1. Physical and Computational Sciences Directorate, Pacific Northwest National Laboratory, Richland, Washington 99352, United States
2. Energy and Environment Directorate, Pacific Northwest National Laboratory, Richland, Washington 99352, United States
3. Department of Physics, University of Washington, Seattle, Washington 98195, United States
4. Metallurgical and Materials Engineering, Colorado School of Mines, Golden, Colorado 80401, United States