University of California, Riverside

Department of Electrical and Computer Engineering

A Talk on “Shining X-ray Light on Strongly Correlated Materials ” Presented by Dr. Cheng-Chien Chen

A Talk on “Shining X-ray Light on Strongly Correlated Materials ” Presented....

A Talk on “Shining X-ray Light on Strongly Correlated Materials ” Presented by Dr. Cheng-Chien Chen

March 2, 2016 - 2:10 pm
Bourns A265


Strongly correlated materials can exhibit intriguing phenomena such as superconductivity, quantum magnetism, and topological order. These systems have various potential applications, and X-ray spectroscopies are widely employed to characterize their properties. Here I will present X-ray simulations in three correlated transition metal oxides. I will first discuss using X-rays to study the electronic and surface structures of TiO2 nanoparticles. I will next consider a pressure-induced monoclinic V2O3 metal, whose X-ray Raman spectra highlight electron screening in driving the material’s metal-insulator-transition. I will last talk about dynamical spectral weight transfers in La2CuO4, which confirms the compound’s correlated nature and the continuation of effective singlet quasiparticles. I will conclude by describing research plans for modeling correlated electrons with predictive power and simulating their non-equilibrium dynamics in ultrafast spectroscopies. Along with experimental progress, these studies show that development in theoretical spectroscopy and computational method could substantially advance research in complex quantum materials.



 Dr. Cheng-Chien Chen received his PhD in physics from Stanford University in 2011. Afterwards he became a postdoctoral scholar at SLAC National Accelerator Laboratory and later an Aneesur Rahman Postdoctoral Fellow at Argonne National Laboratory. His research concerns modeling spin and electron dynamics of strongly correlated systems in various spectroscopic measurements. Using large-scale computation and advanced numerical techniques, Dr. Chen has actively led theory projects and extensively collaborated with experimentalists across disciplines. His research goal is to explain and predict the behavior of complex quantum materials relevant to both fundamental sciences and applications.

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