Research in the Gweon Group
Strange ARPES line shapes and ECFL
Ever since high temperature superconductors have been discovered by scientists, these materials have been quite baffling, to say the least. The central question is whether the standard textbook theories that we know and love already are applicable to these fascinating materials. The general sense is that those standard theories must be augmented to a great extent, if not replaced completely. Why? It is because of many puzzling experimental results that defy a proper understanding so far. ARPES results are among the most mysterious!
As the above advertisement (at Stanford Synchrotron) says, we might be onto solving this conundrum! Major help came from a theoretical breakthrough (ECFL) by Shastry, which seemed to shed light on a long-standing puzzle in high temperature superconductivity in a big way—explaining anomalous ARPES line shapes. But this is not all. Follow the links below, to see how this initial model (simple ECFL) had to be modified to explain more data and to shed light on the superconductivity.
Links, data
The paper can be accessed from here or here (public).
My invited talk at the March meeting 2012: abstract and presentation
A news article about our work at the Stanford Synchrotron Lightsource
A science highlight article about our work at the Stanford Synchrotron Lightsource
- The UCSC data analyzed in this paper were obtained by GHG at the SSRL.