1. Department of Physics, South Dakota School of Mines and Technology, 501 East Saint Joseph Street, Rapid
City, South Dakota 57701, United States
2. Department of Physics − 1105, Washington University, One Brookings Drive, St. Louis,
Missouri 63130, United States
3. Department of Hydrogen and Metallurgy Science, Sandia National Laboratories, Livermore, California 94551,
United States