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Detecting unitary cells in STM images

Oliveira, J. ; Cardoso, P.C. ; Alcácer, L. ; Morgado, J. ; Ferreira, Q.

Detecting unitary cells in STM images, Proc Conf. on Telecommunications - ConfTele, Aveiro, Portugal, Vol. --, pp. -- - --, September, 2015.

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In this paper we propose an algorithm to detect unitary cells of crystallographic lattices, in images obtained by the scanning tunneling microscopy (STM) technique. To determine the underlying periodic Bravais lattice structure, we use the autocorrelation function of the image. The proposed method is a two step algorithm that works by analysing its local peaks pattern. In the first step the algorithm determine if the underlying Bravais lattice is hexagonal or a 4 side polygon, and in the following step it computes the Bravais lattice’s parameters.