Sujaul Chowdhury (s.chowdhury-phy@sust.edu) is a Professor in Department of Physics, Shahjalal University of Science and Technology (SUST) www.sust.edu, Sylhet 3114, Bangladesh. He obtained B.Sc. (Honours) in Physics in 1994 and M.Sc. in Physics in 1996 from SUST. He obtained Ph.D. in Physics from The University of Glasgow, U.K. in 2001. He was a Humboldt Research Fellow for one year at The Max Planck Institute for Solid State Research, www.fkf.mpg.de, Stuttgart, Germany under Professor Dr. Klaus von Klitzing. Dr. Chowdhury has a glorious record of academic, scientific, teaching and research achievements; details are in http://schowdhury-phy.weebly.