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Discrete Electronic Subbands due to Bragg Scattering at Molecular Edges

AuthorsMartín-Jiménez, Alberto; Gallego, José M. ; Miranda, Rodolfo ; Otero, Roberto
KeywordsBragg Scattering
Discrete Electronic Subbands
Molecular Edges
Physical properties
Issue Date2019
PublisherAmerican Physical Society
CitationPhysical Review Letters 122 (2019)
Abstract[EN] The discretization of the electronic structure of nanometer-size solid systems due to quantum confinement and the concomitant modification of their physical properties is one of the cornerstones for the development of nanoscience and nanotechnology. In this Letter we demonstrate that the Bragg scattering of Cu(111) surface-state electrons by the periodic arrangement of tetracyanoquinodimethane molecules at the edges of self-assembled molecular islands, along with the dominant contribution of backscattering processes to the electronic density of states, discretizes the possible values of the electron momentum parallel to the island edge. The electronic structure consists thus of a discrete number of subbands which occur in a nonclosed space, and therefore without quantum confinement.
Publisher version (URL)http://dx.doi.org/10.1103/PhysRevLett.122.176801
Identifiersdoi: 10.1103/PhysRevLett.122.176801
e-issn: 1079-7114
issn: 0031-9007
Appears in Collections:(ICMM) Artículos
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