723
VL - 15
JO - Nature Communications
JF - Nature Communications
IS - 1
M1 - 10915
ER -