1. Department of Computing, Mathematics, and Physics, Messiah University, Mechanicsburg, Pennsylvania 17055
2. Thin Film Physics Division, Department of Physics (IFM), Linköping University, SE-58183 Linköping, Sweden
3. Tandem Laboratory, Uppsala University, Box 529, SE-75120 Uppsala, Sweden
4. Frederick Seitz Materials Research Laboratory and Department Materials Science, University of Illinois, Urbana, Illinois 61801
5. Department of Materials Science and Engineering, National Taiwan University of Science and Technology, Taipei 10607, Taiwan