Document Type

Article

Department/Program

Physics

Journal Title

Physical Review Letters

Pub Date

2012

Volume

108

Issue

14

Abstract

We report an infrared optical study of the pnictide high-temperature superconductor BaFe1.84Co0.16As2 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.

DOI

10.1103/PhysRevLett.108.147002

Share

COinS