Spin correlations in graphene nanostructures probed with STM

R. Ortiz (1), *J. Fernández-Rossier (1,2)
(1) Departamento de Física Aplicada, Universidad de Alicante, Spain, (2) INL, Braga, Portugal

In this talk I will discuss the emergence of non-trivial quantum spin correlations in a variety nanographene nanostructures, using a full quantum description based on exact diagonalization of the Hubbard model, in a restricted Hilbert space. In addition, I will present our theoretical understanding of how STM spectroscopy can provide information about the spin excitations in these systems.