1. Department of Chemistry and Biochemistry, Florida State University, Tallahassee, Florida 32306, United States
2. Department of Physics, Banaras Hindu University, Varanasi, 221005, India
3. Laboratory for Surface Science and Technology and Department of Physics and Astronomy, University of Maine, Orono, Maine 04469, United States
4. National High Magnetic Field Laboratory, Tallahassee, Florida 32310, United States