Novel Topological Structures at Twisted Ferroelectric Interfaces

Session Information

Location: amf. P7 | "Gheorghe Asachi" Technical University of Iași (TUIAȘI)
Day: 3. Wednesday 17
Time: 10:30-11:30
Chairperson: Paul Gavriloaea

Presentation Details

Presentation Type: Oral presentation
Title: Novel Topological Structures at Twisted Ferroelectric Interfaces
Abstract: We have been examining the combined effect of polar discontinuities and crystallographic twist on the properties of bonded ferroelectric interfaces (specifically lithium niobate). Two interesting observations have been made: firstly, that emergent 2D conductivity can be shut down at specific twist angles at which there is a sparsity in the interfacial coincident lattice. secondly, that interfacial nanoscale arrays of structural and dipolar helices emerge with distinct chiral properties. While such structures might be expected from twist alone, it seems that the intensity of their dichroic response is dramatically enhanced because of the polar discontinuity.

Presenter

Prof Marty Gregg
Queen's University Belfast | United Kingdom

Authors

1. Gregg, Marty | School of Mathematics and Physics, Queen's University Belfast