1. CNR NANOTEC—Institute of Nanotechnology, Via per Monteroni, 73100 Lecce, Italy
2. Department of Mathematics & Physics E. de Giorgi, University of Salento, Via Arnesano, 73100 Lecce, Italy
3. Department of Mechanics, Mathematics and Management and Centre of Excellence for Computational Mechanics (CEMeC), Politecnico di Bari, 70125 Bari, Italy
4. CNR STIIMA—Institute of Intelligent Industrial Systems & Technologies, Via P Lembo 38-F, 70124 Bari, Italy
5. STMicroelectronics S.r.l., Via Olivetti 2, 20864 Agrate Brianza, Italy