Friedel Oscillations in Graphene: from flawed DFT Calculations to Sublattice Segregation of Dopants

Data: 
28/11/2014 - 15:00 até 16:00
Palestrante: 
Prof. Dr. Mauro Ferreira dos Santos / School of Physics and CRANN, Trinity College Dublin, Ireland
Local: 
Sala de Seminários José Roberto Leite - Ed. Alessandro Volta (bloco C) - andar térreo
Resumo: 
Abstract: Friedel oscillations are fluctuations on the local density of 
states that arise whenever the underlying symmetry of a material is broken.
While such oscillations are ubiquitous in many nanoscale structures, 
they may be hidden in graphene-based materials due to the peculiar symmetry
of these systems. We argue that these unusual features may: (i) have an 
impact in Density Functional Theory (DFT) calculations in graphene and (ii)
explain the sublattice asymmetry seen in doped graphene structures.

Meeting schedule: there will be a limited number of appointments.
Interested graduated students should manifest ASAP. Starts at 13:45.

13:45 to 14:45 (taken by the Gregório group)

15:00 to 15:50 (free, trying two 20 minutes section)

16:00 to 17:00 seminar and discussion

17:00 to 18:00 ("free")