1. a National High Magnetic Field Laboratory , Florida State University , Tallahassee , Florida , 32306-4005 , USA
2. b Department of Physics and Astronomy , Louisiana State University , Baton Rouge , Louisiana , 70803-4001 , USA
3. c Department of Physics , University of Florida , Gainesville , Florida , 32611-8440 , USA
4. d Department of Physics , University of Virginia , Charlottesville , Virginia , 22901 , USA
5. e Department of Chemistry , Marshall University , Huntington , West Virginia , 25755-2520 , USA