Speaker: Jiajia Wen, SLAC
Program Description:
How does high temperature (high-Tc) superconductivity arise in cuprate superconductors remains one of the longstanding puzzles in condensed matter physics. Addressing this problem can lead to desirable superconducting materials for next technological revolution in energy and information. Recent ubiquitous observations of charge density wave (CDW) order across different families of cuprate superconductors suggests that understanding its interplay with superconductivity is important. In this talk, I will discuss our recent efforts in using state-of-the-art x-ray scattering techniques at SSRL and LCLS to elucidate the perplexing CDW behavior in cuprate superconductor La2-xSrxCuO4. We identify two types of CDW orders in La2-xSrxCuO4, which provides support for a common mechanism underlying seemly different CDW behaviors in different cuprate materials. Further, by performing x-ray measurements in high magnetic fields, we uncover a strong response of the CDW order to mobile superconducting vortices, linking CDW amplitude to local superconducting pairing.
