ABSTRACT
Non-trivial topology offers ways to generate exotic superconductivity. In this talk, I will demonstrate how these exotic superconductivities arise in topological materials. Specifically, I will first show that non-trivial topology can be used to create flat bands in graphene, which can host d-wave superconductivity with much enhanced transition temperatures. Secondly, by using surface states resulting from non-trivial topology in topological insulators with nano-flake geometry, it is possible to tune the nano-flake topological insulators into topological superconductors through changes in the thickness of nanoflakes. In addition, I will show that for superconductivity to occur on surfaces of topological insulators, it is possible to generate superconducting vortices spontaneously through the curvature of the surface without the presence of external magnetic fields. Furthermore, each of the vortex hosts a Majorana zero mode inside its core, providing a platform for topological quantum computation. Finally, I will present preliminary data showing that the long-sought super-solid phase in helium can actually be realized as a superconducting solid phase in a low-dimensional electronic system. This exotic superconducting phase, if it is confirmed, will be a new type of superconducting state.
BIOGRAPHY
Prof. Chung-Yu Mou is the Dean of the College of Science at National Tsing Hua University (NTHU), Taiwan, where he is also a Chair Professor in the Department of Physics. He earned his BSc in Physics from National Taiwan University (1986) and PhD from Caltech (1993). Prof. Mou is renowned in theoretical condensed matter physics, particularly for his research on the mechanism of high-temperature superconductivity, the physics of type-II superconductors, midgap states, and their topological origins.
His academic leadership includes roles as Director of the Center for Quantum Technology and former Chairman of the Department of Physics at NTHU, as well as Director of the Physics Research Promotion Center and Division Head at the National Center for Theoretical Sciences in Taiwan. Prof. Mou’s research is marked by innovative approaches such as the generalized method of image for tunneling experiments, and pivotal work in edge-state physics and supersymmetry in nanowires.
As an educator, Prof. Mou has designed and taught foundational courses in quantum mechanics, condensed matter physics, electromagnetism, and statistical mechanics, inspiring students across all levels. He is also a prolific researcher, with influential publications on Rashba splitting, topological superconductors, and unconventional quantum phenomena. Through leadership and research, Prof. Mou has made outstanding contributions to advancing physics in Taiwan and on the international stage.
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