From July 18 -20, Prof. Moses Chan, member of the American Academic Sciences, the first director of Nanoscale Science Center in Pennsylvania State University paid a tour to High Magnetic Field Lab. Chinese Academy of Sciences in Hefei and presented a lecture entitled: Superconductivity in Nanowires: Macroscopic Quantum Tunneling.　　

　　In his talk, he presented evidence of individual quantum phase slips (QPS), quantum mechanical tunneling events that gives rise to momentarily electrical resistance in superconducting aluminum nanowires. QPS appear as stochastic switching from deep in the superconducting state to the normal resistive state upon the injection of a discrete current pulse. QPS are seen only in the low temperature limit when the electrodes contacting the wires are superconducting. When the electrodes are normal at a higher temperature, QPS are suppressed. This is the case because the normal electrodes provide a dissipative environment, a la the Calderia-Leggett model of quantum tunnelling, that stabilize the superconducting state of the nanowires. Prof. Chan’s talk His speech was very interesting and vivid, attracted our attendance a lot. Furthermore, he was also extremely impressed by the great progress of the construction of our CHMFL and the achievement in research..

　　Prof. Moses Chan received his Ph.D from Cornell University in 1974. He became Evan Pugh Professor the highest honor in Penn State Univ. since 1994, He became a fellow of the American Physical Society in 1987 , a member of the American Academy of Science in 2000 and a fellow of American Association for the Advancement of Sciences in 2007. He Was awarded the 16th Fritz London Memorial Prize in 1996. He served as an associate editor of Physical Review Letters for many years and was pointed as the Overseas science and technology advisory and consultative experts by Hong Kong SAR Government. Prof. Moses Chan had made outstanding contributions to the fundamental research in Condensed matter physics. His numerous achievements appear in major publications such as Nature, Science, Nature Physics and Physical Review Letters. 

Prof. Moses Chan on lecture in CHMFL（Imaged by FP）

Visit Prof. Mingliang Tian's Laborary　（Imaged by FP）