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Updated: Oct 4, 2025

Visualizing Uniaxial-strain Manipulation of Antiferromagnetic Domains in Fe1+YTe Using a Spin-polarized Scanning Tunneling Microscope
Published on: March 24, 2019
A Scalable Network Model for Electrically Tunable Ferroelectric Domain Structure in Twistronic Bilayers of
Vladimir V Enaldiev1,2,3, Fabio Ferreira1,2, Vladimir I Fal'ko1,2,4
1University of Manchester, School of Physics and Astronomy, Oxford Road, Manchester M13 9PL, United Kingdom.
Abstract:
Moiré structures in small-angle-twisted bilayers of two-dimensional (2D) semiconductors with a broken-symmetry interface form arrays of ferroelectric (FE) domains with periodically alternating out-of-plane polarization. Here, we propose a network theory for the tunability of such FE domain structure by applying an electric field perpendicular to the 2D crystal. Using multiscale analysis, we derive a fully parametrized string-theory-like description of the domain wall network (DWN) and show that it undergoes a qualitative change, after the arcs of partial dislocation (PD) like domain walls merge (near the network nodes) into streaks of perfect screw dislocations (PSD), which happens at a threshold displacement field dependent on the DWN period.
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