RT Journal Article
T1 Polar discontinuities, emergent conductivity, and critical twist-angledependent behaviour at wafer-bonded ferroelectric interfaces
A1 Rogers, Andrew
A1 Holsgrove, Kristina
A1 Schafer, Nils A.
A1 Koppitz, Boris
A1 Mccluskey, Conor J.
A1 Yedama, Shivani
A1 Lynch, Ronan
A1 Sloan, Keelan
A1 Porter, Barry
A1 Sykes, Adam
A1 Catalan Daniels, Alex
A1 Silva Jr, Romualdo S.
A1 Bruno, Flavio Yair
A1 Seddon, Sam D.
A1 Lu, Haidong
A1 Ruesing, Michael
A1 Fink, Christa
A1 Fahler-Muenzer, Philipp
A1 Fearn, Sarah
A1 Heutz, Sandrine E. M
A1 Hadjimichael, Marios
A1 Ramasse, Quentin M.
A1 Alexe, Marin
A1 Kumar, Amit
A1 Mcquaid, Raymond G. P.
A1 Gruverman, Alexei
A1 Sanna, Simone
A1 Eng, Lukas M
A1 Gregg, J. Marty
AB Probing novel properties, arising from twisted interfaces, has traditionally relied on the stacking of exfoliated two-dimensional materials and the spontaneous formation of van der Waals bonds. So far, investigations involving intimate covalent or ionic bonds have not been a focus. Yet, we show here that an established technique, involving thermocompressional wafer bonding, works well for creating twisted non-van der Waals interfaces. We have successfully bonded z-cut lithium niobate single crystals to create ferroelectric oxide interfaces with strong polar discontinuities and have mapped the associated emergent interfacial conductivity. In some instances, a dramatic change in microstructure occurs, involving local dipolar switching. A twist-induced collapse in the capability of the system to effec8tively screen interfacial bound charge is implied. Importantly, this only occurs around specific moiré twist angles with sparse coincident lattices and associated short-range aperiodicity. In quasicrystals, aperiodicity is known to induce pseudo-bandgaps and we suspect a similar phenomenon here.
PB Nature Research
YR 2026
FD 2026-01-23
LK https://hdl.handle.net/20.500.14352/133839
UL https://hdl.handle.net/20.500.14352/133839
LA eng
NO Rogers, A., Holsgrove, K., Schäfer, N.A. et al. Polar discontinuities, emergent conductivity, and critical twist-angle-dependent behaviour at wafer-bonded ferroelectric interfaces. Nat Commun 17, 1842 (2026). https://doi.org/10.1038/s41467-026-68553-7
NO ©The Author(s) 2026.Grant USI-205.Grant MR/T043172/1
NO UK Engineering and Physical Sciences Research Council
NO UK Department for the Economy
NO UK Research and Innovation
NO Ministerio de Innovación y Ciencia (España)
NO Agencia Estatal de Investigación (España)
NO European Commission
NO Deutsche Forschungsgemeinschaft
DS Docta Complutense
RD 21 mar 2026