Associate Staff Scientists
Dr. Yulin Chen
My interest on experimental condensed matter physics is to study novel quantum materials, the topological insulators and highly correlated electronic systems by means of photoemission spectroscopy. My current research activities include the following aspects: Academically, I'm investigating various topological insulators such as (Bi/Sb)2(Te/Se)3 system, and a multi-layer high-Tc superconductor family (Ba2Ca3Cu4O8(OxF1-x)2) that exhibits exotic electronic properties against the common sense. Technologically, I'm developing our time- and spin-resolved photoemission spectrometer as well as a novel 3D time of flight electron analyzer, which will not only give us the capability to detect the spin of electrons (which is crucial to study magnetic materials), but also extend our study from equilibrium state to electron dynamics.
Dr. Wei-Sheng Lee
I am interested in learning the underlying physics of strongly correlated materials through spectroscopic tools, which normally reveal lots of microscopic information of the electronic states. As an extension of my Ph. D. thesis work, I continue to explore the physics of high-Tc cuprates using the ultra-high resolution angle-resolved photoemission spectroscopy. The much improved resolution not only could lead to new discoveries, but also make possible a more quantitative analysis of the ARPES data. The other very exciting project I am working on is to explore the possibility of using the LCLS to do optical pump and X-ray probe experiments. New insight could be revealed via studying how the electronic state relaxes from an excited state back to the ground state.
