1. Department of Physics Indiana University Bloomington IN 47405 USA
2. Department of Mechanical Engineering Vanderbilt University Nashville TN 37235 USA
3. Department of Physics Incheon National University Incheon 22012 Korea
4. Electron Microscopy Center Indiana University Bloomington IN 47405 USA
5. Department of Mechanical and Materials Engineering University of Nebraska Lincoln NE 68588 USA
6. Center for Integrated Nanotechnologies, MPA Division Los Alamos National Laboratory Los Alamos 87545 United States
7. Department of Electrical and Computer Engineering and Texas Center for Superconductivity (TcSUH) University of Houston Houston TX 77204 USA
8. Department of Physics Virginia Tech Blacksburg VA 24061 USA
9. Department of Materials Science and NanoEngineering Rice University Houston TX 77005 USA