<h3>Qi-Kun XUE</h3>

Qi-Kun XUE

Tsinghua University, China

Plenary Lecture | Thursday, 22 June 2017 | 08:30 – 09:15 hrs

On the Superconducting Mechanism of
Unconventional High Temperature Superconductor Materials

We investigate the pairing mechanism of high Tc superconductivity in cuprates and Fe-based pnictides by using state-of-the-art molecular beam epitaxy (MBE)-scanning tunneling microscopy (STM). By two different approaches in sample preparation, namely Ar+ ion bombardment and ozone-assisted MBE growth, we are able to study the gap structure of superconducting copper oxide and iron selenide planes in unprecedented way directly by STM. We show that the pairing symmetry in cuprates and pnictides is isotropic, and that their unique layered structure plays the most crucial role in the high temperature superconductivity.