Electronic correlations and unconventional spectral weight transfer in BaFe_2-xCo_xAs₂

2011/06/15 by A. A. Schafgans, S. J. Moon, Schafgans, A. A. +17
Physics and Astronomy · #FOS: Physical sciences #Strongly Correlated Electrons (cond-mat.str-el) #Superconductivity (cond-mat.supr-con) #cond-mat.str-el #cond-mat.supr-con

paper · pdf · doi:10.48550/arxiv.1106.3114

7 pages, including supplementary materials

arxiv created 2011/06/15 · arxiv updated 2011/06/17

Abstract

We report an infrared optical study of the pnictide high-temperature superconductor BaFe_1.84Co_0.16As₂ and its parent compound BaFe₂As₂. We demonstrate that electronic correlations are moderately strong and do not change across the spin-density wave transition or with doping. By examining the energy scale and direction of spectral weight transfer, we argue that Hund's coupling J is the primary mechanism that gives rise to correlations.

Related

• Charge-doping-induced variation of BaFe₂As₂ electronic structure and the emerging physical effects
• Hole doping and electronic correlations in Cr-substituted BaFe₂As₂
• Strong electron-lattice coupling and orbital fluctuations in iron pnictide superconductor Ba(Fe1-xCox)2As2
• Evidence of a universal relation between electron-mode coupling and Tc in Ba1-xKxFe2As2 superconductor from Laser ARPES
• Nematic Fluctuations and Electronic Correlations in Heavily Hole-Doped Ba_1-xK_xFe₂As₂ Probed by Elastoresistance