Raising the superconducting transition temperature to a point where applications are practical is one of the most important challenges in science. In 1986 a family of superconducting materials, namely the copper-oxide superconductors, was discovered. To date, the highest transition temperature is ~140K. However, despite unprecedented research efforts, the precise cause of the high transition temperature is still controversial. In 2012 a new interface high-temperature superconducting system was discovered. This system is based on entirely different materials. However, it shares many common features with the copper-oxide superconductors. Moreover, the reason underlies its high transition temperature has been found in the last few years. In this talk, I shall explain the mechanism for strong Cooper pairing in this system and what it teaches us about finding even higher temperature superconductors.

报告人简介
Professor Dung-Hai Lee received his B.S. degree from the National Tsinghua University of Taiwan. He went to the Massachusetts Institute of Technology in 1977 for graduate studies, and received his Ph.D. in physics in 1982. After staying at M.I.T. for another two years, he joined the IBM T.J. Watson Research Center in 1984, where he remained as a Research Staff Member until 1994. Since 1994, he has been a professor in the Physics Department of the University of California, Berkeley. Professor Lee’s main research interest is in strongly correlated many-particle systems. He has contributed to the fields of magnetism and superconductivity and the study of quantum Hall systems and classical and quantum phase transitions. His current interest is in the physics of novel superconductors and topological states in condensed matter systems.