期刊
PHYSICAL REVIEW LETTERS
卷 108, 期 14, 页码 -出版社
AMER PHYSICAL SOC
DOI: 10.1103/PhysRevLett.108.147002
关键词
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资金
- NSF [1005493, DMR-0906943]
- AFOSR
- U.S. DOE
- Direct For Mathematical & Physical Scien
- Division Of Materials Research [1005493] Funding Source: National Science Foundation
- Division Of Materials Research
- Direct For Mathematical & Physical Scien [0906943] Funding Source: National Science Foundation
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.
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