Regensburg 2016 – scientific programme
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O: Fachverband Oberflächenphysik
O 68: Nanostructures at Surfaces: 1D, 2D Structures and Networks
O 68.1: Poster
Wednesday, March 9, 2016, 18:15–20:30, Poster A
Electronic structure of semiconductor superlattices — •Marlou Slot1, Jaco Geuchies1, Joep Peters1, Efterpi Kalesaki2,3, Christophe Delerue3, Ingmar Swart1, and Daniel Vanmaekelbergh1 — 1Condensed Matter and Interfaces, Utrecht University, Utrecht, the Netherlands — 2Physics and Materials Science Research Unit, University of Luxembourg, Luxembourg, Luxembourg — 3IEMN - Département ISEN, UMR CNRS 8520, Lille, France
In the search for materials for (opto-)electronic applications, two-dimensional metal chalcogenide semiconductors have emerged as high-potential candidates. In addition to the atomic structure, the nanoscale lattice of the material has a significant influence on the electronic band structure. Oriented attachment of colloidal nanocrystals results in atomically coherent semiconductor superlattices with a long-range square or honeycomb periodicity. [1] Tight-binding calculations predict a rich electronic structure that is determined by strong electronic coupling between the periodically arranged nanocrystals. [2,3] Using scanning tunneling spectroscopy, we studied the local density of states of the superlattices.
1. W.H. Evers et al., Nano Lett. 13, 2317 (2013).
2. E. Kalesaki et al., Phys. Rev. B 88, 115431 (2013).
3. E. Kalesaki et al., Phys. Rev. X 4, 011010 (2014).