Pairing in KFe2Se2 and KFe2As2

• 作 者: Qiang-Hua Wang
• 机 构: National Laboratory of Solid State Microstructures, Nanjing University, Nanjing 210093,China
• 出 处: 中国物理学会2011年秋季学术会议
• 发表日期: 2011年9期

We obtain the band structures of new superconductors KFe2Se2 and KFe2As2 using first principle calculations,and construct effective tight binding models thereafter.We then study the pairing,spin density wave and charge density wave instabilities with reasonable local interactions,using two versions of functional renormalization group.Possible pairing symmetries and the relation to spin and charge density fluctuations are discussed.