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KFM: Fachverband Kristalline Festkörper und deren Mikrostruktur
KFM 6: Poster
KFM 6.8: Poster
Tuesday, March 28, 2023, 17:00–19:00, P3
Fabrication of reproducible, conductive domain walls in lithium niobate — •Julius Ratzenberger1,2, Iuliia Kiseleva1, Peter Hegarty1, Zeeshan Amber1, Michael Rüsing1, and Lukas Eng1,2 — 1Institut für Angewandte Physik, Technische Universität Dresden, 01062 Dresden, Germany — 2ct.qmat: Dresden-Würzburg Cluster of Excellence--EXC 2147, TU Dresden, 01062 Dresden, Germany
In recent years, extensive research on conductive domain walls (CDW) in lithium niobate as possible building blocks for nanoelectronic circuits has been carried out. However, a fundamental understanding of the relationship between poling, and the properties of highly-conductive domains has been missing so to date.
In this work, we systematically investigate the various poling parameters in order to come up with a recipe of how to reproducibly fabricate conductive, hexagonal domains into lithium niobate single crystals. Furthermore, by optimizing the relevant parameters, the CDW is reproducibly enhanced when following the work of Godau et al. [1]. To gain a deeper understanding into the formation of highly-conductive DWs, we apply 3D second-harmonic generation (SHG) microscopy [2] for direct real-space visualization. Our findings provide key insights into the formation of CDW in lithium niobate single crystals.
[1] Ch. Godau et al., ACS Nano 11, 5 (2017).
[2] T. Kämpfe et al., Phys. Rev. B, 89, 035314 (2014).