1. Interdisciplinary
Materials Science, Vanderbilt University, Nashville, Tennessee 37235-0106, United States
2. Center
for Functional Nanomaterials, Brookhaven National Laboratory, Upton, New York 11973, United States
3. Department
of Physics and Astronomy, Vanderbilt University, Nashville, Tennessee 37235-1807, United States
4. Department
of Physics, The University of Alabama, Birmingham, Alabama 35294, United States
5. Center
for Integrated Nanotechnologies, Los Alamos National Laboratory, Los Alamos, New Mexico 87545, United States
6. Materials
Science and Technology Division, Oak Ridge National Laboratory, Oak Ridge, Tennessee 37831, United States
7. Department
of Electrical Engineering and Computer Science, Vanderbilt University, Nashville, Tennessee 37235, United States