1. Departamento de Física Teórica e Experimental Universidade Federal do Rio Grande do Norte Natal‐RN 59072‐970 Brazil
2. Institute of Mathematics and Computer Sciences University of São Paulo São Carlos São Paulo 13566‐590 Brazil
3. Laboratory of Bio‐inspired, Bionic, Nano, Meta Materials & Mechanics, Department of Civil, Environmental and Mechanical Engineering University of Trento Trento 38123 Italy
4. School of Engineering and Materials Science Queen Mary University of London London E1 4NS UK
5. Instituto de Física “Gleb Wataghin,” Universidade Estadual de Campinas C. P. 6165 Campinas SP 13083‐970 Brazil