Journal
NATURE PHYSICS
Volume 8, Issue 10, Pages 709-718Publisher
NATURE PUBLISHING GROUP
DOI: 10.1038/NPHYS2438
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Funding
- US NSF [DMR-1063866, OISE-0968226, DMR-11-04386]
- US DOE, BES [DE-FG02-05ER46202]
- Ministry of Science and Technology of China 973 program [2012CB821400]
- US DOE, BES, Materials Sciences and Engineering Division
- Division Of Materials Research
- Direct For Mathematical & Physical Scien [1104386] Funding Source: National Science Foundation
- Division Of Materials Research
- Direct For Mathematical & Physical Scien [1063866] Funding Source: National Science Foundation
- Office Of The Director
- Office Of Internatl Science &Engineering [0968226] Funding Source: National Science Foundation
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High-temperature superconductivity in the iron-based materials emerges from, or sometimes coexists with, their metallic or insulating parent compound states. This is surprising, as these undoped states exhibit dramatically different antiferromagnetic spin arrangements and Neel temperatures. Although there is a general consensus that magnetic interactions are important for superconductivity, much remains unknown concerning the microscopic origin of the magnetic states. In this review, we summarize the progress in this area, focusing on recent experimental and theoretical results, and their microscopic implications. We conclude that the parent compounds are in a state that is more complex than that implied by a simple Fermi surface nesting scenario, and a dual description including both itinerant and localized degrees of freedom is needed to properly describe these fascinating materials.
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