Unified Picture for Magnetic Correlations in Iron-Based Superconductors
The varying metallic antiferromagnetic correlations observed in iron-based superconductors are unified in a model consisting of both itinerant electrons and localized spins. The decisive factor is found to be the sensitive competition between the superexchange antiferromagnetism and the orbital-degenerate double-exchange ferromagnetism. Our results reveal the crucial role of Hund's rule coupling for the strongly correlated nature of the system and suggest that the iron-based superconductors are closer kin to manganites than cuprates in terms of their diverse magnetism and incoherent normal-state electron transport. This unified picture would be instrumental for exploring other exotic properties and the mechanism of superconductivity in this new class of superconductors.
- Research Organization:
- Brookhaven National Lab. (BNL), Upton, NY (United States)
- Sponsoring Organization:
- DOE - Office Of Science
- DOE Contract Number:
- DE-AC02-98CH10886
- OSTI ID:
- 1000438
- Report Number(s):
- BNL-93895-2010-JA; ISSN 1079-7114; PRLTAO; R&D Project: PO-015; KC0202030; TRN: US201101%%200
- Journal Information:
- Physical Review Letters, Vol. 105, Issue 10; ISSN 0031-9007
- Country of Publication:
- United States
- Language:
- English
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