讲座标题： 【数理学院】Quantum states of matters probed by photoemission spectroscopy and some of their applications in energy
主讲人： Worawat Meevasana
By using angle resolved photoemission spectroscopy, we have explored the richness of quantum states of materials ranging from metal oxides, transition metal chacogenides and carbon-based molecules so called diamondoid. In this talk I will focus on the 2D electron states at oxides and chacogenides where we find the interplay between charge, spin and orbitals suggesting the conceptual usage in spontronics and valleytronics. Counter intuitive effects such as negative electronic compressibility and negative electron affinity which may find applications in solar cell and energy storage applications, will also be described.
Worawat Meevasana, School of Physics, Institute of Science, Suranaree University of Technology, Thailand. He obtained his B.Sc. and Ph.D. in physics from UC Santa Barbara and Stanford University respectively. By using synchrotron radiation techniques, especially angle resolved photoemission spectroscopy, his research has focused on probing electronic structures of materials ranging from high Tc superconductors, 2D electron gases at oxide surfaces, transition metal chacogenides and diamondoid molecules. He has published over 50 papers; many are in high impact factor journals such as Nature Materials, Nature Nanotechnology, Physical Review Letters and Nano Letters. Recently Worawat has interests in applying these knowledges to solar cell and energy storage applications.