Abstract:
The Kondo effect is a long-standing paradigmatic many-body problem in condensed matter physics. The recent progresses in nanoscience and technology has further made possible new realizations of exotic Kondo physics. In this talk, I will discuss some experimental aspects of (1) the standard Kondo effect due to the existence of isolated localized spin-half magnetic moments, and (2) the two-impurity Kondo effect featured quantum critical behaviors of the transport properties. Lastly, (3) I will discuss our observation of nonmagnetic Kondo effect due to two-level tunneling systems. In the last case, the Kondo physics originates from the coupling of the electronic orbital wave-functions with dynamical structural defects.
Brief Bio:
Professor Juhn-Jong Lin obtained his BS degree from National Chiao Tung University (NCTU) in 1979. He obtained his PhD degree from Purdue University (USA) in 1986. He was an associate professor and a professor in the Department of Physics at National Taiwan University from 1988 to 1997. He joined the Institute of Physics at NCTU in 1997. His research efforts focus on low temperature physics, mesoscopic physics, nanoscale physics, and disordered electronic systems.