| Autor: |
Enaldiev, V. V., Ferreira, F., Fal'ko, V. I. |
| Rok vydání: |
2021 |
| Předmět: |
|
| Zdroj: |
Nano Letters (2022) |
| Druh dokumentu: |
Working Paper |
| DOI: |
10.1021/acs.nanolett.1c04210 |
| Popis: |
Moir\'e structures in small-angle-twisted bilayers of two-dimensional semiconductors with a broken-symmetry interface form arrays of ferroelectric 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 and show that it undergoes a qualitative change, after the arcs of partial dislocation like domain walls merge (near the network nodes) into streaks of perfect screw dislocations, which happens at a threshold displacement field dependent on the DWN period. |
| Databáze: |
arXiv |
| Externí odkaz: |
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