Charge order at high temperature in cuprate superconductors studied by resonant X-ray scattering
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ONLINE
High Tc superconductivity in cuprates is possibly the oldest unresolved problems of modern condensed matter physics. Countless theoretical and experimental techniques have been employed and refined to delightful levels of sophistication in the hope of solving it. So far these efforts have indeed uncovered many exotic properties of cuprates, summarized in a rich phase diagram that tells us of competing and entwined orders. An important contribution has coming from X-ray scattering performed at a well-chosen absorption resonance, which has revealed the existence of charge density waves in hole doped superconducting compounds at low temperatures. More recently energy loss X-ray measurements, called RIXS for Resonant Inelastic X-ray Scattering, have shown that charge density fluctuations and excitations are also present, pervading a large part of the phase diagram. These observations help understanding the bad metal behavior in the normal state and, possibly, the superconducting mechanisms. I will present some of the recent results in this field, starting from a short introduction of cuprates and of the RIXS technique.
Giacomo Ghiringhelli is Full Professor of Experimental Physics at the Politecnico di Milano in Italy. In the past 20 years, he has led the development of soft x-ray RIXS in collaboration with synchrotron facilities in Europe and was awarded the Europhysics Prize of the Condensed Matter Division of the European Physical Society in 2018. His scientific interests include the study of magnetic and electronic properties of high-Tc superconductors and other quantum materials by resonant x-ray scattering and x-ray absorption spectroscopy.
Tencent/Voov Meeting Link: https://meeting.tencent.com/s/MX8iqVtxKlRw
Meeting ID: 841490855 Password: 123456
Venue: TDLI Meeting Room 300
