19th CEMS Colloquium

講演者

有田亮太郎 (創発物性科学研究センター計算物質科学研究チームチームリーダー)

日程

2014年7月30日(水) 17:30～18:30

開催場所

理化学研究所　大河内記念ホール

講演タイトル

鉄系超伝導体の超伝導発現機構

講演概要

Since the seminal discovery of superconductivity in F-doped LaFeAsO, iron-based compounds have provided us a rich playground to explore the mechanism of unconventional superconductivity in strongly-correlated electron systems. Trailing behind the cuprates, these compounds have the second highest superconducting transition temeprature. The microscopic “glue” of these superconductors that binds electrons into the Cooper pairs is still controversial and there have been hot debates on two possible scenarios. One is spin-fluctuation-mediated superconductivity, and the other is orbital-fluctuation-mediated superconductivity. In this talk, after a brief review on these two mechanisms and recent progress in first-principles methods to study unconventional superconductivity, I will discuss which scenario is more strongly supported by non-empirical calculations.