Precise engineering of quantum dot array coupling through their barrier widths

Piquero-Zulaica, I. ; Lobo-Checa, J. (Universidad de Zaragoza) ; Sadeghi, A. ; El-Fattah, Z.M.A. ; Mitsui, C. ; Okamoto, T. ; Pawlak, R. ; Meier, T. ; Arnau, A. ; Ortega, J.E. ; Takeya, J. ; Goedecker, S. ; Meyer, E. ; Kawai, S.

Resumen: Quantum dots are known to confine electrons within their structure. Whenever they periodically aggregate into arrays and cooperative interactions arise, novel quantum properties suitable for technological applications show up. Control over the potential barriers existing between neighboring quantum dots is therefore essential to alter their mutual crosstalk. Here we show that precise engineering of the barrier width can be experimentally achieved on surfaces by a single atom substitution in a haloaromatic compound, which in turn tunes the confinement properties through the degree of quantum dot intercoupling. We achieved this by generating self-assembled molecular nanoporous networks that confine the two-dimensional electron gas present at the surface. Indeed, these extended arrays form up on bulk surface and thin silver films alike, maintaining their overall interdot coupling. These findings pave the way to reach full control over two-dimensional electron gases by means of self-assembled molecular networks.

Idioma: Inglés

DOI: 10.1038/s41467-017-00872-2

Año: 2017

Publicado en: Nature Communications 8, 1 (2017), [6 pp]
ISSN: 2041-1723

Factor impacto JCR: 12.353 (2017)

Categ. JCR: MULTIDISCIPLINARY SCIENCES rank: 3 / 64 = 0.047 (2017) - Q1 - T1

Factor impacto SCIMAGO: 6.582 - Biochemistry, Genetics and Molecular Biology (miscellaneous) (Q1) - Physics and Astronomy (miscellaneous) (Q1) - Chemistry (miscellaneous) (Q1)

Financiación: info:eu-repo/grantAgreement/EUR/COST/MP1303
Financiación: info:eu-repo/grantAgreement/ES/ERC/CSIC-201560I022
Financiación: info:eu-repo/grantAgreement/ES/MINECO/FIS2013-48286-C2-1-P
Financiación: info:eu-repo/grantAgreement/ES/MINECO/MAT2013-46593-C6-4-P
Financiación: info:eu-repo/grantAgreement/ES/MINECO/MAT2016-78293-C6-6R

Tipo y forma: Article (Published version)

Área (Departamento): Área Física Materia Condensada (Dpto. Física Materia Condensa.)