Affiliation:
1. Delft University of Technology
2. International Iberian Nanotechnology Laboratory
3. University of Alicante
Abstract
The interaction of electrons with a periodic potential of atoms in
crystalline solids gives rise to band structure. The band structure of
existing materials can be measured by photoemission spectroscopy and
accurately understood in terms of the tight-binding model, however not
many experimental approaches exist that allow to tailor artificial
crystal lattices using a bottom-up approach. The ability to engineer and
study atomically crafted designer materials by scanning tunnelling
microscopy and spectroscopy (STM/STS) helps to understand the emergence
of material properties. Here, we use atom manipulation of individual
vacancies in a chlorine monolayer on Cu(100) to construct one- and
two-dimensional structures of various densities and sizes. Local STS
measurements reveal the emergence of quasiparticle bands, evidenced by
standing Bloch waves, with tuneable dispersion. The experimental data
are understood in terms of a tight-binding model combined with an
additional broadening term that allows an estimation of the coupling to
the underlying substrate.
Funder
FP7 People: Marie-Curie Actions
Ministerio de Educación y Cultura - Spain
Nederlandse Organisatie voor Wetenschappelijk Onderzoek
Subject
General Physics and Astronomy
Cited by
22 articles.
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