1. Department of Physics, Universidade Federal de Pernambuco, Recife, 50740-540, Pernambuco, Brazil
2. Department of Chemistry, Faculdade de Filosofia, Ciências e Letras de Ribeirão Preto, Universidade de São Paulo, Ribeirão Preto, 14040-900, São Paulo, Brazil
3. School of Physics and Astronomy, Monash University, Clayton, Victoria, 3800 Australia
4. Department of Physics, Imperial College London, SW7 2AZ London, United Kingdom
5. Chair in Hybrid Nanosystems, Nanoinstitute Munich, Faculty of Physics, Ludwig-Maximilians-Universität München, München, 80539, Bavaria, Germany
6. Center for Nanoscience (CeNS), Ludwig-Maximilians-Universität München, 80539 München, Germany