[1] Univ Minho, Ctr Phys, P-4169007 Oporto, Portugal
[2] Univ Porto, P-4169007 Oporto, Portugal
[3] Univ Minho, Dept Phys, Campus Gualtar, P-4710057 Braga, Portugal
[4] Boston Univ, Dept Phys, 590 Commonwealth Ave, Boston, MA 02215 USA
[5] Inst Basic Sci IBS, Ctr Theoret Phys Complex Syst, Daejeon 34126, South Korea
[6] Univ Lisbon, Inst Super Tecn, CeFEMA, Av Rovisco Pais, P-1049001 Lisbon, Portugal