1. Department of Materials Science and Engineering; North Carolina State University; Raleigh NC 27695 USA
2. Logic Technology Development; Intel Corporation; Hillsboro OR 97124 USA
3. Department of Physics; North Carolina State University; Raleigh NC 27695 USA
4. Department of Physics; Arizona State University; Tempe AZ 85281 USA
5. Department of Materials Science and Engineering; Carnegie Mellon University; Pittsburgh PA 15213 USA