1. 1Department of Electrical and Computer Engineering, Northwestern University, Evanston, Illinois, USA; email: pedram@northwestern.edu
2. 3Department of Materials Science and Engineering, Northwestern University, Evanston, Illinois, USA
3. 2Materials Science Division, Argonne National Laboratory, Lemont, Illinois, USA
4. 4Department of Mathematical and Computer Sciences, Physical Sciences, and Earth Sciences, University of Messina, Messina, Italy