@article{10902/32655,
year = {2024},
month = {3},
url = {https://hdl.handle.net/10902/32655},
abstract = {The recent discovery of polar topological structures has opened the door for exciting physics and emergent properties. There is, however, little methodology to engineer stability and ordering in these systems, properties of interest for engineering emergent functionalities. Notably, when the surface area is extended to arbitrary thicknesses, the topological polar texture becomes unstable. Here we show that this instability of the phase is due to electrical coupling between successive layers. We demonstrate that this electrical coupling is indicative of an effective screening length in the dielectric, similar to the conductor-ferroelectric interface. Controlling the electrostatics of the superlattice interfaces, the system can be tuned between a pure topological vortex state and a mixed classical-topological phase. This coupling also enables engineering coherency among the vortices, not only tuning the bulk phase diagram but also enabling the emergence of a 3D lattice of polar textures},
organization = {P.M., P.B., P.K., L.W.M., and R.R. acknowledge funding from the Department of Defense, ARO Grant No. W911NF-21-2-0162 (ETHOS). P.K. also acknowledges partial support of the Intel Corp. via the COFEEE Program. E.H. acknowledges support by the U.S. Department of Energy (DOE), Office of Basic Energy Sciences (BES), Division of Materials Sciences and Engineering, and the Center for Nanophase Materials Sciences, a U.S. DOE Office of Science User Facility at Oak Ridge National Laboratory. E.H. and P.E.H. acknowledge funding from the Army Research Office, Grant Number W911NF-21-1-0119 and the Office of Naval Research, Grant Number N00014-23-1-2630 F.G.-O. and J.J. acknowledge financial support from Grant No. PGC2018-096955-B-C41 funded by MCIN/AEI/10.13039/501100011033 and by ERDF "A way of making Europe" by the European Union. F.G.-O. acknowledges financial support from Grant No. FPU18/04661 funded by MCIN/AEI/10.13039/501100011033. Work at the Molecular Foundry was supported by the Office of Science, Office of Basic Energy Sciences, of the U.S. Department of Energy under Contract No. DE-AC02-05CH11231.},
publisher = {American Chemical Society},
publisher = {Nano Letters, 2024, 24 (10), 2972 - 2979},
title = {Interlayer coupling controlled ordering and phases in polar vortex superlattices},
author = {Meisenheimer, Peter and Ghosal, Arundhati and Hoglund, Eric and Wang, Zhiyang and Behera, Piush and Gómez Ortiz, Fernando and Kavle, Pravin and Karapetrova, Evguenia and García Fernández, Pablo (físico) and Martin, Lane W. and Raja, Archana and Chen, Long-Qing and Hopkins, Patrick E. and Junquera Quintana, Francisco Javier and Ramesh, Ramamoorthy},
}