Research Interests and Activities
My current research activities involve the following fields in condensed matter physics: (1) Critical behavior in quantum phase transitions in low dimensions, including quantum Hall effect (QHE) systems, spin-orbit coupling systems, random-magnetic-field systems, and the recently experimentally observed metal-insulator transition at zero magnetic field (B=0) in 2D electron systems; (2) Strongly-correlated electron systems, theoretical study of new kind of ordering and Matter of states; (3) New spin states in various spin models, spin transport, spintronics in various ferromagnetic materials; theoretical understanding and calculation of the colossal magnetoresistance in R1-x Ax MnO3.