1. Department
of Chemistry, Jadavpur University, Kolkata 700 032, India
2. Department
of Physics, University of Central Florida, Orlando, Florida 32816, United States
3. National
High Magnetic Field Laboratory (NHMFL), Florida State University, Tallahassee, Florida 32310, United States
4. Department
of Physics, Florida State University, Tallahassee, Florida 32310, United States