Berlin 2018 – wissenschaftliches Programm
Bereiche | Tage | Auswahl | Suche | Aktualisierungen | Downloads | Hilfe
O: Fachverband Oberflächenphysik
O 23: Focus Session: Molecular Nanostructures on surfaces - New Concepts towards Complex Architectures II
O 23.6: Vortrag
Dienstag, 13. März 2018, 12:00–12:15, MA 004
Quantum dot coupling modification through barrier width in organo-halide arrays — •Jorge Lobo-Checa1, Ignacio Piquero-Zulaica2, Ali Sadeghi3, Zakaria M. Abd El-Fattah2, Toshihiro Okamoto4, and Shigeki Kawai5 — 1Instituto de Ciencia de Materiales de Aragón (ICMA), CSIC-Univ. Zaragoza, Spain — 2Centro de Física de Materiales, CSIC/UPV-EHU. San Sebastian, Spain — 3Department of Physics, Shahid Beheshti Univ., Iran — 4Department of Advanced Materials Science, Univ. Tokyo, Japan — 5International Center for Materials Nanoarchitectonics, NIMS, Japan
Quantum dot (QD) arrays on surfaces, in the form of nanoporous networks, are candidates for studying fundamental physical phenomena such as 2DEG confinement. Tunability has been accomplished by varying the pore size, geometrical shape and molecule substrate interactions. Moreover, inter-dot coupling is validated by photoemission through the generation of new dispersive bands and modulated through thermodynamics and the condensation of guest elements.
Here, we validate the 2DEGs' modification through inter-dot barrier width by STM/STS/AFM, ARPES and extended model calculations. We engineer the inter-dot barrier width by substitution of a single atom in a haloaromatic compound and tune the confinement properties at each nanopore, affecting the degree of QD intercoupling both on bulk and thin Ag films alike [1].
[1] I. Piquero-Zulaica et al., Nat. Commun. 8, 787 (2017).