Bi2Sr2CaCu2O8+δ (Bi2212) has been known as a high-Tc superconductor with van der Waals layer structure. Efforts have been made to electrostatically modulate the superconductivity of Bi2212. Due to its electron-beam sensitive nature and inaccessibility within an electric-field gating device, it is a big challenge to directly examine the variation in crystal phase and correlate it with elemental modulation. In this work, we have made it possible by combining an ex-situ electrochemical process and CryoTEM to visualize the incommensurate structure of Bi2212 and the phase modification by lithium.About the presenter
Peng Liu is a Research Associate with CI Xiaolin Wang at the University of Wollongong. He works within FLEET’s Research theme 1 and Enabling technology theme A. He is exploring the structural and transport properties of 2D superconducting materials, with focus in electric-field gating and transmission electron microscopy.