Department of Physics and Texas Center for Superconductivity(TcSUH), University of Houston, Houston, TX 77204, USA
Materials Science and Engineering Program, University of Houston, Houston, TX 77204, USA
College of Physical Science and Technology, Central China Normal University, Wuhan 430079, China
Wuhan National Laboratory for Optoelectronics, Huazhong University of Science and Technology, Wuhan 430074, China
Department of Chemistry, University of Houston, Houston, Texas 77204, USA
