[1] IBM Res, Semicond Res Corp, NRI, Durham, NC USA
[2] IBM Res, Semicond Res Corp, Nanoelect Comp Res nCORE Programs, Durham, NC USA
[3] Univ Notre Dame, Dept Comp Sci & Engn, Notre Dame, IN 46556 USA
[4] Univ Notre Dame, Dept Elect Engn, Notre Dame, IN 46556 USA
[5] Univ Notre Dame, Notre Dame, IN 46556 USA